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bobbster
April 11, 2017, 6:12pm Report to Moderator

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Hi just need a bit of information ,
I have a triumph herald 13/60 that i am converting to a Vitesse , i have already changed the chassis to take the rotoflex drive shafts and suspension.
The problem i have now is the out put flanges on the diff are smaller than the vitesse drive shaft couplings.
So can i change the out put shafts on the diff to suit the roto flex shafts?
Also will the diff be ok, it is a 3.89 or will i need to change it and will i have a problem when i get an over drive prop shaft when trying to connect it to the diff.
And advice would be greatly appreciated  
Cheers Nigel
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cliftyhanger
April 11, 2017, 6:25pm Report to Moderator

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Are you sure it is a 3.89? it is possible, but would have been a specially built one. All herald (except the 948's) had a 4.11.

If it is a 3.89, or indeed the late 4.11 yiu can swap the output quarter shafts. Or indeed the flange on the rotpflex shafts.

When you buy a prop you can specify what flanges you want.

But do check the diff carefully. All factory 3.89 had the larger flanges.

This will help

http://www.canleyclassics.com/technical-archive/different-differentials/


Clive Senior

Location-Brighton, East Sussex
Foxy is here, 1500od tax exempt Toledo. Now has the decent engine back in Slant 4 engine bolted in, sprint box and axle.Now has fresh MoT. Needs paint though.
Spitfire Zetec project is started work progressing slooooowly on the road!
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bobbster
April 11, 2017, 6:56pm Report to Moderator

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Hi Cliftyhanger
Thanks for the info, just been and checked the diff and you are right it is a 4.11.
So are you saying that i can leave the out put shaft in the diff and use the flange on the end of the 13/60 drive shafts and they will match with the flange on the rotoflex drive shaft.
Will the 4.11 diff have an affect on the performance.?
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Nick Jones
April 11, 2017, 7:35pm Report to Moderator

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You don't want a 4.11 diff in a Vitesse unless you're going drag racing.  You want at least a 3.89 with a 3.63 being better for a 2L - even if you have overdrive or a 5 speed.

Nick


Nick Jones
Somerset UK

Vitesse Mk 1.5 Convertible EFI, Survivor of RBRR 2008, HCR & 10CR 2009, HCR 2010, 10CR2011, HCR 2012, 10CR2013, 10CR2015, HCR 2016 & HCR 2017.
GT6 Mk3 Roto - project in progress
Spitfire MKIV son's project now on the road as a daily driver
2.5 PI Saloon now EFI (PIe?), Engine rebuilt and running sweet.  Diff howling...... Survivor of HCR 2013 & 2014 Gone to live in Swansea

http://www.tengaston.plus.com
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Dogsbody47uk
April 11, 2017, 7:37pm Report to Moderator
1971 13/60 saloon and 1971 vitesse mk 2 saloon
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All the flanges on a 13/60 take 5/16 inch bolts. All flanges on a Vitesse take 3/8 inch bolts. You will need to change the flanges and or the diff. Propshafts are built to your required spec. Cheers, Dave.


First Triumph: 200cc Tiger Cub. Followed by in no particular order, 350 and 500 Royal Enfield Bullet, Herald 1200, Herald 13/60, Mini 1275 GT, Vitesse 2L convertible, Audi 80, Audi 80 Sport, Fiat 124 Sport Coupe, Triumph 2000, Mk 2 Estate, Fiat Tipo, Fiat Stilo, Fiat Uno, Peugeuot Turbo Diesel(yuk), Lancia HPE 2000ie (wow! a dream!) So far 3 Heralds and My fourth Vitesse in the garage. I may have forgotten some... It's my age.. Oh , Honda 400 four.. Terrifying! And the 2 Renault 5s. Oh, and the Ford Granada 3 litre estate..I think that's the lot.
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bobbster
April 12, 2017, 6:22am Report to Moderator

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It looks like I will have to change the diff.
Thank you all for your advice
Cheers Nigel
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mazfg
April 12, 2017, 7:13am Report to Moderator


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Quoted from Dogsbody47uk
All the flanges on a 13/60 take 5/16 inch bolts. All flanges on a Vitesse take 3/8 inch bolts. You will need to change the flanges and or the diff. Propshafts are built to your required spec. Cheers, Dave.



My output drive flanges take 3/8" bolts, but my propshaft flanges and the diff input flange is 5/16"
My prop is 4.11:1 Vitesse 6 which is the correct one.


Current: Triumph Vitesse 6 convertible with O/D 1964

21 Years ago...and my first car! : Triumph Herald 1200 Saloon/ Tristan conversion 1966
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bobbster
April 12, 2017, 12:15pm Report to Moderator

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Being a Vitesse 6 ,is yours a 1600 as mine will have 2000 engine or does that not make any difrence
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mazfg
April 12, 2017, 12:16pm Report to Moderator


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Quoted from bobbster
Being a Vitesse 6 ,is yours a 1600 as mine will have 2000 engine or does that not make any difrence


I do have the 1600 engine


Current: Triumph Vitesse 6 convertible with O/D 1964

21 Years ago...and my first car! : Triumph Herald 1200 Saloon/ Tristan conversion 1966
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cliftyhanger
April 12, 2017, 3:26pm Report to Moderator

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I would seriously consider a 3.63 diff if you need to source one. It will be a little more relaxed at speed.

Are you fitting overdrive??


Clive Senior

Location-Brighton, East Sussex
Foxy is here, 1500od tax exempt Toledo. Now has the decent engine back in Slant 4 engine bolted in, sprint box and axle.Now has fresh MoT. Needs paint though.
Spitfire Zetec project is started work progressing slooooowly on the road!
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bobbster
April 12, 2017, 4:43pm Report to Moderator

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Yes i have got an over drive gear box. Where would the best place be to get a 3.63 diff from?
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cliftyhanger
April 12, 2017, 4:51pm Report to Moderator

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If you want a rebuilt unit with a guarantee ten Mike Papworth. Otherwise there is the spitfire graveyard and other breakers, or take a risk with a private purchase.


Clive Senior

Location-Brighton, East Sussex
Foxy is here, 1500od tax exempt Toledo. Now has the decent engine back in Slant 4 engine bolted in, sprint box and axle.Now has fresh MoT. Needs paint though.
Spitfire Zetec project is started work progressing slooooowly on the road!
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bobbster
April 12, 2017, 4:57pm Report to Moderator

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Ok i will have to do a bit of searching for a diff and prop shaft, cheers
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glang
April 12, 2017, 5:35pm Report to Moderator

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If your going to be running o/d I would seriously consider the standard 3.89 diff. Unless your going to be doing a lot of motorway miles or tuning the engine this diff is perfect as it allows you to hold speed in 4th while going up long motorway hills (its not nice having to drop down to 3rd). Overtaking of course is also much more fun
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Nick Jones
April 12, 2017, 6:45pm Report to Moderator

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Posts: 9,933
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My 2L Vitesse pulled the 3.63 diff absolutely no problem even when the engine was completely standard.

Nick


Nick Jones
Somerset UK

Vitesse Mk 1.5 Convertible EFI, Survivor of RBRR 2008, HCR & 10CR 2009, HCR 2010, 10CR2011, HCR 2012, 10CR2013, 10CR2015, HCR 2016 & HCR 2017.
GT6 Mk3 Roto - project in progress
Spitfire MKIV son's project now on the road as a daily driver
2.5 PI Saloon now EFI (PIe?), Engine rebuilt and running sweet.  Diff howling...... Survivor of HCR 2013 & 2014 Gone to live in Swansea

http://www.tengaston.plus.com
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