I could never get the 2 to 3 upshift at anything over 4k rpm, last week I installed (on jackstands in my garage) roe racing's all steel master cylinder and slave. The kit also includes a aluminum flywheel and centerforce clutch disc. WOW!!! what a beautiful difference in the shifting. I no longer hear "nice truck to bad you don't know how to drive it" when occaisionally showing off that bad a$$ viper power.