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Pontiac Grand Prix Transmission Problems



  • My car a 1997 Pontiac Grand Prix SE 3800, when started and in drive will not move like its in neutral. It has shifted just fine up until about a week ago when checking the fluids i noticed that the tran fluid was low, I put the correct type of fluid and did not over fill it (I might have caught it so late?) . After that time when i would be driving for an extend period it would what i would call shift like someone who is learning to drive a manual.
  • pohodarpohodar Posts: 4
    Just bought 99 grand prix GT and i like it a lot.....BUT i just noticed that when im driving on the highway my RPMs are pretty hight....70 mph little over 3000 which is way too much for overdrive....also if i put it in 3 the rpms are very similar....another simptom is when you let of the gas the rpms drop to idle...it seems like it shift in neutral and when you hit the gas again it has to come up to 3000 for it to start going again....
    other than that the car shift and drive smooth and fast....
    Someone please tell me there is a cheap way to fix it....
    PS Love this site very informational.....:o))))
  • redclownnredclownn Posts: 2
    Hey guys/gals. I bought a 2000 GP GT with 141k a couple weeks ago. I recently went on a small road trip (about 60 miles) and my friend and I noticed that my car was running high RPMs. Around 4000 @ 80mph. My friend said that my overdrive might be out. Luckily I got a 18/18000 power train warranty with the car. I'm going to bring it into the shop tomorrow. I've been reading on here that a few have mentioned a hub assembly. To me I don't think that would cause the overdrive to go out. I'll let you all know what they find out tomorrow, if anything.
  • pohodarpohodar Posts: 4
    I have a GP GT 99 and my overdrive is also not working i am very interested in what you find out....I am taking my car to a pontiac place friday....im hoping its not gonna be too expensive....:o))) :shades:
  • redclownnredclownn Posts: 2
    I found this website that might help a lot of us that have the 4T65E transmission. I list a lot of problems people have listed on here.

    4T65E Transmission Info..

    Some things it lists are:
    Neutrals at stops, Shudders on take off
    Tach bounces up and down a few hundered rpm while cruising in lockup
    No 4th Gear
    and a few others.

    Hope this helps a lot of us! :)
  • have a Pontiac GrandPrix 1995 SE V6 3.1 VIN M. The EGR is leaking exhaust air through EGR valves. I changed the EGR with 2 used one and got the same issue. I installed a new one and I got the same issue. This hot air is causing cables and vacuum lines to burn. I changed the EGR gasket too and is not leaking hot air at the gasket. I verified any burned cables and there are no cables burned.

    I changed the vacuum lines that goes to MAP sensor, PCV, and intake air tube.

    This occurs when I push the throttle up to 1500 - 2000 rpms. This issue is annoying. Please help. I am thinking to change the TPS and the MAP sensors because these sensors usually controls the EGR but I am not sure. :cry:
  • pohodarpohodar Posts: 4
    @!#$#%$% not very happy about that but works fine now...
  • gp1998gp1998 Posts: 1
    I have the same issues with my GP - now progressed to failing in Drive, 3 and 2 last week and now this morning Drive and 3 acting like reverse and 2 working...and locks not working except manually...

