OK, '00 f350 7.3 w/ 4r100. Just installed a BTS Valve body.

Usually warm, when I put it in reverse and give it gas the truck seems to 'bind', it will go backwards but slowly (like I'm riding the brake) and won't go above 1500 rpm.
Didn't have the problem before the VB install, any thoughts from any tranny gurus?

 

had similar problem with my ftvb. was a problem with the valve body, call brian and see what he says, i had to change mine out to get reverse to work right.