Hi Jeff
I have driven both boxes and the main differences are the throw of the stick
the three rail box has a wide neutral line i.e. the cross bar of the H and a
short throw on the legs of the H whereas the single rail is a short throw on
the cross bar of the H and a long throw on the legs of the H. There is also
no adjustment on the single rail box, with the exception that if you have
slack and you can find a better one you can change the nylon bit in the
linkage. The single rail box has been quoted as being the stronger box, and
from experience I would tend to agree as I used to get through boxes on my
herald at a fair rate though each replacement box was probably just a spit
away from failure any how!
Graham.
2500PI MKII
Sprinted Dolomite
2000 MKI
Toledo
1300 Front Wheel Drive
http://members.tripod.co.uk/TriumphIW/index.html
----- Original Message -----
From: Jeff McNeal <jmcneal@ohms.com>
To: <spitfires@autox.team.net>
Sent: Wednesday, May 31, 2000 2:58 PM
Subject: Single rail vs three rail - what's the diff?
>
> Hello all. To those who have driven both, I'm wondering... What are the
> primary differences between three rail and single rail Spitfire
> transmissions? Is one more reliable than the other? Do they *feel*
> different when shifting? Does one type feel tighter or sloppier than the
> other while shifting? Is one type more *adjustable* than the other
> (linkage)? Just curious... TIA
>
> Best wishes,
>
> Jeff in San Diego
>
> '67 RHD Spitfire Mk3 aka "Mrs. Jones"
> Jeff's Classic '67 Spitfire Mk3 site & Vintage Spitfire Webring
> http://www.ohms.com/spitfire/spitfire.shtml
> home of the NEW Totally Triumph Auction
> "By Triumph enthusiasts, for Triumph enthusiasts"
> http://www.ohms.com/cgi-bin/TRauction.cgi
> and... The Triumph Autos/Parts Wanted Listings
> http://www.ohms.com/cgi-bin/TRwanted.cgi
> ...plus a few other surprises!
>
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