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Old 01-11-2020, 04:37 PM
e39_touring e39_touring is offline
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Thanks for that info. I would think that unless either the shaft or the bore is tapered, the seal should seal as long as it's in there square.

My problem is I already replaced the seal and drove it in recessed, but I can't remember fully where the original seal was placed. I think it was flush with the guide tube flange, but I did so many seals from the RMS, to differential side seals, pinion seals, etc., I'm not 100% sure.

I'm betting, though, that my mistake that's causing the leak is that I didn't wrap the spines before putting the seal on. The shaft diameter where the splines are is a bit smaller than the i.d. of the seal, but I'm sure they still made contact even though I was aware of the danger and tried to be careful not to have them touch.

The good news here is I think I can test the seal before reinstalling the transmission by tilting it forward a bunch so the fluid level rises to the seal.
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