    Did you come to any solution?
  • what did they find out? (why wasn't it going to overdrive?)
  • I had a similar problem...come to find out my shift cable was the wrong one....so might wanna check out if your shift cable is connected properly.
  • did you ever figure out this problem? having the same problem with my 99 grand am 3800
  • i have a 2000 grand prix gt with tranny problems when i shift it in to drive it wont move but if i shift from low range on threw to drive it will then move but if i was to suddenly stop and try to go aging it wont accelerate there fore i have to start the process back over once i get going its ok for the most part could this be caused from a software problem or the shift servo
  • I was wondering if anyone would know why my Tachometer on my '05 GXP bounces why i am at steady speeds on the road, I read it has either has something to do with the DOD system or a solenoid valve. I just had the fluid changed along with the filter.
  • i have the same problem with my 2002 grand prix gt .i got the filter and oil changed it work for awhile and it back within a couple days
  • feder2feder2 Posts: 1
    my trans just went out no warning; was into Pontiac for general 27 pt inspection and oil change one week ago. 58K miles 2005 GXP what broke???
  • jjg27jjg27 Posts: 1
    Ok, so when I got 50+MPH I can hear a high pitched squeel from my engine and my car will stay at like 2500 RPMS the entire time I am on the highway, no matter how fast I go...I think its my overdrive not working??? If it is does anyone know If the entire transmission needs to come out for that to be fixed on a 2001 Grand Prix 3800 motor????
  • salvsalv Posts: 1
    I have 99 grand prix sedan.... when i turn it on and drive away some distance... then the tranny doesnt kick in. When i turn it off then i turn it back on it runs fine for a lil while. then i repeat it again. is it the sensor????
  • The transmission in my vehicle went out in October 2009 and the vehicle only had 60k on the odometer. I have been reading a lot of post and clearly there is a problem with the transmission that GM put in this vehicle. The vehicle started acting up again after 20k in March. The Dealership I had it replaced at has had my car for a month. I initially took it to this dealership because my transmission went out on a weekend I had an extended warranty through Nissan and was unable to verify if I could take the vehicle to any repair shop so I took it to the local Nissan dealership. However they have been giving me the run around first they fixed the motor mounts and then they figured out that I was right about the transmission. The transmission was supposedly fixed to be returned to the GM dealership who failed to fix it the right way. I would like to know with all the problems that GM is having with this transmission has there been a recall or are they helping with repair bills on this vehicle. Is there any one I can contact to complain about the problems with this transmission? Any help I can get will be much appreciated.
  • gmcustsvcgmcustsvc Posts: 4,252
    I am from GM Customer Service. Just to clarify was the transmission fixed at the GM dealership or the Nissan dealership? Is the vehicle currently under warranty? I can check for recalls I will need your VIN number to do that. Did Nissan not cover the transmission under their warranty? Thank you,
    Mariah GM Customer Service
  • I need to check but I believe the first transmission was bought from GM and put in by the Nissan dealership. But the remanufactured transmission was put in by GM. The transmission was covered under warranty and my vin # is 2G2WC54C651320894. Thank you for your assistance.
  • beepo9beepo9 Posts: 1
    My 2006 when coming out of neutral to drive or reverse some times just sits there ,then I think I am driving a Toyota it just jerks forward at a high rate of speed.
    Other times stutters before it finally goes into gear.I only have 48000 mi. Is this Tranny problem? Or something else maybe? No power train warranty on 06.
  • gmcustsvcgmcustsvc Posts: 4,252
    I am from GM Customer Service. Can you please email me at [email protected] with some more information? Thank you,
    Mariah GM Customer Service
  • I have a 2005 Grand Prix GXP and I have the same problem. It acts as if it shifts out of drive and into neutral at stops. Not all but most stops. Feels like the transmission is slipping but then BANGS into gear and takes off.
    I notice at highway speeds you can feel the car as if it has trouble going into and staying in Overdrive. Since there might be a sensor or a small valve out it could be confusing the DOD (3rd and OD activation) and that is what causes the highway issue. There are a few sensors and valves in the transmission so I don't want to pay out the wahzoo to replace every one of them If it is just one.
  • dustinryandustinryan Posts: 1
    Hello, I have a 2000 grand prix gt and I am having a problem. The car will start, shift into gear and drive fine until i stop. Then with no indication it seems to go to neutral and will not move. The car will shift to park and that seems to engage but I cannot reverse or drive. After I turn the car off and back on I can shift it to gear and it will drive fine again. I had the tranny 4t65e rebuild a year agoe and im just outside my warrenty. Could this be a sensor or the computer or transmission? I have no Idea and I dont want my pants pulled down over the price on a new tranny.
  • tgaudettgaudet Posts: 1
    i am having the same problem. any solution to get that problem repair
  • jheard282jheard282 Posts: 1
    I have a 2000 Pontiac Garand Prix GT. When driving over 45mph the RPM hand reads 3000RPM and higher. Its not shifting to the last gear. When I depress the gas pedal, it feels as though the car shifts to the neutral position (giving me the idling effect) and the RPM hand drops to 1000. I had a diagnositc done from Firestone, they suggested a tune-up. Had the tune-up done and the problem still exists. I have gone to other automechanic stores and they have all suggested different things and nothing is solving my problem. Any suggestions?
  • tillatilla Posts: 2
    I was driving my car and when i went to park the shifting linkage got stiff so i disconnected the cable and its internal. Is this a common problem and is it easy to fix ??? thanx
  • tillatilla Posts: 2
    Inside the transmission I mean by internal....all of a sudden the linkage rod that goes inside the transmission is hard to move......
  • Exactly like message #51. I have previously owned a 2000 GP and now a 2001 GP. BOTH have had exactly the same problem - shuddering when trying to accelerate, tach needle jumps up and down, hill climbs are terrible. I called a local GM dealer about the possibility of a pcm update, but he says he needs the "codes" to look it up. He said the GM website says nothing about an update related to the transmission. So what do I have to do to get the update without spending alot of money on diagnostics and stuff?? I am not very car literate. ;) I have a ton of other work that needs to be done on this car so I don't have much money available for UNNECESSARY repairs and expenses! Please help!
  • Hello,
    The transmission was not fixed at a dealership, either time. The first time, a GM employee, transmission specialist, fixed it. the second time, a mechanic friend fixed it. I just paid $2200 for the second transmission. Is this going to go out every 70000 miles?!? The warranty had already expired. The first time at 70,000 miles, next at 141000 miles. This car sits up almost as much as I drive it. VIN# 2G2WC55CX61217929. I am also a GM employee for 26 years. Please help!!
  • I have an 1995 pontiac grand prix 3.1 SE, My speedometer does not work, i have changed the speed snesor, i have changed the dash still not working, But one day i drove the car and put it on the highway and it started to working, soon after it stop working. Need help to fix problem.
  • montycarlomontycarlo Posts: 1
    edited August 2010
    I also had same problem with my 95 gp, dealership said there was no codes showing, they could'nt get it to surge, while car was there they replaced EGR, I had a service engine light on, I knew I needed one, but they guarenteed it would fix the problem. (ha-ha nope) took mechanic for a ride to show him still surges on slight incline at 50-60mph, he cleans fuel injectors, took him for another ride cause it still was surgin, third time was the charm, it was a crack spark plug, could'nt see the crack, but the porcelin part of it was black. We were amazed that this was the problem, so 750.00 for the EGR, but no charge to clean fuel injectors, or replacing the spark plugs
  • mwattsmwatts Posts: 1
    Just started tonight. When the car hits 2K-2.5K RPM there's a whiring sound coming out of the front. Under no sound, over, no sound. However when going up a hill past the 3K mark, it feels like it slips and cuts back down.

