Russ K need help

[josh mcclelland]

Russ I am working on a 98 c5 w/ 408 twin turbo, automatic . Trans will not shift when commanded. Car has built trans. I have lowered 2-3 rpm to 5500 and it still shifts 6300-6400. I am new to hpt. i have not tried zeroing mph table. On log 01 frame 2800 1-2 shift occurs at 40 mph and 6375 rpm,2-3 shift occurs 76 mph and 6332 rpm. On frame 1750 2-3 occurs 78 mph and 6366 rpm, frame 850 1-2 40 mph 6391 rpm, 2-3 77 mph and 6388rpm. Car acts like it is on rev limiter above 6100-6200, but rev limit is set for 7000 rpm. can't finish tune w/car acting like this. thanks in advance Josh.

[josh mcclelland]

I found the start up rpm chart rev limit 6200 all the way across the table to 284 degrees. oN trans shift wot table and part throttle table #'s were not the same in 100% column , So I think this will cure problem



Thanks Josh