TC locking it R

[storkerlovr]

im working on a 99 f350 with 4r100. it was rebuilt maybe 15k miles ago and it likes to lock up the tc in reverse and sometimes going forward. both ways at about 2-3 mph. and at that speed it stalls the engine in a second. and yes i know its loking up because i have a lockup switch in my truck and i know how it feels.
any ideas??? thanks

[FORD_F-350]

dunno for sure but if the computer isnt locking it. then everyone says if it locks in reverse usally the tc is on its way out.

[storkerlovr]

humm
if i remember it right, he told me that it kinda started doing that soon after it was rebuilt. but on the other hand it has a very hard life. 1 ton truck with 10 ft reading tool box bed. id say the truck has about 12 k on it most of the time lol

[Tyler]

I'd be calling the company that rebuilt it.

[storkerlovr]

yeah yeah i know, that the first thing i told him. but it was rebuilt like 2 years ago and it aint worth it. they just run around in 4 low when they are in the fields so it wolnt stall out

[ipz2222]

Search the forum. Over and over again, it's the pump. Crossleaks cause the tc to apply when trans is engaged.