Hey whats up everyone,
I need Help!!!
I purchased the Thrasher Shift Kit, for my
99 Grand Prix GT and can't get it to work.
The first time I put it in I used the stage 2
kit, didn't do a thing.
So I tried Stage 3 and it shifts a little guicker but does not jerk at all.
Then I took it apart looking for any cracks inside the accumulators - none.
What should I do? What causing this to not work?

i have heard complaints from people locals about those kits that they wont make an AWESOME difference, but does give a more quality shift. I still say one of the best things that could be out there for our cars is a Hypertech programmer. Im sorry the DHP looks liek a great deal and i give them props on there setup, but i cant see payin 450.00 or whatever and if i have to have something reset losing it. thats just me.