700r4, only reverse and 1st
 

So to start with, I've converted over to a 700r4 that is a Facebook Marketplace rebuild special. After a new torque converter and proper fluid fill, I only have park, reverse and 1st. It won't shift up. I just put a pressure tester on it. So cold, about 800rpms, I have 60psi at idle and drive, and 90psi in reverse. Is it like a stuck TV? Or did I get screwed over on the rebuild? TV cable is adjusted properly, governor isn't sticking nor is the plastic gear bad.

Re: 700r4, only reverse and 1st
 

pull on the TV cable with the vehicle idling
Reverse pressure should double, or close to it. Proves the TV function
Acting like the second gear apply band length isn't correct.
It could be lots of other things.
Start there. If you can contact the builder, he should help?

Re: 700r4, only reverse and 1st
 

You need to make sure the manual shift linkage has not fallen off the valve on the valve body which requires dropping the pan to have a look. Above and beyond that MULTIPLE things can cause it. You can also check that the band is sitting properly in the anchor pin while the pan is off. if the band is NOT then when it goes to engage it just moves off to the side instead of clamping and shifting into second.

Re: 700r4, only reverse and 1st
 

Band on anchor pin. I'll have to Google to see what you're talking about. Pics would be helpful.

Re: 700r4, only reverse and 1st
 

There's some pics down a ways in this thread........https://67-72chevytrucks.com/vboard/...=488772&page=2

Re: 700r4, only reverse and 1st
 

I see the pin your referring to in the thread. Should I be looking for it being stuck or something?

Re: 700r4, only reverse and 1st
 

No, the pin is the 'anchor' point for the band to stay put. Then the servo/piston pushes in on the OTHER side of the band and causes it to clamp with force around the forward drum. This happens in second and fourth. BUT.....if they missed the anchor pin, the band could possibly be just sitting there loose on the one side.
If I remember correctly, with pan off there are a few small gaps towards the front where you can actually SEE the BAND. You can use a small screwdriver to see if it's moving around loosey goosey. The anchor pin CAN NOT be accessed without dropping the VB.

Re: 700r4, only reverse and 1st
 

Thank you. Looks like I have a mission this weekend.

Re: 700r4, only reverse and 1st
 

Between now and then you can read this thread. Lots of good photos and information.

http://67-72chevytrucks.com/vboard/s...d.php?t=634121

Re: 700r4, only reverse and 1st
 

Quick update, I've been super busy and haven't had time really. But I did check one other thing, at idle it's 60psi in park. I pulled on the cable by hand and zero change. So is that a definite TV stuck, or means my tranny is trash?