Jim and interested others,
The gearbox casings are the same on all the models however the ratios for
the MK II, IIA, and Alpines MK I and III do vary as follows:
MK II MK IIA Alpines
MK I & III
Top are all 1.00:1
Third 1.49:1 1.49:1 1.33:1
Second (low) 2.47:1 2.47:1 2.19:1
First (emergency low) 3.56:1 3.19:1 2.83:1
Reverse 4.76:1 4.04:1 3.58:1
Overdrive 0.778:1
Also the later MK III gearboxes had needle bearings (vs bronze bushings)
where the input shaft runs in the tailshaft. I rebuilt one this past winter
- lots of fun!
Regards,
Bob
At 09:58 AM 8/27/97 -0400, you wrote:
>In response to Goyden(at)micron.nets request:
>
>I am restoring a 54 Sunbeam Alpine. I purchased a rebuilt overdrive
>transmission from Sunbeam Spares, 214 Wolverton Rd, Blakelands, Milton
>Keynes, Bucks, MK145AB ENGLAND. Phone 011-44-1908 610395 from US. This
>is the spares supplier for STAR--the Sunbeam Talbot Alpine Register.
>Colin Mumbray runs the spares supply and has been an excellent supplier
>of parts for my restoration. To purchase from Colin you need to join
>STAR. Colin knows everything about Sunbeams of this period.
>
>Contact Peter Woodall in the US to join STAR. Peter lives in Washington
>(360 576-4969).
>
>Since I am in the process of upgrading to an overdrive transmission while
>restoring my Alpine, the transmission which was in my car has been
>removed. Since I bought the car non-running, I do not have any
>information about the current condition of my spare transmission--but it
>is available. When I bought the car it came with an extra chassis and
>powertrain--so I have some additional parts available as well. I believe
>the same transmission was used in all Sunbeams of this period--but Colin
>or Peter could answer this question authoritatively. STAR also has
>reproductions of the original parts and service manuals which list the
>parts numbers and could confirm the interchangeability of parts. I would
>check mine, but I am away from home until the weekend.
>
>Hope this helps - Jim
>
>
>
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Robert (Bob) A.C. Hamilton, Waverley, Nova Scotia, Canada
The Man of Many Sunbeams - All "Proper" Talbot Types 1953-1954
Home Page: http://cast.navnet.net/~hamilton/index.html
E-Mail: hamilton(at)cast.navnet.net (preferred)
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