[jmantle]

Originally Posted by goinbroke2

Have a 1975 c4 with a broader performance reverse pattern valve body. Followed directions exactly (so I thought) I have p,r,n,locked, 2nd,3rd. Pulled the valve body and double checked all my springs/balls/grinding and everything looks like the diagram. Put it back in, the same. Pulled the valve body and put a stock one in and it works normal. Pulled the stock one and went through the reverse pattern one again, triple checking.
It appears it's in 1st and rev (tranny brake) but I don't have a tranny brake and didn't grind the hole to install one, but, it's acting like one.

This morning I went back out and installed the reverse pattern one and fired it up....I now have P,nothing,neutral,1st,2nd,3rd.

So now I have 1st but no reverse. I'm going to run it for a bit and make sure the oil level is good but if it runs 1,2,3...

Anything obvious I'm missing here? I'm not doing something right, I just don't know what. Had rev/1st which locked it, now I have no reverse and I have 1st...I don't know the circuits enough to know what that means.

Help.

Someone (Gary Lucier?) posted some links to a c4 build but of course I can't find them...

If it's locking up in the first gear position but the rest of the gears are normal, sounds like the high gear clutch is applying, as it would if you had a transbrake applied. Sounds like something is misassembled, I'd start by checking out the 2-3 shift valve.