[Fot] Triumph Ring & Pinion

[rocky spitfire4.com]

Last time I found a 4:55 for my Spitfire (back in the early oughts sometime) it came from Canley Classics in the UK. 

After breaking several earlier 4:55s -- the last one I tore off EVERY tooth! -- I had that one from Canley shotpeened before putting it in the car. It lasted. 

I've heard of 4:88s but never seen a live one in 50 years of racinng a Spitfire. I think it's a mythical animal. 🤣

--Rocky Entriken

-----Original Message-----
From: Fot <fot-bounces at autox.team.net> On Behalf Of Mark Bradakis
Sent: Tuesday, April 21, 2026 9:04 PM
To: fot at autox.team.net
Subject: Re: [Fot] Triumph Ring & Pinion

On 4/21/26 12:27 PM, Brian Dennis wrote:
> Greetings,
> I'm looking for a 4:55 (or maybe 4:88?) ring & Pinion to fit the 
> Spitfire differential case. I believe it is from a delivery van or 
> something but I do not remember. This is the one with the bigger 
> diameter pinion shaft.

I used to have a 4:55 set, but it got sold at auction back in 2005.  I lost my job at the U, got behind on my storage rental, and the contents were sold as a lot for like 300 bucks.  Not only the gearset, but a big TR Detroit locker, a Spitfire/GT6 Quaife unit, all my Weber airhorns, chokes and venturis, ( The box of brass bits with calibrated holes was home in my garage ) a Ford 710? 1600 short block from a Lotus Europa, a couple of big TR overdrive transmissions, a D type Spit overdrive, a Spitfire parts car, and a load of various body panels, electrical parts, and so on.

Sigh.

mjb.

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