Just had transmission rebuilt. Tranny shifts fine in all forward gears. When the truck has been driven for about 30 minutes....reverse lugs. It only lugs when tranny is warm. The harder i push the skinny pedal down..it will pull out of the lugging. I am at a loss here. Have looked at a lot of posts about transmission lugging but Im clueless.
Seems like a whole bunch of things could cause this: torque converter (which is new) shift selonoid (also new) low fluid (its good) valve in pump (possibly) fuel filter, pcm???
Dont really know where to start??
any suggestions would be great....dont really want to pull the tranny and put more $ into it for guessing.
Thanks in advance