    I really hope this isn't the transmission. Anyone have any ideas? I checked the transmission fluid when we got home and it was clean as it could look. A few months back I had a spark plug wire pop off and caused some jerking while accelerating, but nothing like a whiring sound that we're getting now.

    Please help. I know nothing about cars at all!
  • Anyone have ignition key locking in ignition probs - mine does and after new keys -tumbler still does - my gm boys tell me i have to replace complete shifter tower at $1400.00 or so for parts- car has only 60,000 miles of hyway driving on it. I have never heard of replacing shifter tower before-- does this make sense ? should there not be a cheaper fix if this indeed is the fix ? EM me if you have [email protected] - I thank you
  • Had the same prob on my father-in-laws ended up changeing the ignition out lot cheaper and fixed the problem
  • Car ran great to San Diego 72 miles. When got in car to come home could not get up to speed car started bogging out like starving for fuel. So replaced fuel pressure regulator. Didn't fix the problem. Went to next step and replaced the fuel pump. Also replaced Trans due to slipping. Trans direct from GM $1600 and change. Fuel pump $355 Fuel pressure Regulator $75 still easy pressure on accelerator will build speed try to accelerate normal to build speed and boggs out no power what am I missing. What else is there HELP ME HELP ME PLEASE Going completely insane almost looseing my mind
  • had similiar problem with my 2002, just last month. Catalytic converter was plugged up and had to be replaced.
  • grwatchergrwatcher Posts: 3
    edited September 2010
    For over 2 years I had the same hesitation up slight hills from 45-70 mph as post 51. RPM's didn't swing wildly though and stabbing the gas pedal got the car to stop hesitating. Spent $150 at a large dealership for them to suggest a new torque converter for thousands of $$ because they could not find the problem. I couldn't afford it so continued stabbing the gas. My now son-in-law and his friend rode with me and said it wasn't a transmission problem but a power problem. When I stabbed the gas pedal, they said, I was resetting the engine's power output (or something like that). They suggested a tune up and timing belt adjustment if the tune up didn't work. It didn't but I didn't go further with it.

    So last month the Low Coolant light came on. My local Firestone had the car for a week and finally figured out that problem. They are great guys but that is all another story. After I got the car back, no more hesitation. My car drove beautifully! I talked with the mechanic: he had found 2 wires close enough to each other that they were arcing so he rerouted them and they stopped arcing. That was the only thing he thinks fixed the problem.

    So if you have hesitation, you may want to find a good mechanic and have him check out everything to do with the power of the engine no matter how small.
  • My wife's 99 Grand Prix will not shift into drive or revers for about 2 - 3 minutes. It will not shift into gear until you hear a slight click from the floor console at the shifter. Could it be a vacuum leak or just something sticking? She has spilted pop on the floor console at least once that I know of. Other then wating for that slight click sound to so that your able to move the shifter, it a good running car.
  • Like martin I have just gone through he same BS.

