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Re: (ET) Well the transmission is happy to see me.



I used Amsoil synthetic gear lube in mine.  Decades ago.  I have not had any problem.
Dave


On 12/14/2019 7:46 PM, Chris Tromley wrote:
If the leak is from the axle seals, it's probably too late and you're looking at replacing all the seals - which would mean you could continue using synthetic.  If the leak is at the plug, maybe there's no problem (until there is, in which case it's too late and you're looking at new seals).

So if the seals aren't leaking yet a flush is a good idea.  If it was me I wouldn't assume ATF has no synthetic additives or other odd stuff.  I'd use a light weight non-synthetic motor oil and jack up the rear wheels while you spin it up to splash the oil around.  (Motor oil doesn't have the high pressure additives a loaded transmission needs.)

Motor oil is built from the same stuff as hypoid lube, so you know they'll mix well and give a good flush.  ATF has a lot going on in there, and it's anyone's guess how it'll mix with gear lube.

Chris

On Sat, Dec 14, 2019 at 4:48 PM Chris Zach <cz alembic crystel com> wrote:
That's a problem then. I may just have to order oil from the internet
and do another swap-out. What's good to flush a transmission again, atf?

C

On 12/14/2019 11:14 AM, Chris Tromley wrote:
> As for synthetic oil, my understanding is that seal materials were
> updated around 1980 to be compatible with synthetics.  That means
> original seals in our tractors are probably not.  The failure mode is
> seal swelling, which can deform the seal enough to cause a leak.  Any
> seal replaced in the last couple of decades should be no problem.
>
> Chris
>
> On Fri, Dec 13, 2019 at 5:45 PM Chris Zach <cz alembic crystel com
> <mailto:cz alembic crystel com>> wrote:
>
>     While drilling out the steering cotter pin, I noticed that my E20
>     transmission had leaked all over the driveway. Nice little puddle,
>     turns
>     out the drain plug was not on tightly enough. I cranked it down harder
>     but should I put teflon tape around the threads or something?
>
>     I hate synthetic oil.
>
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