Last post on Aug 22, 2013 at 12:43 PM
You are in the Pontiac Grand Prix
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Pontiac Grand Prix, Transmission, Sedan
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#486 of 498 Re: 2005 Pontiac Grand Prix GXP [2007gxp]
May 22, 2013 (11:34 pm)
I have a 2007 GXP with 64,000 miles. I've already replaced 3 wheel bearings/hubs and now the 4th is bad. my back tires even after an alignment don't seem to be right since the tires wear more on the inside. I never use my tapshift.... not even to slow down. I went with ceramic brakes for less wear on the expensive rotors. As of 2 months ago the transmission has been acting up. sometimes when it downshifts from second to first the whole car vibrates. here and there when im going to take off it will hesitate and slam into to gear and take off (did it for 2-3 days and hasn't since). biggest concern now is when I am not accelerating its starts to make a decent noise level raspy sound. when I hit the gas it stops. from what ive found out doing some research GM used the same transmission for the v8 as the v6. poor idea. the car is basically destroying itself. Bigger wheels with molded spacer is a lot of stress on wheel bearings/hubs (which are also the same as the base grand prix with small wheels. the v8 is abusing the transmission. the gtp offers tapshift because it is the same tranny. sad part is I love the car and it is good looking. but is just a very poor design and not worth anything near what I paid for it. I was looking at a car and the GM dealership offered me $7,000. I wanted to throw up. Guess im keeping it and dumping more money in it. im going with a Bmw next lol
#487 of 498 Re: 2005 Pontiac Grand Prix GXP [shawniboyy85]
May 23, 2013 (5:47 pm)
I would like to share a little information with everyone on here that I have discovered through research & having some inside contacts. GM began designing & producing this model during a very unstable economic time for the company (has anyone forgotten the government bailout?). If you will, imagine this scenario; GM is going broke, cars are not selling. There are large inventories of components sitting in warehouses rusting & costing them money. Then a light bulb goes off in some geniuses head, "hey, why don't we take these components we have sitting in warehouses & use them to produce a vehicle that we'll call premium in every way including the sticker price, but use all these components that were made & designed for another vehicle . So Mr.genius proceeds to map out this plan on paper, which lets be honest looks really impressive to the corporate blood suckers sitting at the top of world headquarters drinking their lattes. It is a inexpensive vehicle to produce, we'll throw a V8 in it, make the brakes look really cool & use some other spare parts we have in our inventory for the suspension. Then we'll market this baby to middle class buyers that are bored with the same old family grocery getter sedan. We'll mark the price up because we are going to call it a premium model & our profit margin will be outrageous. Woo hoo, were smarter than we ever knew! This is the sad but true truth of why these cars are nothing more than scrap steel & aluminum. GM obviously suffered from not being able to see possible long term issues with this idea, which is very common within the auto industry. If GM were to admit accountability for this, which beyond a shadow of a doubt they are, how would they ever pay back the money they owe to the government? The bad press coverage alone would potentially cost them 100,000 or more customers, so we GXP owners that might reach 10,000 to 15,000 in the few years they were produced are the unwilling victims. My numbers may be low or high, but you get the basic idea. You will never find one of these vehicles that do not have these problems, but there are a few things you can do to help prolong the life of the transmission. Of course all of them will be at the cost of your pocketbook. Install a quality transmission cooler, these transmissions run extremely hot & the factory coolers are insufficient at best. Remember when it comes to transmissions, heat is the number one killer (in normal conditions). If you are already having shuttering or shifting problems, this will not cure your trans. It is mostly trashed by that point & rebuilding or replacement is the only option unfortunately. Consult a mechanic that is familiar with our specific model, inquire about replacing the motor mounts to something less rigid. This rigidness could be a major contributor to why the torque converter seems to self destruct. I wish everyone the best of luck!
#488 of 498 1996 GTP Transmission Overhaul
May 28, 2013 (2:21 pm)
On Friday after leaving the Indy 500 Carb Day events I was driving the short distance home and going into third gear I felt a noticeable slip in my transmission. This has never occurred before. It then drove fine. On Saturday I left to go to the grocery store and once again I felt the slip. I immediately parked it at home and took it to Edwards Transmissions today.
The details of my vehicle is it's a 1996 Grand Prix GTP 3.4v DOHC. The previous owner had a few minor performance parts installed.
I have received the details of my transmission issue, which thankfully is not a total failure, but internal components are compromised. I decided to have a total overhaul at the very nice price of $1600. I could have paid the $800 to fix the issues, but while they have it out, I figured lets make sure that it is at peak performance.
I was clocked 0-60 in 4.7 seconds around six months ago, so my hope is that a tranny overhaul will vastly increase the performance of this car that I love so much.
Any ideas on how my cars performance may be enhanced with a complete transmission overhaul?
#489 of 498 Re: 2006 Grand Prix 3.8L V6 Transmission Problem [dblake78250]
Jun 12, 2013 (12:25 pm)
Wow I am in the exact same boat as you and your wife. My car was recently making loud sounds as my car shifted from first to second gear, and all of a sudden it went out on me on my way to work. I cant drive my car in the normal drive gear but I can in the lower gears.
Is there anything that your and your wife did to get compansated or any help from GM?
#490 of 498 Re: 2006 Grand Prix 3.8L V6 Transmission Problem [rmay0405]
Jun 12, 2013 (12:55 pm)
Good luck to you. I spent over $4,000 and had the car back at the dealer 3 times and the better part of a month without a car before it got fixed (for now). All I got from GM was "I feel your pain".
#491 of 498 Re: Transmission Needs Replacing [richsolnuv]
Jun 12, 2013 (12:59 pm)
The problem (for now) ended up being a bad valve body in the re manufactured transmission that they installed. There was no charge to fix it, but they had it another week and I had spent over $700 to have the motor mounts replaced when that wasn't the problem.
#492 of 498 Re: 2006 Grand Prix 3.8L V6 Transmission Problem [rmay0405]
Jun 13, 2013 (12:35 pm)
I updated my original post on May 08, 2013 #481. We've never had the car serviced, nor has the problem reoccurred. I manage my fluids myself, changed the oil last weekend. The tranny fluid looked in good shape, up to the top of the level. My wife wants to not press the issue, and get rid of the car altogether, before it starts trouble again, and breaks the bank.
#493 of 498 Re: 2005 Pontiac Grand Prix GXP [bbaisden]
Jul 28, 2013 (9:50 pm)
Amen brother! Of all the bs talk from customer service as to what could be wrong with my 06 GXP Tranny, you sir sound like you have the ultimate answer.I just turned 80k on mine and Its time for an import! No more Garbage Motors!Thanks for the 411.
Aug 06, 2013 (3:53 pm)
I have been reading the Pontiac Grand Prix GXP transmission posts with interest and decided to post hoping someone from Gm would see this and respond, or maybe someone could tell me how to reach some one in authority at GM. I just had my fourth,that's right fourth transmission installed in my GXP in 89,000 miles.The dealer who rebuilt the other transmissions "only" charged me $1621.00 this time it was out of warranty by about 18 days and could not be covered under the 100000 mile ,3 year guarantee. Last time it was $1850 or so. The time before it was only $ 500.00 that one lasted approximately 2,000 miles. When i picked up the car it had many new scratches and a nice new ding. The heads up display also did not work. Back to the dealer today they tell me the problem is inside the dashboard and not related. WhenI called GM I had the pleasure of speaking to someone named Tommy who sounded like he was stoned. He could not string together a even half coherent sentence had no answers just told me my car was out of warranty. Anybody have any Ideas, could really use some help.