Truck goes in reverse, barely moves in drive

[Backpayne]

I'm sure this th400 is toast, but wanted to ask first. As stated in the title, my c10 moves in reverse just fine, but if I shift to any forward gear I can rev the engine but it will just crawl forward. Is this a sign that the bands/clutches are toast?

This is a th400 I tried to rebuild for fun. I have a spare in good condition so I'll just swap them.

[68 P.O.S.]

Check your fluid level. If your trans is low on fluid it will do this as well.

What kit did you use to rebuild it?

[vince1]

Here's a schematic.

http://www.tcsproducts.com/media/1/T..._Nov2012_1.pdf

Many years ago the TH400 in my 77 Jeep Wagoneer failed. It was because of a worn reverse band. Is the other band for forward gears?

[Ironangel]

Originally Posted by Backpayne

I'm sure this th400 is toast, but wanted to ask first. As stated in the title, my c10 moves in reverse just fine, but if I shift to any forward gear I can rev the engine but it will just crawl forward. Is this a sign that the bands/clutches are toast?

This is a th400 I tried to rebuild for fun. I have a spare in good condition so I'll just swap them.

If your looking to get rid of the bad 400 for cheap I'd be interested...

[Backpayne]

Originally Posted by 68 P.O.S.

Check your fluid level. If your trans is low on fluid it will do this as well.

What kit did you use to rebuild it?

Fluid level was good. I have removed the transmission and will be replacing it with the known working transmission.

Originally Posted by Ironangel

If your looking to get rid of the bad 400 for cheap I'd be interested...

It's a BOP th400, and shipping wouldn't be worth the effort.