Don't forget that Laycock made several versions of their overdrive to
cover a broad range of vehicles.
The overdrive used in the Alpine was obviously one of the smallest.
Some were fitted to Jaguars with engines putting out 250+ HP.
On Tue, 18 Jun 2002 08:36:37 -0700 Jarrid Gross <JGross@econolite.com>
writes:
> Tom,
>
> The designs are similar. I suspect that Gear Venders didnt buy
> a product license, but rather bought their patents.
>
> The gear vender overdrives have much larger planetaries, which
> in conjunction with the clutch sizes, determine the overall capacity
> of the the overdrive.
>
> From time to time a Laycock turns up on Ebay, with the seller
> reporting that its the same thing that Gear Venders sells, and they
> were going to put it on a small block chevy or something.
>
> Id pay a dollar to have been there when they let the clutch out
> for the first time...
>
>
> Jarrid Gross
>
>
> -----Original Message-----
> From: owner-alpines@autox.team.net
> [mailto:owner-alpines@autox.team.net]On Behalf Of Tom Hill
> Sent: Tuesday, June 18, 2002 6:44 AM
> To: Robert J.Jaarsma; 'John Slade'; 'List, Alpine'
> Subject: RE: Transmission oil - overdrive
>
>
> According to their website, Gear Vendors purchased the Laycock
> design and
> are still selling a version of it. I think it is interesting
> because they
> list applications for all sorts of high torque, heavy-duty
> applications such
> as tow trucks and motorhomes. They claim a 30,000 gross combined
> weigh
> rating for their O/D. Cost is anywhere from $2,400 to $3,500!! I
> wonder if
> any of the parts interchange?
>
> Tom Hill
>
>
>
> -----Original Message-----
> From: owner-alpines@autox.team.net
> [mailto:owner-alpines@autox.team.net]On Behalf Of Robert J.Jaarsma
> Sent: Thursday, June 13, 2002 9:19 PM
> To: 'John Slade'; 'List, Alpine'
> Subject: RE: Transmission oil - overdrive
>
>
> 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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