Shift Kit

I was thinkin about buying a shift kit for my Gt and i was wondering will it help my 1/4 time any and how much. i have performance shift with the PCM and i know when i step on the gas it pulls harder when it shift. and if i get the kit will it pull hard even when i'm not driving aggressive. b/cuz i dont know to be cruisein with my girl and who heads jerking back when it shift. so please let me know. and also will i have to upgrade my transmission to HD part. C V joint ( half shafts)

off topic wut does ur car run in the 1/4 mile an wut do u have in int ??

I have a 02 Grand Prix Gt < and when i went to the Track I ran a 15.6 just with upgraded exhaust and K-and-N 15.6@88mph but now i Have DHP PCM and performance shift and 180 tsat and i was looking to get a shift kit and maybe down the line get that cartuning turbo charger or maybe a supercharger.

combined with your retuned PCM, a shift kit may make shifts too firm for your lady friends taste. It's all subjective, because each person is different. Retuned PCM's increase trans line pressure, and change the shift points, where most shift kits do the same mechanically, rather than electronically.

The biggest problem with a shift kit applied at the valve body like a Transgo is it is not a cost effective modification for the little amount of performance increase. To install one is a PITA. If all you do is drag race it might be worthwhile.

The biggest problem with a shift kit applied at the valve body like a Transgo is it is not a cost effective modification for the little amount of performance increase. To install one is a PITA. If all you do is drag race it might be worthwhile.

what about the stiffer springs that you can get to go in the accumulator? they firm up shift and it's very easy to get to/replace those springs...

what about the stiffer springs that you can get to go in the accumulator? they firm up shift and it's very easy to get to/replace those springs...

Good point and that is true. Wasn't he already complaining about performance shift. Tranny mods are great for the strip but not for overall driveability on the street. Just my two cents. :2cents:

Good point and that is true. Wasn't he already complaining about performance shift. Tranny mods are great for the strip but not for overall driveability on the street. Just my two cents. :2cents:
Plus the shock loads generated by these modifications can stretch the reliability of an already shaky trans.

Plus the shock loads generated by these modifications can stretch the reliability of an already shaky trans.

Quite true my friend. Probably a good way to take out the clutch splines which are shaky on both the 4T65E and HD versions.

I've got a transgo shift kit in my GP. Mainly for the 1-2 and 2-3 shift timing. The kit really helps out those crappy soft long shifts. You can just install those springs and save the rest of the kit for they day when you overhaul it.