Ok so I've been reading on the forums that a vacuum mod can make your car shift bad too,well mine was the 2 plug one but I switched it to the green painted one with only one hose,now I drove it and ussualy it has a kick when I toss it into reverse or drive but it didn't,it went nice and smooth,is that alright?? And when I drove it,it went 1-2 good but then shot up on rpms like a delay then shifted to third, know before I start tinkering with the screw to adjust where it need to be which way should I go? Any help will be appreciated thanks
The flare you have in your 2-3 shift is not from your modulator. Lets get some information: What is your vacuum at idle? What mods have been made to the C4? What mods to the engine? Is the transmission filled to 1/2 way between the ADD and FULL marks when idling in Park? How many miles on the trans? What kind of use? (drags, street and track, street only but hard use?) Do you have additional cooling for the trans? Does it go into gear and then back out and then in again or just slip going in?
Sorry for not getting back sooner just been very busy, i had switched it back to the 2 plug modulator so It won't keep doing that flare but after awhile it starts to slip into third if I do alot of driving. Engine is pretty much built to run 12's and im guessing this tranny is stock since its already messing up, only had it since 09 and I baby it so I don't drive to alot of place but I do race sometimes. It started to slip bad when I took it to the track, right when I'm getting close to the quarter mile run finish, smoke starts to build up. But when I park it, it stops. No leaks at all. I oh and I have a tranny cooler on it that's about it. And no once it goes into the gear it stays but if I try to drive it hard, and shift manually it won't do it so I just leave it in drive.
