330GTC Transaxle Seal Replacement

Hi Bob, I don't think this will be possible with transaxle still in the car (unless anyone knows better?) because the left and right seals are fitted from the inside of the cover plates. You will have to split the rear cover joint in order to release the flanged cover plates and this is much easier to do on the bench, not to mention reassembly which should include re-shimming to set up the crown wheel properly. Incidentally I think the new seals will be handed to allow for rotation.
Good luck,
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I started out trying to do it in the car but gave up when Collin gave me the same good advice. I am glad I did it because I ended up needing to replace the side and front cover gasket and the shift rod seal. I don't think you need to re-shim the differential, just don't mix them up side to side and don't damage them. I also don't think the side seals are handed, at least mine were not.

The removal can be done by yourself and is about as difficult as pulling a VW engine, but the installation really needs two people to align the drive shaft splines while wiggling it into place.
Removing it also gave me the opportunity to inspect the innards, clean out the sump and paint the case.

I did a write up on the other site if interested. Search on my name or the word transaxle.

 

Both output seals can be serviced without removal of the transaxle, but require removal of CV axles and differential side plates. Service of input seal would require removal of the transaxle (or engine + torque tube), so it would be advisable to do them all (and any other related service) with it out.

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