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Sedans Pontiac Grand Prix Pontiac Grand Prix Transmission Problems
217 messages, Last post on Nov 17, 2009 at 6:18 PM
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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))))
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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.
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Replying to: redclownn (Jul 22, 2009 12:28 pm) 
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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! 
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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. 
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Replying to: pohodar (Jul 20, 2009 7:46 pm) !#$#%$% not very happy about that but works fine now...
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Replying to: bcarson1 (Aug 07, 2007 5:50 am) 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? Thanks
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Replying to: redclownn (Jul 22, 2009 12:28 pm) |
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Replying to: gp1998 (Aug 31, 2009 8:39 am) |
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Replying to: lukas18733 (Jul 13, 2009 4:42 am) |
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