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Shift

G

GTP78

New member
Im not sure if im in the right section but I will try. I have a 99 gtp supercharged , automatic(just got it) when it shifts from 1st to 2nd its shifts at about 19mph but when it shifts from 2nd to 3rd it doesnt shift till between 46 to 52 mph. is this right or do i have transmission problems. Any help would be great.
 


under "heavy" acceleration first gear will shift around 45ish, second gear shifts around 85ish and 3rd gear won't shift into OD on a stock car....
Under light accel, it is hard to say. Depends on throttle position and incline.
 
Thanks guys, sounds like it is shifting normal. Just curious since its my first S/C and fist Grand Prix.
 


normal throttle the car will shift from 1st to 2nd around 10-20 mph and from 2nd to 3rd a little after 32-35 give out take some. Then hit 4th gear around 45+
 
sound like you lost 3 rd gear, had the same problem myself. 3 rd should lock up around 30 to 34 mph. so if its not shifting till 43 or so, your shifting into over drive aka 4th gear.

when you are going over 50 mph, drop the shiftier into 3 rd gear, if the rpms don't jump up, you lost 3 rd.
 
scottydoggs

I just took it for a drive I hit about 53mph put it down in to 3rd and it jumps from around 1500 rpm to 2500
rpm.
 


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