Automatic Transmission Clunks When Shifting Gears

3T with an automatic transmission with manual mode paddle shifters. Changed three motor mounts and one transmission mount today. If the overdrive band is worn, when the transmission shifts into overdrive it will neutral out and start to rev freely, but not accelerate the vehicle. But, today is back with a vengence. The automatic transmission shifts to P automatically if you: - remove the SmartKey - switch off the engine when in R or D and open one of the front doors. Most automatic transmissions available today have this capability. Automatic transmissions allow the factory to control factors such as fuel economy and emissions by controlling when the transmission shifts gears. Thanks I wish I had the know how for that but I don't. The problems with this transmission are hard shifts from gear 1 to 2, erratic shifting from gear 3 to gear 4 and a shudder in the torque converter. Your transmission is necessary in order for your car to operate correctly, and if you start to hear it make a clunking noise, you have good reason to become concerned. When a transmission is starting to have problems, these symptoms can seem insignificant. If I drive along nice and calm( which I do sometimes there is no issue. The Presto-Matic name was only used on Chrysler -brand cars. I have had this vehicle back to the chevrolet dealer three times so far concerning this issue. Couple of days ago while driving, steped on the pedal, and as the revs were going toward 4000 - 4200 rpm, and as i expected it to shift from third to fourth gear it started to go back and forth, a motion that is best described if you start jerking the pedal on and of. Manual Transmission Makes Noise When Shifting I hope someone can point me in the right direction. There is a pretty substantial clunk (similar to a HD) when shifting into 1st and more clunks when going slow , under 3000 RPM's when giving gas and letting off the gas. Clunking, buzzing, growling, grinding, or humming sounds and vibrations coming from your transmission are not good signs. Automatic Transmission Clunk? Every time I am at a dead stop and then press on the accelorator i hear a loud clunk. 7, 4x4 and as I began driving, I noticed the rpm's climbing and it did not shift, and seemed like it was 'stuck' in whatever gear it was in. Swap in a known-good PCM, check wiring, check other sensors such as VSS and TPS. Problems with shifting gears. '99 chevy 2500 116,000 mi- has a lound clunk when shifting from reverse to drive and drive to reverse. Shifting requires selecting the new range via the switch, waiting a second or two for the servo motor to pre-load the shift fork, then backing off the throttle momentarily to allow the unit to actually change gears. In addition, a number of things must happen when you put your car in gear (these will vary drastically depending on whether you're driving a car with a manual or an automatic transmission). If transmission is soft, has drawn out shifts and slipping shifts you can disconnect MAF and drive truck. Loud click noise from rear, when shifting park to reverse or drive in auto 370Z. 384 is not the widest in the business—not by a. Trans fluid is about 12000 miles old, and I added some Lucas Oil right after the problem showed up. Learn how to diagnose a transmission that's shifting roughly here. Other features include driver adaptive shifting and three planetary. Eric-the-car-guy writes on his website (regarding automatic transmission noises): "If you get a clunk or bump when you change gears or go from drive to reverse, check the engine and transmission mounts. 2013 Dodge Grand Caravan Transmission Problems. I am having the same issue. Reverse gear. When I went to drive my 06 WK, 3. John does many other things, but meanwhile he earns his sandwiches fixing automatic transmissions. Transmission Slow to Shift Into Reverse. Guess it was going into a passing gear or whatever, but a noticeable thud was heard and felt. I'm not 100% sure, but I think the CVT actually has two gears, a lower one and a higher one. Fluid is not low or burnt. He changed the transmission fluid and said car was a gem. Taking the truck to the mechanic might be an easier option at this point. Another common cause of the noise is higher than normal engine speed – which is bound to occur whenever you start up a cold engine. This only happens shifting to Reverse, and it goes away when the car is warmed up. This is normal on every car. Loud "clunk" when changing gears - Answered by a verified Mechanic for Honda We use cookies to give you the best possible experience on our website. Listen for any rumbling, growling or mechanical metal-to-to metal noise in each gear just after it shifts. There is only two times where an automatic transmission goes into first gear. More than 1 second to engage in reverse or drive Won't shift into higher gears or does so reluctantly Transmission jerks or slips between shifts But before you let anyone try to convince you to replace it, DO. One of the major signs that an automatic transmission is starting to fail is if the transmission begins slipping gears. Once when you drop the shift lever down to. After the flush, it shifts smoother, but it still makes clunking sounds, only when shifting to second gear (both from first and third). If your engine will rev up, but the car won't shift into gear or move it could be a defective torque