    2003 GTP special edition w/70,000km. Trani was stallin @ stop signs/lites. accelerate @ it would hesitate the spin rubber & jolt. took it to a GM dealer who said there was "no problem". I insisted & they drove again. Told me trani was shot & w/b $3800 min to fix or $4800 min to replace !! Took to an independant authorized GM repair shop. $3200 later it's fine. went on GM's chat line & was `told maybe there was sumthin they might do & I should save receipts. follow-up call but no satisfaction. Got a response from their Rep that said so sorry.... If I went to the dealer they could have helped me?? Was I talkin to someone from a call center in the middle east???

    35 yr GM customer (6 new vewhicles from Eagle Ridge Pontiac in Coquitlam) can't build a trani that lasts beyond 70,000 km?

    Guess I'll move over to Ford, surely they know hoew to buil a trani?

    Have been a GM fan for over 35 yrs & bought new & used forever.
  • 1) Do you get an engine check light?
    2) Do you hear valve tapping noises?
    3) Did you check your ign system? [Coils, wires, plugs]
  • ne0305ne0305 Posts: 1
    edited October 2010
    Can someone help please help me with some answers?I Own a 2000 Grand Prix Gtp and My transmission began acting strange 2 days ago. I was driving it then i came to a stop because of traffic and when it cleared drive or 3rd would not engage, only 2nd and 1st gears. This happened to me 2 years ago and i got the tranny rebuilt for 1230.00 now its acting up once again with the same issue without any signs at all. Can someone give me an answer to what could be a matter with it. please thanks
  • I have a 2000 Impala with the same issue you described. The engine runs great from gears 1-2 and sometimes when it hits 3 and definitely 4th, I feel the surging, but only when I apply the gas pedal with moderate acceleration. If I tromp on it, the surging goes away. If I let off the gas pedal a little, the surging stops.

    I was wondering if you ever found your problem ? I work on cars A LOT and I can usually find the root cause issue to issues like this when they are repeatable issues. This one has me mind boggled. I have tried blocking off the EGR. I took out the PCV and inspected and found nothing wrong. I changed my spark plug wires, and tried many other things and still no difference.

    I have a few more things to try, but wanted to see if you ever found out what was causing your issue.

    Let me know.
  • My girlfriends GTP is also having this issue...we hooked a scan tool to it and it said it had problems with a solenoid. So we took it to a trans shop and they told the car to force the solenoid to engage and it didnt work. Basically there is a band the broke in your transmission.
  • jiovonnigjiovonnig Posts: 2
    edited November 2010
    I am having this problem with my 2001 pont. grand prix. My low coolant light stays on inspite of the fact that I changed the low coolant sensor and the radiator. the car does not get hot at all.I seem to have no power between shifts once I reach 50 mph it seems fine but below that it will not pick up properly and if I press hard on the gas it wil grab and run the rpms way up but doesn't sound or feel right.Any suggestions? Please. I have no check engine lights on.I have given the car a tune up and oil change. ????
  • The basic FWD 3800 automatic used in the GT, GTP, and the V-8 model is probably the std tranny with a few beefy parts..If you have a heavy foot, you will pay the piper..Hey it's GM quality!!!!

    I have a 2006 GPGT, purchased 40 mos ago with 4300miles, Caddy tradein, paid 1/2 of original sticker..now showing 51k mi..

    A good car, not a great car, cruises easy at 80, supercharger helps high end, and low end is not a 3.8 feature.. My other ride is a 2010 Mustang GT w/track pkg built for play, however at 77 yrs old it is fun..
  • jja73jja73 Posts: 2
    Hi hoping someone can help. I have a 2003 Grand Prix GT with 95k on it and when I try to "punch it" acceleration seems to drop like a stone and effectively freezes around 4000 RPM mybe a little less. speed will pick when I ease up on the trottle and kick it up more gently. WTF? I really have no intention of putting alot of money into it. please advise
  • I just went through this. No engine lights or anything. It was my catalytic convertor. Cost me about $250.00 to replace. Now runs great!. The only way I found out was to have them drill a small hole in front of the cat and attach a pressure gauge . when the car was started it showed a lot of back pressure coming back from the cat meaning it was clogged. Then we did the same thing after the cat and the needle didn't even move. Meaning the muffler and the resonator were fine. Plugged up the holes, replaced the cat, and road tested at 100 m.p.h. . very smooth and lots of pick up. Hope this helps!
  • Transmission Problem. Sometimes when coming out of reverse and going into drive the tranny goes into neutral for a second or two then pops into gear and locks in. Cannot reproduce it. never know when it will happen. 98,000 miles on the car. Any body have any idea what to do about it?
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