Well I have a 2000 M6 Z28, i have full exhaust, intake, 4.11 gears. I have had my transmission rebuilt, and new master cylinder and drill mod. My problem is that like a week ago i went to speed world and ran my first actual 1/4 mile run at a strip. it went pretty good, got a 2.1 60' and 13.6sec 102mph 1/4mile, not to shabby for first time ever. but heres my prolem, car launches sweet. 1-2 shift beautiful, same for 2-3, but on 3-4 it doesn't go into gear right away, you gotta give it a second, and then its really tough; then the pedal sticks to the floor and can't shift at all, but by the time I get to the turn-around im able to get it in gear, by the time i get my time slip its pretty much normal. city driving is no problem and it shifts fine. so i'm thinkin its my slave cylinder cause that has never been replaced, although pretty much everything else has..... i goto UCF and was wondering if anyone from orlando knows a good place to get my car checked out. I dont really have any tools so it would be hard for me to do anything really on my own, maybe bleed it but i would probabbly do a shitty job.

 

you can try Vinci.

Vinci Hi-Performance
Maitland, 32751
Local phone: (407) 478-VETT
Toll free: 1-(866) 462-4500
Fax: (407) 478-8389
http://www.vincihighperformance.com/

 

It just needs to be blead.