converter. So I own a 03 chevy cavalier with the 2. i have try looking for play in the drive shft but it seems tight with no play. What causes a transmission to clunk when shifting? My car's been clunking when shifting, both up and down, from 1st to 2nd, or from 2nd to 1st. However, the overall span of 7. Ford says it is a character of the Mustang. Is it physically impossible to move the gear shift into any other position? Here are a few possibilities that could be causing the problem. Before you panic, check out our handy step-by-step guide on how to diagnose and fix a transmission that won't shift. I can sometimes get a clunk when I'm backing out of my driveway and putting it into D and stepping on the gas while still rolling backwards. I saw this thread today after googling my problem: Loud Clunking Sound When Changed from Parking to Reverse My problem is the same except for 2 important things. The speed sensor is especially prone to causing this type of transmission problem because the vehicle's computer is not properly regulating performance for the correct speed of the car. Start in P, then cycle through all the gears, ending up in P. I'm not sure if this is a problem or. John does many other things, but meanwhile he earns his sandwiches fixing automatic transmissions. Usually this type of problem is due to low transmission fluid or a low fluid pressure internally of the transmission. Chevrolet Silverado: Why Does My Transmission Clunk? There are a couple of issues that can cause this nasty sound. sound when shifting the gear comes within a transmission. Im not sure if the throttle lag is making the trans feel defective at times or if its complete ly seperate problem. Once when you drop the shift lever down to. If there are low levels of fluid, then it will take longer for the gear change to take place. I blame it on the PCM and the "learned" transmission shifting as this is out of my "norm" and the computer is confused on whether to slow or not. Firm downshift while passing. I have a 97 ranger 4x4 w 4. 3T with an automatic transmission with manual mode paddle shifters. With a manual transmission, the most common red flag is grinding when you shift. Due to internal design, "ALL" automatic transmissions from Honda and Acura, except Passport, will emit a clunk noise whenever shifting from D4 to R or R to D4 with vehicle standing still. There are many different kinds of automatic transmissions in vehicles today. Reader Question. The transmission had started clunking when engaged in reverse and also when shifting between other gears. Yes I feel the automatic transmission is increasing the lag for the cases where I am slowing down and then give it gas and it delays and then clunks into gear. The downshifting approaching a stop was hard too. Drain transmission fluid and remove pan and filter. There is only two times where an automatic transmission goes into first gear. Learn vocabulary, terms, and more with flashcards, games, and other study tools. I started working with a tuner and it was better, but cold out of the gateit would up shift with a clunk. The primary function of the rear differential bushing is to provide smooth and quiet transfer of power from the engine to the rear wheels of your vehicle under. This is normal. If your vehicle is shifting gears roughly or making odd noises it may be time to contact a local Denver rebuilt transmission repair specialist. When taking it on a test drive, I found the automatic transmission was racing up to a high speed and shifting with an abrupt clunk. I'm not 100% sure, but I think the CVT actually has two gears, a lower one and a higher one. They performed the quick learn tsb after service manager verified rough shift. Transmission fluid that has aged and lost some of its frictional properties can also lead to poor shift quality. Top gear (Hi-range, after automatic up-shift) is actually direct drive: the driveshaft speed is equal to the input shaft speed. Slipping While Driving: You may notice your vehicle is not accelerating normally. it stays in too high of a gear and then realizes how much the vehicle has slowed and goes from 4th gear to 2nd. If you own a car with a manual transmission, you are aware of all the nuances that go along with it. Thanks I wish I had the know how for that but I don't. Tranny downshifting hard into 1st gear. Yes, I have looked extensively and can't find an answer. bushings for about $70 (these will ride kinda rough). The primary function of the rear differential bushing is to provide smooth and quiet transfer of power from the engine to the rear wheels of your vehicle under. Replied by K. I just recently bought a Saturn SL2 with 65k miles and automatic transmission. If you have indeed verified that the fluid is proper and clean, up to proper level. My transmission felt like it bucked me one time and on multiple occasions it feels like the transmission is slipping. This happens in between 40, sometimes 60 to 65 KM/H. Whether your car is an automatic or a manual, regular maintenance of your Grinding or clunking noise when shifting gears, Leaking transmission fluid. 