<VV> Differential pinion adjuster O-ring

Mike McCrae mmccrae6 at cox.net
Mon Mar 21 17:47:49 EDT 2016

The manual tranny and diff are supposed to share fluid  and maintain a 
common level.
Make sure your gasket between them matches that hole in the center bottom.

Mike McCrae

-----Original Message----- 
From: Doug Mackintosh via VirtualVairs
Sent: Monday, March 21, 2016 2:37 PM
To: Virtual Vairs
Subject:  Differential pinion adjuster O-ring

Does anyone know what happens if the o-ring is missing from the differential 
pinion adjuster? This is a 4-speed manual transaxle.
I just finished reassembling the transaxle and installing it on the engine 
when I discovered that I did not install the new O-ring. As far as I know, 
there is no o-ring on it at all.
It looks like a small amount of oil may seep through the threads until the 
oil levels in the transmission and differential matched. I am estimating 1/4 
inch between the bottom of the transfer hole (between the transmission and 
differential), and the bottom of the pinion adjuster threaded hole. So the 
transmission may drop 1/8 inch and the differential rise 1/8 inch after a 
long sit. Then during operation it should pump back to the transmission 
until proper levels are restored when it starts running through the transfer 
Even though it seems fairly inconsequential, I will probably try just 
draining both units, pulling the transmission back off, removing and 
reinstalling the pinion adjuster ring (with the o-ring this time) and 
Any thoughts? -- Doug Mackintosh Corsa member since 1996 Corsa/NC member 
since 1996, Virtual Vairs member Corvair owner 1969-1971 and 1996-on
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