Was in the middle of a mind blast today and upshifted from 3-4 at a little above 6500 rpm in 3rd right before it bounced off the rev limiter. What in the tranny is the first to break from high rpm shifts? I've got a fully built tranny but the fluid hasn't been changed in a pretty long time and I'm beginning to worry about something going out soon. The 1-2 shift solenoid has already thrown 2 codes.

What do you auto guys check for before rebuilds?

 

The most comon failure I have seen from HI RPM shift is the 3-4 clutch failing though if the trans is built properly this realy wouldnt be and issue. Shift solenoid code could be just that simple a sticking or other wise bad solenoid ,Whats the number of the code .

 

i don't know the code number but it just said "1-2 Shift Solenoid" my buddy says.

sometimes though, the 1-2 shift is really hard and sometimes it's soft. what do you think?

 

There could be some isue with the solenoid try and get that number there are several codes dealing with the 1-2 solinoid for electrical and mechanical and code explain the shift differential too ,

 

How long is a "pretty long time" since a flush and filter change? If you have accumulated some crap floating around, the filter can clog causing lower pressure and junk can get into the solenoids. It might be worth a flush & filter if you have some hard miles on the car.

 

the tranny has close to 20k on it. what do you think?

 

6500 RPMs is high? Hell, I have a bone stock 100,000+ mile car and that's what I shift at like, every day. Is that bad?

Keep in mind, I didn't even know our trannys had solenoids.