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Update:
Disassembly of the B3 piston revealed a torn lip seal. Picture is included with this post. I’m beginning to think that my reverse failure was the result of this lip seal failing, not worn friction discs. I would think that worn discs would result in reverse slowly getting weaker and weaker over several months. With a failed seal it seems logical to expect a more immediate failure. My symptoms were a slow advance of weak reverse, and then immediate failure.
After lots of reading and thinking, I’m still unsure just how much rebuilding to do. At a minimum, I’m planning to overhaul the B1, B2, and B3 pistons with new seals, and of course replace the B3 friction discs. I’ll also replace the front side shaft seals.
My dilemma is whether or not to open up the small end (output shaft) of the transmission. Doing so would allow shaft seal replacement and a check/rebuild of the K2 assembly. I’m less concerned about the shaft seals—If I don’t replace them and they start leaking, they can be replaced without removing the transmission.
The K1 assembly can be checked for wear as per the FSM. Haven’t done that yet but I will.
So, the real question I’m facing is how likely is it that the K2 assembly requires servicing? I’ve both heard and read that the K1 and K2 assemblies have a very long life.
Anybody have a feel for the likely condition of the K1 and especially the K2 assemblies?
Thanks for reading.
J. M. van Swaay
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1994 E320 Wagon, 230,000 miles
1995 E320 Sedan, 106,000 miles
1994 E500 Sedan, 79,000 miles
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