Thread: Shift kit needed?

Hey guys just wondering when exactly a shift kit should be installed. Right now I have a 2002 gtp with headers an ssic with a ported lower intake manifold and currently on a 3.3 pulley with 15 degrees of timing Kr free right now. Ran at the track here the other day and ran a 14.90 up here in Denver. I know off the shelf tunes they do some transmission tweaks and I haven't messed with any of the settings that Zzp set it to. Seems to shift perfect and doesn't hesitate but I guess my main question is what exactly do they do and would it be worth the time?

I know the transmission in my car has been rebuilt in the past but I can't imagine anything has been really done to it performance wise. Just would like to see it last a while and take care of it. Any advice is appreciated.

I tried setting it to 19 with a little race fuel in the tank and when I got half way down the track I could see some kr on my scan gauge. I had my 3.3 on. I only hit 2* and my afr was at 11.1. Wondering if when I put my yella terra 1.8s in will make a difference. What kind of afr should I be seeing? Also wonder if it's time to upgrade injectors. But I am planning to do a tranny fluid change and I'll put a shift kit in there for peace of mind for now.

It's sucks trying to make power way up here at almost 6000 feet at the track. Cars usually run a second slower unfortunately. Stock Gtps usually run low 16 very high 15s here.