heres the car info, 1992 sl500, 722.3 transmission 100k miles
last year the trans was slow going into reverse, this winter i changed the fluid
{bad idea} it went backwards three times after that reverse was gone.
after reading about the b3 piston seal failures and accompanying friction plate wearing i decided to drop the trans , replace the seal and frictions, and reinstall.
upon removing trans and dissasembling the seal was ripped and frictions were toast. new seals new frictions and back up.{why not rebuild the whole thing? the rest was in really good shape, and while going that deep for the b3 didn't scare me, the thought of delving all the way was more than i really wanted to commit to. i could have brought it and had a shop do it, but this gem of a car is starting to exceed the money to enjoyment factor, and i don't wish to marry it !}trans back in, start it up, and a loud thumping banging noise commences, then goes away after a few seconds...put it in the gears and you can feel it go into gear but it doesnt move unless you reaaalyy rev the car{best way to describe is if you have ever had a drag car with a high stall converter, similar} well i thought,I didnt engage the converter properly, it bashed the pump gear and was moving from the fluid being pumped from the secondary pump..you could also hear fluid gurgling when you shut the car off.
so out comes the trans pull the pump, dissasemble, and nothing...no marks of something hitting nothing broke, zero, not oneclue as to what went wrong...
do these cars have to prime the system? it ran for probably a minute, then i had tried it again with the same result{didnt let it run much more than that do to fear of something beating itself to death....} now without a clear cut screw up on my part i have picked up a trans from a 92 with a 115k on it, ran when they pulled it...my theory was to find a broken pump gear, swap the pump from the boneyard unit and reassemble and install my original unit..but now without something obvious im thinking of putting the used unit in and getting it mobile...unless you guys have something that i can look for?? thanks for any ideas...