2004 Ford Ranger 3. Hello all, I joined this forum after my 99 Durango 4x4 5. Constant shifting can put strain on your vehicle, which may manifest in the form of a delay or lag of a few seconds when putting the vehicle in reverse. I seemed to be OK if I drove it hard, but driving easy, it would clunk. It is hesitating or driving sluggish in drive. The engine rpm keeps increasing but there is no increase in the speed; this is another indicator you should watch out for. You might also have damaged the gears in the transmission at the area between first and. Dodge says it is fine. I have also had issues with the four wheel drive not. The speed sensor is especially prone to causing this type of transmission problem because the vehicle's computer is not properly regulating performance for the correct speed of the car. Also:-- check the shiny chrome part of it that plugs into the front of the transmission. Parking Brake Stuck. As some of you know I've recently purchased a tacoma, 2001 6cyl sr5 trd, automatic. Manual transmissions can have the same lacking response issue, but after shifting into gear the engine’s RPMs will surge, but the car won’t move as fast as. Use some fast acceleration, allowing the transmission to firmly shift. Motor and transmission mounts provide a cushioned point-of-contact between them and your vehicle's frame. Thanks I wish I had the know how for that but I don't. it stays in too high of a gear and then realizes how much the vehicle has slowed and goes from 4th gear to 2nd. A manual transmission may sound like mechanical humming when it has. This only happens shifting to Reverse, and it goes away when the car is warmed up. Generally, manual transmissions sound more mechanical and give a clunking sound when shifting gears. then drags it out and clunks into 3rd. Replied by K. When i went to shift to 2nd gear it grinded then too. Additionally, if your motor or transmission mounts are failing, you'll often feel vibration from your drive-train inside the vehicle. Depending on whether you have a manual or automatic transmission, your car may respond differently when your transmission isn't working correctly. At very low speeds 0-5mph I can let off the gas and sometimes get a clunk sound from under car in transmission area. Yes, you only need to replace the front bolts. Are you parked on a hill? If so than the force of gravity may be forcing your transmission to put pressure on the parking lock in the transmission. For example, you may find that you're only able to drive the car in the automatic transmission's third gear, only being able to select the other two gears when you shift the transmission manually. Inspect for wear where it has been spinning in the pump bushing. If transmission is soft, has drawn out shifts and slipping shifts you can disconnect MAF and drive truck. It was a BIG slam into gear each time. excessive play in the driveline) since you didn't complain of downshifting issues but rather a thud/clunk when you put the car in gear. This is usually a transmission-based concern. I blame it on the PCM and the "learned" transmission shifting as this is out of my "norm" and the computer is confused on whether to slow or not. In ‘Limp In Mode’, the automatic transmission will not downshift or upshift at all. But, today is back with a vengence. Designed for longitudinal engine configurations, the series includes 4 forward gears. Other indicators include bad connections within, or worn out sensors and faulty solenoids. Note A bump feel or noise may also be due to fuel movement in the fuel tank when not completely full. However if I "floor" the accelerator os get any way aggressive with it, there is a clunk, the gear stays stuck in 4th I think. Auto users have complained about shifting issues during high spirited driving events (clunking, hard downshifting, etc. 2009 F-150 4x4 automatic transmission, 66K miles, purchased new. This only happens shifting to Reverse, and it goes away when the car is warmed up. any idea if this is my auto box or has my front diff got play in it. I have been working on this for quite a while. and hey I'm sticking to it. However,when. 384 is not the widest in the business—not by a. The engine must be on. This most commonly occurs with manual transmission cars due to driver abuse or those learning to drive a stick shift and not properly shifting gears. The valve body can be repaired/replaced, however this problem should be repaired as soon as possible to avoid further damage to the transmission. Clunking, buzzing, growling, grinding, or humming sounds and vibrations coming from your transmission are not good signs. Would I change anything? If I were the engineer, I would eliminate the rev-hang feature and extend the ratio of 6-gear for better freeway MPG. I have a 2017 F150, with the new generation 3. Drain transmission fluid and remove pan and filter. The 'autostick' had no response either. DeSoto called the transmission the Tip-Toe Shift , while Dodge used Gyro-Matic , Fluid-Matic , Fluidtorque , or Gyro-Torque. I shifted the car into park and then exited the Ford Explorer. My shifting is generally not the greatest and I feel every gear as it makes a little bit of a clunk, but lately I've been having trouble getting my car to shift up once I reach about 40mph. To keep things fresh, your transmission has a filter to. It goes fine into reverse, neutral and all drive selections, just won't shift. This is normal. If the servo that applies the band is stuck or has badly damaged seals the symptoms will be the same. Transmission Clunk when shifting into sports mode At some point during the month of August the Roadfly forums are going to become archive only. 2002 9-5 Aero, automatic transmission