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Brett
I have virtually removed all mainshaft end play by eliminating all main shaft shims and the gasket. All the gears on the mainshaft turn together because they are splined. I think the spacer is OK because it is just a spacer between two gears that don't turn against each other more than the splines allow. My sleeve may have worn by hammering some when the main shaft was in full float mode with no load on the bearings. I have no clue how long this C ran in that condition.
I have at least 6 other spare gear boxes still together and in pieces that at one time or another sat with water in them. In spite of that it is suprizing to find that the guts aren't totally rusted together and gears, shafts and bearings are probably still useable.
Right now I wonder if it is worth the time to go back and pull the C back apart to remedy the second gear howl.
Two gears are meshing in second and both have to be good for maximum quiet. Third is pretty quiet so I'm thinking second gear on the main shaft is real culprit especially if it was used much in second with the floppy mainshaft. I hate to pull the pinion shaft and have to readjust it because I think it can't be adjusted proper if the ring gear and carrier is in the case. I did notice that when I replaced the axle seals there were more shims on the left than on the right. What I read is those shim stacks should be EQUAL? .
I guess its time to go back into it from top to bottom and make it as right as possible.
I got spoiled by how quiet the gears were in the 38 B Gary and I restored without doing more than changing the oil seals and oil in the tranny/diff case.
When this C tranny is as Quiet as possible I have 5 more to check out. A 39 B is next.
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