Douglas, I'm not home so I could not look at the plastic bottle to see.
Copper/bronze, I believe it's the copper in the bronze that it reacts with so I
was sort of correct. I suspect that the specks were the dissolved metal
crystalising out.
Never seen anything on the 5.1. In fact I think it has been mentioned on the
list before, but I never remember if there was an answer.
Alan
Original Message:
-----------------
From: Douglas Frank frank@zk3.dec.com
Date: Wed, 18 Oct 2000 13:19:52 -0400
Subject: Re: diff oil filler
"alemen@pop.ftconnect.com" wrote:
>
> Total capacity I seem to remember was 1 1/4 pints (US). I use EP90
> GL5 or whatever it is but it's not supposed to contain phosphorous
> as that eats the copper seals (or something to that effect).
Half right-- but it's GL5 that destroys the bronze bits, so you
want to use an oil marked GL4 on the bottle.
I accidentally filled my diff with Redline 75w90, which is a GL5
formulation, and let it sit for a week before I realized what I'd
done. Draining it out, there were zillions of tiny golden
specks-- and now my shims are a little bit thinner, I guess.
Use GL4. (There's something informally called GL5.1, which is
supposedly a GL5 that's safe for bronze... can anyone out there
enlighten us??)
--
Douglas Frank Compaq Computer Corp. Lead, n. A metal, useful as
ZKO 110 Spit Brook Rd. counterpoise to an argument
603-884-0501 Nashua, NH USA 03062 otherwise unanswerable.
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