C4 help needed
 

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...

Re: C4 help needed
 

Check out Class Racer Builds pg2 C4 build by “West Coast”

Re: C4 help needed
 

Thank you! (I knew somebody knew where it was, lol)

Re: C4 help needed
 

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.

Re: C4 help needed
 

Jay has a video addressing installing his manual VB kit. His products are top notch..so double check installation procedures. https://www.youtube.com/watch?v=8OrT9JcNvPQ

James Boyce (West Coast) also has has a complete c4 build under Class Racer Builds Section..its at the top of page 2... easy to find...good luck!

Re: C4 help needed
 

What do you need a reverse pattern , Tbrake valve body for , if I might ask.
The trans seems the work, so why not just buy a TransGo manual shift for a hundred buck and be done with it? Sounds like you're a glutton for punishment LOL

Re: C4 help needed
 

Ummm, just asking for a friend, wasn't there an "issue" with imitation Made-in-China Broader Performance valve bodies recently?

Re: C4 help needed
 

Only the junk sold by Summit and others. Jay does not sell through any of the mail order houses, only direct.

Re: C4 help needed
 

OP did not say where he purchased the VB.

Re: C4 help needed
 

Yes, in his "class racer build" thread he had mentioned getting a package delivered from Broader Performance.

Re: C4 help needed
 

Thanks guys, I've been busy getting 3 mud trucks going and looking at more property in another province. Busier now than before I retired!

Billy, yes there was, but this one came directly from Broader.

Mark, "glutton for punishment" I thought by driving a fffford, that it was self evident??

I haven't even had a chance to look at the video again. However, after assembling it, I had P,R,N,locked,2,3 then after going over it again I have P,N,N,1,2,3.
It HAS to be something I'm doing as a casting flaw or grinding in the wrong place would be consistent. In this case, things are changing just by my pulling apart and reassembling.

I stuck my old valve body in that has a shift kit already and all gears work fine. The obvious question is why not leave that in and run it this weekend, the last race of the year? Because I'm having fueling issues as well now. Don't want to get to the track half assed prepared, setting myself up for failure. I have to pull that tank and install a cell over the winter.

So, when I get a break in the workload (doing a fuse panel on my 86 mustang right now) I'll get back into it. (still working on a mud run video for my off road youtube channel as well.

Re: C4 help needed
 

When ever i have these kind of in depth technicle issue, I usually step back and go back to the basics of trouble shooting. Did you do air checks? this test ever thing after the valve body, like seal ring. Tefon seal rings are usually hard to check with air. I some times I think I am to smart and read into things that are writen and not read what is auctully writen,this also applies to watching a video and your mind hears something totally differant than what is said. This happens more than i woud like to admit. So be like a child that knows nothing about it and be a sponge and soak it in. so basically forget what you know temporarily. I always bounce things off other people that are smarter then me when i get stuck in my thinking Brian can attest to this haha. And this is why you are posting here. All 3 of my trans have Broader valve body kits. The first two were the do it your self, which he doesnt sell any more. the last one was the one with the half of the valve body with the kit which is the one in the video i did. I have not done a trans brake valvebody yet. let us know when you fix it, we all will learn something.

Re: C4 help needed
 

" read into things that are written and not read what is actually written" We might have a winner! LOL!

Dad always told me "learn to take a break, don't work until you quit" which is quite appropriate right now. Even had a guy about 20 minutes ago see me in a store and ask if I'm going racing this weekend....had to say no but of course got me thinking "what if I just put the other valve body back in"...STOP IT! lol!

Definitely have to start at the beginning and as you say "be a sponge and soak it all up". I'm not a transmission guy, I'm a " I can do that or figure it out as I go" type of guy. In this case I have to go back and figure it out.

Re: C4 help needed
 

Was at a car show this weekend held by Ricky Rood performance transmissions, talked to Ricky for a bit and just pulled the valve body out again. I'm going to bite the bullet and let him go through it. Sometimes you just have to let the professionals look at it, LOL!!

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