Last post on Oct 16, 2013 at 9:32 PM
You are in the Pontiac Grand Prix
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Pontiac Grand Prix, Sedan
Jun 21, 2010 (3:40 pm)
I have a 99 GTP with the same problem. My Dad seems to think it could be a misfire in one or some of the cylinders. Or it could be a clogged trans filter or a transmission selenoid that is bad. The theory with the spark plugs is that the computer knows if there is a misfire and tries to adjust the RPM's according to engine load to keep the car going, so the computer will tell the transmission to drop a gear to raise the RPM's. My car only hunts/shutters (my engine RPM's go up and down very rapidly) under a light to mild engine load. Once the RPM's are up, it goes away. My car does it cold or hot. It just started to do it about two-three years ago. I am going to try to put back in the OEM spark plugs and change the transmission fluid and filter. See what happens I guess!
#3 of 11 Re: Same Issue [processed]
Aug 04, 2010 (7:46 pm)
"I have a 2000 Pontiac Grand Prix GT and is having same problems around 2000 rpms. What was the fix that corrected this problem.
#4 of 11 2000 Grand Prix transmission jerks
Aug 05, 2010 (10:18 am)
I seem to be having a similar problem, the car jerks at both low and high speeds usually on acceleration, hadn't really noticed the rpm. I hope someone can help us on this. I refuse to go to a GM dealer, they are full of crap and just extort money from you and the problem still exists. They don't know what is wrong with their own cars. I really like this car when it works, it has had many small issues that seem can't be resolved by anyone. You just have to keep driving and ignore until one day, I'm sure it will die. I considered taking it to a transmission shop, I decided to come here first and surely enough, there are others having the same or similiar problems with older models. GM has really tarnished their reputation and I probably will not be purchasing another of their products unless they give me an offer I can't refuse, Like free.
#5 of 11 What gasoline are you using?
Sep 21, 2010 (8:32 pm)
The gas station I had been using for years started selling a gas/ethanol mixture without posting it at first. My car started to shudder while idling as if it was stalling. I switched gasoline brands, used a fuel injector additive in the gas tank for awhile, and the problem went away. 2000 Grand Prix GP 3800. I was using regular gas.
#6 of 11 Tranny not working on D or 3
Feb 03, 2011 (6:49 pm)
I Own a 2000 Grand Prix GTP and the transmission began acting strange 2 days ago. It will not engage on Drive or 3rd gears but it does in 2nd, 1st and Reverse. It didn't give any signs of problems before this. I'm thinking that it could be the selenoid but don't realy know. Can anyone offer some assistance?
#8 of 11 Re: Tranny not working on D or 3 [feblesc]
Dec 07, 2011 (7:29 pm)
Its weird, because my Grand Prix GTP is doing the same thing right now. I don't know what it is. It will not engage on D, 3,2, But will on 1 and R. So what I did was Start on D and shift accordingly to 2, then 3 when going at faster speeds. It worked for now.
I do not know what to do. Then today when going 55, I changed it to D and it worked. But as soon as I stopped the Car will no longer go on D,3,2,1 But it will still work on R(revers). Have you solved the issue. I have a feeling it has something to do when changing gears or the transmission is not working.
Have any tips.
#9 of 11 Re: Tranny not working on D or 3 [victorsinferno]
Dec 08, 2011 (6:13 am)
What year is your Grand Prix? I can look in the resources I have to see if there's any information that could be helpful.
GM Customer Service
#10 of 11 Re: Tranny not working on D or 3 [victorsinferno]
Jan 12, 2012 (12:42 am)
probably already solved this problem but it sounds like it could be a timing issue.
#11 of 11 Re: 2000 Pontiac Grand Prix Transmission Problems...Help! [irishpuffman]
Oct 16, 2013 (9:32 pm)
Did you ever find a fix for this problem? My 2001 Grand Prix SE has the same problem