<VV> Diff Seal Question

[Mike McGowan]

 Mark, check the fit of the shaft and seal; maybe somehow you have the wrong parts that don't mate.  If the seal and shaft are good then check the pilot bushing in the crank.  If that is not tight then the input shaft will beat the seal to death.  
Using two seals requires a shaft ID that is machined for that, which is a lot of work to replace.  If one seal doesn't work, why would two be any better?  No good twice?
Oil level should balance through the lower hole.  Make sure it's not overfilled.
--Mike Mc
   
Date: Mon, 13 Nov 2023 07:29:11 -0500
From: "Mark Plucenik" <markplucenik at verizon.net>
To: <virtualvairs at corvair.org>
Subject: <VV> Diff leak
Message-ID: <001901da162d$01bf13d0$053d3b70$@verizon.net>
Content-Type: text/plain;    charset="us-ascii"

I hope you can help with my problem.    My car is a 1966 Corsa , 4 speed and
I have just recently replaced the differential pinon seal 3 times now and it
still leaks 'allot".  This is the quarter size seal that goes inside the
through-out bearing snout , C495. Pulling this drivetrain is allot of work.
I do not see any cracks or  problems with the differential snout  and I
polished the sealing area of the input shaft .  I thought it all looked
good. 

 

Question,  would it be possible to use 2 seals instead of just the 1?

And if I used 2 seals would you still use the special split washer in front
of the seal/ seals?

Also this weekend I meet with a couple local club members about the problem
, one is a true Corvair mechanic, very knowable.  He recalls there is a
certain way to fill the trans rear and differential to help avoid leaks.  He
could not recall which way but it's important to fill either the rear first
or the tranny first.  I filled from the transmission only thinking the
shared fluid would self-level.    Can you shed any light?

 
Again, Thanks, Mark