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RE: Transmission oil - overdrive

To: "'John Slade'" <edalsj@igs.net>,
Subject: RE: Transmission oil - overdrive
From: "Robert J.Jaarsma" <jaars@cyberportal.net>
Date: Thu, 13 Jun 2002 22:18:54 -0400
Is this "OD Spares" of Wolston near Coventry? Tel.0044 24-76543686 Fax
004-24-76544973 or  ODSPARES@aol.com .They specialized in OD conversion
for any type of rear wheel drive car. 
Robert 

-----Original Message-----
From: owner-alpines@autox.team.net [mailto:owner-alpines@autox.team.net]
On Behalf Of John Slade
Sent: Thursday, June 13, 2002 17:22
To: List, Alpine
Subject: Re: Transmission oil - overdrive

I went through this last year, while fitting a Laycock overdrive to my
non-overdrive S IV, and to a Bristol.  It turns out that the gearbox
likes hypoid (gear) oil, while the overdrive likes ATF. If you have a
car in which the oil is separate for the gearbox and the overdrive, then
you use these two lubricants. If, on the other hand, you have a set-up
like that in the Alpine, where a common fluid services both gearbox and
overdrive, then a compromise must be reached. The manufacturers,
certainly in the fifties and the early sixties, decided that
non-detergent single weight engine oil was the best compromise, and made
that recommendation. I have stuck to that recommendation over the years,
and have never had on overdrive problem.

Laycock is no longer in business. Their repair and overhaul business was
taken over by a company called Overdrive Repair Services in Sheffield,
UK, which I think is owned by former employees. They have a web site
(ORS) and an e-mail address, neither of whose URLs I can lay my hands on
right now, but I have found them to be difficult to communicate with.

For what it's worth

John Slade
Manotick, ON

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