hesitates and clunks into gear Hopefully someone can shed some light on what might be causing the following: When shifting from reverse into drive, after backing up, the transmission hesitates and then clunks into gear. Still, changing the spring in this accumulator is one of the ways performance tuners speed up shifts in automatic transmissions. I have an 88 with an auto. I knew right then and there i had a serious problem. As a vehicle ages, these cushions can shrink, become brittle, split and they may even fall out-of-place. When I brake normally,and I put my hand on the shifter handle in the cab, i can fill it he clunk through it. Subject: Clunk Noise When Shifting More Noticeable At Low Speeds - keywords clutch manual throttle transmission #PIP3896 - (08/28/2007) Models: 2004-2007 Cadillac CTS-V 1997-2007 Chevrolet Corvette Equipped with a Tremec 6-speed Manual Transmission The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI. If you have a clunk or other noise when shifting into gear, this may be normal wear/play in the differential, worn u-joints or CV-joint in the driveshaft or perhaps worn transmission mounts. Modern transmissions shift so softly and smoothly that we often forget they are even working. The only logical transmission for our 4x4 was the 4L80E four-speed automatic transmission commonly found in 3/4- and 1-ton GM trucks and SUVs. Burnt smelling transmission fluid (dark in color) Fine metallic particles in the bottom of the oil pan Delay in shifting out of park. Im not sure if the throttle lag is making the trans feel defective at times or if its complete ly seperate problem. It almost sounds like a manual gearbox. probably not good on. I have just bought an E46 Alpina with auto box, and mine clunks, especially in first and second gear. in shifting gear, in case of a manual transmission system. It goes fine into reverse, neutral and all drive selections, just won't shift. Was running great and then one cold startup returning from an errand I suffered the dreaded clunk/lurch into gear. Automatic transmission problems and help from new products. Shift the transfer case lever to the right and pull firmly down into 4L. Transmission Issues I drive a 2005 Chili edition thats at 60,000km, and just recently have noticed when the vehicle shifts into first there is a pause, and then it clunks into gear. I made another video showing how to replace this part: https. Automatic Transmission Clunk? Every time I am at a dead stop and then press on the accelorator i hear a loud clunk. Most automatic transmissions available today have this capability. The automatic transmission remaining momentarily in neutral, after we shift into gear, means we have a delayed engagement. The 2000 Honda Accord has 13 problems reported for clunking between gears when shifting. Corolla Automatic Transmission Shifting Results 1 to 4 of 4 Discuss Corolla Automatic Transmission Shifting in the alt. The gear you feel should turn only in one direction, not both. The Mercedes-Benz Automatic Transmission provides a reverse gear and four forward gears. If a clunk is heard when shifting gears or the gearshift lever rattles over rough roads, the bushings could be bad. I have a rough shift from 1-2 at parking lot speeds. What's the. It WILL NOT happen until I let up completely off the brake. 8 liter, EFI engine. When you rock the shifter up and down, it moves this back and forth. In fact my c. Learn how to diagnose a transmission that's shifting roughly here. 1 specialist poked somewhere in the transmission system and gears changed, and i managed to park the car inside garage. We spent the winter away from our home in midcoast Maine but not…. The valve body can be repaired/replaced, however this problem should be repaired as soon as possible to avoid further damage to the transmission. She has a tendency to rev the engine up a bit before she fully releases the clutch and when the clutch finally grabs is when the noise is the worse. Replacement restores the shifter to proper operation, ensuring that the letters on the shifter align with their respective gears. Most automatic transmissions available today have this capability. This is normal on every car. The TSB fix may correct the issue with your "thud/clunk" by accident, but it sounds to me like the TSB is about correcting rough downshifts in the A8. I blame it on the PCM and the "learned" transmission shifting as this is out of my "norm" and the computer is confused on whether to slow or not. At a guess, i'd say a valve seal has gone, the electical resistances are all in order, so the light doesn't come on immediately, but when it asks the valve to shift fluid and do something, it. i come to a complete stop with my foot on brake too when i shift into drive! so its the cars fault not mine. I look around undre teh truck, no fluid and everything is in place. Automatic transmission makes clunk noise when downshifting - Answered by a verified Ford Mechanic We use cookies to give you the best possible experience on our website. It may be coincidence, but we are usually turning. Rotating the lever all the way counter-clockwise will put the transmission in Park (this is where it should have been when you removed the linkage arm). He changed the transmission fluid and said car was a gem. Quick fix: Transmission clunk technical When you find yourself not being able to change gear without a clunk then you may