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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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Replying to: montana_cat (Nov 08, 2007 3:38 pm) please help 
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Replying to: karrick (Nov 30, 2008 9:22 am) Sorry to be so long in replying. I think I must have been one of the lucky ones. Since rob94 posted the idea of the upgrade, others have asked where to find it and it seems to be a mystery. My car supposedly had the most current software, but the mechanic at the garage called someone in Detroit. They uploaded a new, but unreleased version on my car. Since that time, no one else on here seems to have been successful at having someone find it. My suggestion to you is to print this stuff off and take it to a dealership. Unfortunately with the shape GM is in right now, you may not get much help. I hope you get your problem fixed! I feel for you. |
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| About a week ago my 01 grand prix just stopped shifting into overdrive. Im wondering if it is the speed sensor. Other than that it shifts good. | |
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I have a 1999 Pontiac Grand Prix, 3.8 V6, supercharged. When the car warms up a little, I get a ticking noise somewhere around the trans pan/engine pan area. When I drive it goes away but when I coast down to idle the ticking starts. When in drive idle it ticks, when in neutral or park idle it ticks intermittently. 
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Replying to: jb1987 (Feb 02, 2009 1:48 pm) I searched the net to no avail and the folks at the local shop were clueless. Of course the Tranny/GM folks say bring it in so we can diagnose it for you... $$_^_$$ they say! Figured I'd try a few simple things before I'd let them to hack on it. Anyway today I did one major thing by replacing 1 gallon of the tranny fluid which puts me at 50% fresh fluid, definitely a noticeable difference and seems shifts fine now. The fluid I pulled was almost brown in color, versus the nice red/clear new stuff, pretty quick & cheap at $12/gal. Figured I'd do this once more but 6 quarts next time more times to get more fresh in it. I have a 1.5 gal vacuum pump which easily sucks it out in about 10minutes, then replaced it with new, I calculated that after the second flush, I'd be at 87% pure tranny fluid, if needed I’d do it once more with 6 more fresh it’ll be at 97%. Ya, I know I should drop the pan and replace the filter, but I don’t have the time and weather kind of sucks, figure I’d do it later this spring. Phase one, $12 bucks and a few minutes of my time and it seems to have done the trick. How I wish I had a  manual transmission! Hope this helps. |
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Replying to: jb1987 (Feb 02, 2009 1:48 pm) Thanks
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Replying to: Thr0ttleJ0ckey (Feb 11, 2009 9:54 am) |
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| My 2000 SE was shifting hard after a newer tranny, new valve body and pressure sensor....more money than I wanted to put into the car...anyways it was still shifting hard. I had the diagnostic hooked back up and took it for a drive...it seems as though the torque convertor is sticking at times. My gas mileage sucks now. Anyone else have this problem?? Is it worth fixing?? | |
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my tranny just started overheating friday it has never done this before i thought it was the fact that i had barely any coolant in it so i filled that up and put some tranny fluid in it and it still overheats it overheated to 199 friday night. what would cause it to do this and what should the normal temp be?
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Replying to: coblur (Jun 26, 2007 8:53 am) Take it to the shop. Let them look it over. Warning its not cheap to fix. |
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