Wondering if anyone has any advice?
I have a TH-400 with probably no more than 120,000 miles on it. Although it still works fine, a rebuild is in order because 1: it's a project truck, 2: the last time I opened it for filter/fluid there were 2 metal chunks in the pan (about 3/16" slightly curved as if a shaving from something the size of 1/2" pipe) and 3: On sub zero days there's a "turbine" sound in 2nd until it heats up. My question is, when this tranny is rebuilt. Is it good as new or do they just throw in new friction materials? I understand that the main guts are reused - gears, drum, valvebody, etc, etc... But are there bearings/bushings/other things that are just "left in" (like when you swap a cam and the bearings stay in the block) so that for example if you kept rebuilding the trans every 150,000 miles by the time it gets to an aggregate of 900,000 it's going to be junk anyway - or can they just keep being rebuilt indefinatly?
Also, for long sitting periods, winters and the like. Anecdotally I've heard that auto trannys don't like long periods of sitting in the same position because parts of the clutch packs become dried out while others become saturated with fluid. Does anyone have any opinion on this? Are there any negative effects to long storage times?
Jim.
