Date: Sun, 29 Mar 2009 09:11:22 -0700
Reply-To: aatransaxle <daryl@AATRANSAXLE.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: aatransaxle <daryl@AATRANSAXLE.COM>
Subject: Re: Gear oil in the Automatic fluid
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Typically...I say the seal repl will fix it 90% of the time if fluid
transfers INTO the diff...You can feel any play of the pinion shaft when you
get in there to be sure though..if it wiggles..its bad..
Do the governor and pair of FD to Auto seals at a min. When I install a
pre-rebuilt unit on a final drive, I repl all seals and change oil and tweak
any bearing looseness.
IF however, the gear oil is into the Auto section...Rebuild it or don't
promise it to last...Have seen them be fine for years, but the clutches
don't like any other fluids such as 90 wt or coolant and may disintegrate
quickly..(esp if coolant is involved.)
Daryl of AA Transaxle
(425) 788-4070
aatransaxle.com
86 Syncro Westy
Zetec in the trunk
----- Original Message -----
From: "Michael Tevis" <michaeltevis@HOTMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Saturday, March 28, 2009 10:20 PM
Subject: Gear oil in the Automatic fluid
> Hello group,
>
> I have a customer who has gear oil in their automatic fluid. I did some
> research (both on the archives here and several other sites) and found
> which
> seals are commonly to blame. I called one of the major Vanagon parts
> retailers and told them the problem with the automatic and that I needed
> the
> seals to fix it. I didn't receive the mainshaft seals that go back to back
> and those are the ones that seem to be to blame. So, I called the major
> transmission rebuilder in Oregon who does automatics and a major one here
> in
> california and they both told me that the transmission needs a rebuild
> because the differential bearings wear cause the mainshaft to have some
> play
> and then the seals go bad. They both said that was the only cause of the
> seal failure.
>
> Who am I to argue with people who rebuild them for a living? It's just tha
> in the past on several forums nothing about the bearing was mentioned,
> just
> the seals.
>
> On this trasmission the bearings on the differential on the sides where
> the
> output flanges are seem quite tight. Seemingly not enough to make a shaft
> that doesnt even ride on them wobble enough to make a leak.
>
> Now that the fluids have exchanged a rebuild may be due because the
> clutches
> might be soaked in gear oil and the differential might be damaged if it
> has
> been running in thin automatic fluid. Assuming this problem was caught
> quickly and those parts are ok is a rebuild really necessary or is it
> really
> ALWAYS a sign of worn differential bearings?
>
> thanks!
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