First off i would like to apolize for putting this in the wrong section but i have a TH400 and could not figure out what section of the forum this should go in - i am sure someone will tell me.
Anyway, i recently swapped my trans out for a rebuilt one, the person who did the rebuild has done about 20 for a friend of mine and he never had a problem.
Mine overheated after only a few hundred miles, the next day the atf was dark and i had a hard time getting it out of park. It was doing weird things while driving home the night before, like if i was on the highway and just let go the gas pedal a little it sounded like the trans was downshifting, almost like it went back to second gear or something, but it did not actually slow down, then if i gave it just a little gas it would go back to normal.

Anyway, i called the guy, he said it was under warranty as long as i did not mess it up while installing it so i brought it back to him and prayed a lot (seriously, i am not afraid to say that. On the veggie burner forums it is like politically incorrect to say that kind of thing, that's one of the reasons why i ditched them all).
So i called him today and basically said he could not really tell what went wrong so he would just fix it under warranty so i am evidently out of a MAJOR jam.
The thing that confused me though is that i was thinking the whole thing was fryed and would need a full rebuild again, but the guy said he just found a few parts that needed to be replaced, something about one of the planetary gears and maybe part of a clutch. It did not sound like he was going to have to rebuild the whole thing.
My concern is that other parts could have worn out due to the excessive heat and cause more problems down the line. Any input on this? transmssions are not my stong point, trying to get some info.
thanks!
Paul

My concern is that other parts could have worn out due to the excessive heat and cause more problems down the line. Any input on this?

Not that can't be caught with a visual or device check. No.

Frictions, for example, when under proper pressure are as good at 100,000 miles as they are at day one. Same thing with steels, bands, etc.

The reverse is NOT true, however.

When you have a good friction, all is well.

When you have a bad friction or steel, you don't just need a new one, you need to address the pressure issue that burned it to begin with.. If there were no low pressure condition, it would not have burned. The same condition will burn new parts also.

In short, if he's any good. He can tell with a visual/device check what's potentially been affected.

If he's no good, he won't bother to look.

it is quite possible that it only needed a few parts 400's are not usually parts eaters

Moved it here as this is closest to TH400 I could find

The planets and the clutches are at opposite ends of the trans. Don't make sense. :confuzeld Sounds to me like when he installed the front drum it did not go in all the way and missed bottom clutch in direct drum. A failure this quick is almost always rebuilders fault.