<VV> Gear lube level problem
BobHelt at aol.com
BobHelt at aol.com
Sat Jul 25 09:33:10 EDT 2015
What you have stated may very well be true and thanks for your comments.
But unfortunately you have change the subject of discussion. You have
referenced the Early model Corvairs (and '65) that came with that tag located at
the tranny filler port.
But the subject was different from that. We were talking about the 1968
transaxle that did NOT come with a tag like the EM's. And the LM 4-spd tranny
is an entirely different one from the EM's. In fact no references were
made at all as to checking and filling, except a general one in the SM. So if
someone were highly knowledgeable like you, the checking and filling
procedure is a snap. My hat is off to you.
But for the average Corvair guy, it would be a big surprise to find that
the lube checking holes are at different levels. And maybe a big surprise
too as to which one is at the lowest position in the transaxle.
And so the dilemma as to which one to use for determining the correct lube
level. Should I underfill the tranny or, over fill the differential???????
Also comes the question as to just why Chevrolet didn't make an effort
to put the holes at the same level and why wasn't this checking procedure
addressed in the Shop Manuals for the LM's? Or maybe a tag included like
In a message dated 7/24/2015 9:58:56 P.M. US Mountain Standard Time,
virtualvairs at corvair.org writes:
Smitty is correct as usual.
It says "Trans Fill Only. Check Oil Level at Axle Filler Plug"
I fill the trans till it runs out, put the plug in and then fill the
differential until it runs out since that's what GM says to do.
I usually give it a little time to settle and check again.
From: VirtualVairs [mailto:virtualvairs-bounces at corvair.org] On Behalf Of
Smitty via VirtualVairs
Subject: <VV> Gear lube level problem
Smitty Says This may have already been answered. If so I didn't see
On Early trannys including 65 There is a 2.5 diameter disc (gasket) under
the fill port nut. It says Transmission fill only. Also says check fluid
level at axel servicing plug. Or some words to that effect.
This means to me that to service properly you pull both plugs. Then fill
at the tranny fill hole till it runs out the axle service plug. In other
words the holes are known to be at different levels and you should not fill
at the tranny without pulling the axle plug and not expect to top off at
the tranny with the axel plug installed.
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