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Club Triumph - Cars - TR2-6 - TR4
TR4

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Club Triumph forum - Cars - TR2-6 - TR4 - diff
< TR5 Ignition diff TR5 Brake Master Cylinder >
"pollystag"
posts: 337
non member
 posted Sun 3rd Apr 2016

Hi all,
im in the process of fitting a second hand diff into my stag, the diff  has got a cd number on it which i think is from a tr6? Does anyone know what the ratio will be and will it be suitable for my manual o/d stag?
cheers steve.

 3 stags,2 tr6's,2 gt6's,3 mk2. and counting.

hockley essex.
Tags - TR2 TR3 TR3A TR3B TR4 TR4A TR5 TR250 TR6
"Richard B"
posts: 11421
Website Moderator
joined on Wed 11th Nov 1992
 posted Sun 3rd Apr 2016 reply 1 of 4

If its a UK TR6 diff then it should be a 3.45, which is taller than a Stag 3.70

This is popular for anyone with an OE auto Stag, as it makes motorway cruising more relaxed.

What backplate is fitted? The Stag has the same body mount points as the MkI Saloon and all Estates. But the Stag backplate will not align with all the bolt holes on the casing and you need a Saloon one.

If you take the backplate off, you can count the teeth. Alternativley there is the "count the number of turns" method.

Triumph Hoover, Location: Billingshurst West Sussex
Spitfire 2.5PI - 1967 having surgery, PI Saloon - 1969 RBRR x 3, PI Estate - 1969 (to restore), Stag - 1971 RBRR x 3, TR250 (going to be a 5 clone)
PI Saloon MkII - 1971(stalled project), Sold some cars!  

Daughters own: Herald 1500 Coupe 1962, Dolomite 1300 1976, Herald 13/60 Estate 1970, MkII 2.5 (Non)-PI
Tags - TR2 TR3 TR3A TR3B TR4 TR4A TR5 TR250 TR6
"pollystag"
posts: 337
non member
 posted Sun 3rd Apr 2016 reply 2 of 4

Ah you have me there.
at the moment i know the stag one is alli and the new one is steel but to the eye they look the same? Will i if needed just be able to change these over? Although saying that the feller i bought it from said it came from a stag.
steve.

 3 stags,2 tr6's,2 gt6's,3 mk2. and counting.

hockley essex.
Tags - TR2 TR3 TR3A TR3B TR4 TR4A TR5 TR250 TR6
"Richard B"
posts: 11421
Website Moderator
joined on Wed 11th Nov 1992
 posted Sun 3rd Apr 2016 reply 3 of 4

I'm suprised that its steel, but that said if it looks the same and is already fitted to the casing, I'd say don't worry.

Triumph Hoover, Location: Billingshurst West Sussex
Spitfire 2.5PI - 1967 having surgery, PI Saloon - 1969 RBRR x 3, PI Estate - 1969 (to restore), Stag - 1971 RBRR x 3, TR250 (going to be a 5 clone)
PI Saloon MkII - 1971(stalled project), Sold some cars!  

Daughters own: Herald 1500 Coupe 1962, Dolomite 1300 1976, Herald 13/60 Estate 1970, MkII 2.5 (Non)-PI
Tags - TR2 TR3 TR3A TR3B TR4 TR4A TR5 TR250 TR6
"pollystag"
posts: 337
non member
 posted Sun 3rd Apr 2016 reply 4 of 4

Ive looked here, and it says cd is from an export tr6 on carbs and gives the ratio as 3.7/1 so this should work ok.
http://club.triumph.org.uk/prefix1.htm#Quick

 3 stags,2 tr6's,2 gt6's,3 mk2. and counting.

hockley essex.
Tags - TR2 TR3 TR3A TR3B TR4 TR4A TR5 TR250 TR6


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