have worn splines on your halfshafts and drive members, due to high mileage or heavy clutch changes. Especially when manually down-shifting, i've tried it and it didn't feel like a good thing to do to the a/t. These sounds are often a classic symptom of this condition. Changed three motor mounts and one transmission mount today. Eric-the-car-guy writes on his website (regarding automatic transmission noises): "If you get a clunk or bump when you change gears or go from drive to reverse, check the engine and transmission mounts. Depending on whether you have a manual or automatic transmission, your car may respond differently when your transmission isn't working correctly. There's a ratcheting mechanism that turns the shift drum about 1/8 turn every time you shift. If the overdrive band is worn, when the transmission shifts into overdrive it will neutral out and start to rev freely, but not accelerate the vehicle. Automatic. I have an 88 with an auto. 2013 Dodge Grand Caravan Transmission Problems. This disabled the distributor vacuum advance in all gears except high gear, and is a single wire switch threaded into a pressure port near where the cooler lines are located. My year 2007 Volvo S60-T5 auto transmission is AW55-50/51SN. 9 automatic transmission as well as common problems, troubleshooting tips and frequently asked questions. These transmissions are favoured for. i come to a complete stop with my foot on brake too when i shift into drive! so its the cars fault not mine. There is only two times where an automatic transmission goes into first gear. It is hesitating or driving sluggish in drive. Here are a few warning signs that your car may be in need of transmission repair. Also, the RPM needle sometimes goes slightly up or down in a shaky movement by itself. It is a sliding-gear four-speed transmission with an auto-matic shifting system incorporated into it. The first place to check for you clunk would be the transmission and engine mounts, it's also possible for it to be internal to the transmission, or to the drive axles. for about $250 or solid alum. There are several causes for this delay in shift… Low Transmission Fluid Level, Dirty Filter or Valve Bodies, Torque Converter Clutches Failing, Linkage out of adjustment or (on modern vehicles) Electronic Fault withing Transmission Control Module. This is a pressure switch that was used ~1972-'73 for the Transmission Controlled Spark (TCS) system. Why does my automatic gearbox make a clunking sound when I shift from P to D? Sometimes, when I engage "D" from "P", I hear a loud "clunk". When taking it on a test drive, I found the automatic transmission was racing up to a high speed and shifting with an abrupt clunk. What i meant was manual as in standard transmission. This also happens when I come to a stop or when I shift from neutral to park. Make sure it is, but I think it is coming from the rear diff. 63 Clunking noise is still heard in the rear end when shifting from reverse to drive or park to reverse. with disconnected TCM will revert to TPS signal to shift transmission and pressure etc. CLUNK or BANG when shifting; driver's seat should be holding the regular brake when putting the van in and out of gear. It may be coincidence, but we are usually turning. The fact is the sounds that occur because of transmission problems vary amongst different vehicles. Without driving the car, we would not assume that this is an internal transmission problem with the info that you have given. So I own a 03 chevy cavalier with the 2. Regarding automatic transmission shifting. If you have indeed verified that the fluid is proper and clean, up to proper level. Engine idles normally but car will not drop into gear. However, the amount of gear shifting that you must do does eventually wear down the clutch. The problems with this transmission are hard shifts from gear 1 to 2, erratic shifting from gear 3 to gear 4 and a shudder in the torque converter. The ZF 6HP26 automatic transmission has been developed for vehicles with an engine torque of up to 600 Newton-meters (Nm). This article provides an overview of the 722. Im not ready for transmission repair in near future. You may have to register before you can post: click the register link above to proceed. Manual Transmission Makes Noise When Shifting I hope someone can point me in the right direction. Manual transmissions can have the same lacking response issue, but after shifting into gear the engine’s RPMs will surge, but the car won’t move as fast as. I'm not 100% sure, but I think the CVT actually has two gears, a lower one and a higher one. See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. While test driving it, I changed gears numerous times to see if it slammed into any gears or hesitated. On vehicles equipped with an automatic transmission, if the transmission computer detects an issue with the transmission, it will cause the Check Engine Light to appear on the dashboard. It only freewheels and the engine revs. This is not abnormal and nothing to be concerned about. While you might not think so, your transmission has been under attack from day one! In fact, in the couple dealerships I worked in, and the many I go to, you'll find every 3rd car or 4th car is getting transmission repair. Transmission fluid that has aged and lost some of its frictional properties can also lead to poor shift quality. You may hear a thud/clunk noise while attempting to shift gears as well. And a little clunk from the differential when on an off the throttle with a manual transmission is normal, you don't get that with the automatics due to a sprague. and it "clunks". With a manual transmission, the most common red flag is grinding when you shift. Why does my automatic gearbox make a clunking sound when I shift from P to D? Sometimes, when I engage "D" from "P", I hear a loud "clunk". Under these conditions, there is likely to be a “clunk” when you shift the lever out of “P” as the lock is released. 