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ahebron
January 14, 2017, 8:08am Report to Moderator


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Like most of us I have collection of various Triumph bits cluttering my workshop shelves.
Now I have started to work on my Vitesse I dug out several Dolomite/Toledo 3.89 diff heads and a couple of 4.11 Herald diffs of various description plus a Vitesse/GT6 3.89 diff head with a broken crown wheel.
Obviously the 3.89 Vit/GT6 unit can be rebuilt using the Dol/Tol 3.89 diffs but what is involved in converting the Herald 4.11 to 3.89 using the Dol/Tol units.
I am assuming that I would be best to use a 13/60 4.11 as a start with its bigger half shafts.
Engineers and machinists are not a problem to get work done.

Thanks
Adrian


Eastern shore of Te Whanganui-a-Tara

Vitesse 6 (owned since 1982, driven for 6 months a long time ago)
Vitesse Mk11 Conv (owned since 1992, never driven but the first Vitesse I looked at buying back in early 1982)
2000 BMW R1150 GS
2003 FFRR TD6 HSE
2014 VW Amarok Highline 4Motion
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glang
January 14, 2017, 9:10am Report to Moderator

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ahebron
January 14, 2017, 9:52am Report to Moderator


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Quoted from glang


I certainly hope so.
Thanks

Adrian



Eastern shore of Te Whanganui-a-Tara

Vitesse 6 (owned since 1982, driven for 6 months a long time ago)
Vitesse Mk11 Conv (owned since 1992, never driven but the first Vitesse I looked at buying back in early 1982)
2000 BMW R1150 GS
2003 FFRR TD6 HSE
2014 VW Amarok Highline 4Motion
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Matt306
January 14, 2017, 1:18pm Report to Moderator

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Half shaft flange and prop flanges need to be changed aswell. And the bolts are a size bigger too.


Worcestershire Area Organiser search Facebook for Club Triumph Worcester
Triumph 13/60 1970 Convertible  first car restoration, many botches much learnt... Now back MOTd and Taxed... 2016 RBRR COMPLETE
1974 Spitfire Mk IV in Yellow and Rust... for restoration
Triumph 1000cc 1991 Daytona got to go to pay for Yellow Peril
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herald948
January 14, 2017, 8:31pm Report to Moderator


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Quoted from Matt306
Half shaft flange and prop flanges need to be changed aswell. And the bolts are a size bigger too.
But wouldn't the 13/60 4.11, even with the larger shafts, still have the smaller flanges?



--Andy Mace

*Mrs Irrelevant: Oh, is it a jet?
*Man: Well, no ... It's not so much of a jet, it's more your, er, Triumph Herald engine with wings.
-- Cut-price Airlines Sketch, Monty Python's Flying Circus (22)
http://triumph-herald.us
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Matt306
January 14, 2017, 9:22pm Report to Moderator

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I went from 4.11 to 3.89 on a herald 13/60 and had to change the flanges. Your 4.11 could be different


Worcestershire Area Organiser search Facebook for Club Triumph Worcester
Triumph 13/60 1970 Convertible  first car restoration, many botches much learnt... Now back MOTd and Taxed... 2016 RBRR COMPLETE
1974 Spitfire Mk IV in Yellow and Rust... for restoration
Triumph 1000cc 1991 Daytona got to go to pay for Yellow Peril
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RobPearce
January 14, 2017, 10:21pm Report to Moderator

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The 13/60 diff has the smaller flanges but the larger splines. If you're rebuilding a Dolomite diff into a 13/60 rear casing, you'll re-use the 13/60 output stub shafts, and get the small flanges. If you fit a 3.89 diff from one of the other small chassis cars (Vitesse, GT6, Spitfire MkIV) it will have larger flanges.


Current fleet
1967 Vitesse 2L conv "Tessa"
1970 Spitfire Mk3 (project) "Toby"
1972 GT6 Mk3
Not enough time or space
Recently sold:
1972 2.5 PI estate "Harry" (gone to russell on here)
1973 Toledo 2-door "Spike" (gone to a club official)
Used to have:
1968 Vitesse 2L saloon
1980 Dolomite 1500
1977 Dolomite 1850
1980 Dolomite Sprint
1982 TR7 DHC Sprint
1975 2500S saloon
1971 Herald 13/60 Estate (with 1500 Spit engine)
1975 Stag
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ahebron
May 14, 2017, 3:31am Report to Moderator


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I took my bins of complete Herald diffs and Toledo/Dolomite CWPs to my engineer and he built me up two complete 3.89, one 3.89 CWP nose piece and a  complete 4.11.
My 4.11 diffs needed to be machined to accept the 3.89 parts and we had a pile of parts for the scrap bin left over.
I am happy.

Adrian


Eastern shore of Te Whanganui-a-Tara

Vitesse 6 (owned since 1982, driven for 6 months a long time ago)
Vitesse Mk11 Conv (owned since 1992, never driven but the first Vitesse I looked at buying back in early 1982)
2000 BMW R1150 GS
2003 FFRR TD6 HSE
2014 VW Amarok Highline 4Motion
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Antonnick
May 15, 2017, 6:49am Report to Moderator


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Quoted from Matt306
I went from 4.11 to 3.89 on a herald 13/60 and had to change the flanges. Your 4.11 could be different


When you made this, did you Change the flange(s) on the diff itself or on the propshaft/ half shafts?



Gott hüte mich vorm Sturm und Wind, und Autos ,die aus England sind
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RobPearce
May 15, 2017, 11:23am Report to Moderator

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When I fitted a 3.63 to a 13/60 we swapped the stub axles in the diff itself, thus retaining the small flanges. I believe this is not possible with earlier (1200) diffs. The alternative is to swap the flanges on the half-shafts (with new UJs).


Current fleet
1967 Vitesse 2L conv "Tessa"
1970 Spitfire Mk3 (project) "Toby"
1972 GT6 Mk3
Not enough time or space
Recently sold:
1972 2.5 PI estate "Harry" (gone to russell on here)
1973 Toledo 2-door "Spike" (gone to a club official)
Used to have:
1968 Vitesse 2L saloon
1980 Dolomite 1500
1977 Dolomite 1850
1980 Dolomite Sprint
1982 TR7 DHC Sprint
1975 2500S saloon
1971 Herald 13/60 Estate (with 1500 Spit engine)
1975 Stag
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