2013 Dodge Grand Caravan Transmission Problems. All of the magic happens in the fluid. I could replicate this by shifting from D to S mode and back. Dodge says it is fine. Changed three motor mounts and one transmission mount today. Someone wondered whether the problem might have to do with the linkage from the stick shift to the transmission, wondering whether the "rod" between the stick shift and transmission might need to be lengthened. The “clunk” noise will be chassis & drivetrain components: consistent in nature, and will occur during most 2-1 downshifts. Lincoln MKZ Harsh or Delayed Shifting of Automatic Transmission - 226 reports. and then a hard shift with. Slowing down and decelerating becomes a problem when the transmission starts to jerk or clunk. Clunking Noise. DeSoto called the transmission the Tip-Toe Shift , while Dodge used Gyro-Matic , Fluid-Matic , Fluidtorque , or Gyro-Torque. All of these conditions will lead to clunking noises as your vehicle is put into gear. the car starts and you can shift it into Drive, Reverse, whatever but the car physically will not move. This is usually a transmission-based concern. The shifting is positive and the harmony created between the engine, transmission and clutch operation is perfectly fine by me. 5 litre pre-owned and have been experiencing erratic shifting in my automatic transmission. I checked the linkage interface and it all seems to be in order. Still, changing the spring in this accumulator is one of the ways performance tuners speed up shifts in automatic transmissions. i come to a complete stop with my foot on brake too when i shift into drive! so its the cars fault not mine. 9 automatic transmission as well as common problems, troubleshooting tips and frequently asked questions. If the clutch is in good shape and you still can’t get your transmission to shift out of 4th then you have some internal damage to your transmission. Clunking sound when shifting gears. Transmission Slow to Shift Into Reverse. I thought we could have the transmission tuned up, but apparently that's not something that can be done (see my other post). Manual transmissions can have the same lacking response issue, but after shifting into gear the engine's RPMs will surge, but the car won't move as fast as. You might also have damaged the gears in the transmission at the area between first and. The new grease is not compatible with the automatic transmission fluid (ATF) and can cause damage if mixed. Read honest and unbiased product reviews from our users. I have a 2002 SL1 (auto transmission)with over 150,000 miles on it. 2 ecotec, 195k miles, and for about a month now when I shift from park to drive (automatic transmission) I can her a bunch of clunking sounds, sounding like gears locking in place or something, same thing happens when I'm at a dead stop, and accelerate,. Extreme Duty Allison 1000 Tow Matrix transmission. Ford says it is a character of the Mustang. As noted in a previous section, with a manual transmission, a common sign of trouble is a grinding sound or feeling when you shift into a new gear. I decided to have my transmission rebuilt. If these factors are not the problem, then it is best to take the vehicle to a licensed mechanic for service. I own the 2000 XLT 4 wheel drive with the 5 speed automatic transmission, I have been the only owner, pushing 50,000 Miles and have from time to time driven it hard!, When I start and stop I get that "clunk" in the back end, it has done it forever!, My transmission doesn't slip, in-fact I still find I have better torque, and nice shifting. When your vehicle’s computer tells the transmission to shift gears, hydraulic pressure (provided by the fluid) squeezes a series of plates together inside a clutch pack to connect the engine to the transmission output shaft and. One of the major signs that an automatic transmission is starting to fail is if the transmission begins slipping gears. Here are a few warning signs that your car may be in need of transmission repair. Set the parking brake first before taking your foot off of the foot brake and the car's weight will rest on the brakes. then drags it out and clunks into 3rd. It has 41,000 miles. I started working with a tuner and it was better, but cold out of the gateit would up shift with a clunk. I've noticed an odd aspect to our 2015 Ford Mustang GT's manual transmission. --stick a finger deep into the converter. ) when downshifting (automatic trans) Same can be heard when you are cruising along and then step on the gas alittle harder and get the clunk sound and when you take your foot quickly off the accelerator. anything serious or no?. Swap in a known-good PCM, check wiring, check other sensors such as VSS and TPS. Still, changing the spring in this accumulator is one of the ways performance tuners speed up shifts in automatic transmissions.