Quaife diff for 4HA

Discuss and exchange views and technical information about our cars.

Moderators: scimjim, Lukeyboy46, Roger Pennington, philhoward, erikscimitardemon

Post Reply
nickm
Posts: 343
Joined: Tue Jan 08, 2013 9:28 am
Has thanked: 3 times
Been thanked: 7 times

Quaife diff for 4HA

Post by nickm » Thu Nov 12, 2015 3:59 pm

I am considering options regarding LSDs for my SE5.
I have thought about going down the Jag LSD route but
they seem pricey for an old s/h diff.
Can you get a Quaife torque biasing diff fitted to the scimitar 4ha diff?
Nick



User avatar
peter freeman
RSSOC Member
Posts: 9958
Joined: Thu Aug 31, 2006 12:12 pm
Location: Newcastle
Has thanked: 9 times
Been thanked: 357 times
Contact:

Re: Quaife diff for 4HA

Post by peter freeman » Thu Nov 12, 2015 4:15 pm

I have asked Alan Furness to give you a answer as he has a Quaife fitted but I don't know which one.



efi_sprintgte
RSSOC Member
Posts: 1329
Joined: Fri Oct 22, 2010 6:24 pm
Location: Sutton, Surrey
Has thanked: 142 times
Been thanked: 81 times

Re: Quaife diff for 4HA

Post by efi_sprintgte » Thu Nov 12, 2015 4:26 pm

nickm wrote:I am considering options regarding LSDs for my SE5.
I have thought about going down the Jag LSD route but
they seem pricey for an old s/h diff.
Can you get a Quaife torque biasing diff fitted to the scimitar 4ha diff?
Nick
Yes you can, black beastie has one and its noticeably nicer then the plate type fitted to Jekel. They are not a cheap option however.

Cheers JC


JC

piman
Posts: 1051
Joined: Mon Oct 18, 2010 5:42 pm
Location: Oswestry, Shropshire.
Been thanked: 13 times

Re: Quaife diff for 4HA

Post by piman » Thu Nov 12, 2015 5:33 pm

Hello JC,

"Yes you can, black beastie has one and its noticeably nicer then the plate type fitted to Jekel. They are not a cheap option however"

Yes, but when push comes to shove it is not as effective.

Alec


1968 Triumph 2.5 P.I., Jaguar X Type estate 2.5, 1962 Jaguar MK 2, very long term restoration. 1991 Hymer 564 motorhome

nickm
Posts: 343
Joined: Tue Jan 08, 2013 9:28 am
Has thanked: 3 times
Been thanked: 7 times

Re: Quaife diff for 4HA

Post by nickm » Thu Nov 12, 2015 5:51 pm

Would about £1200 as a rough figure sound about right
for the Quaife?
There are people who fit them to Mk2 Jags so am I correct in
thinking the scim will be the same?



efi_sprintgte
RSSOC Member
Posts: 1329
Joined: Fri Oct 22, 2010 6:24 pm
Location: Sutton, Surrey
Has thanked: 142 times
Been thanked: 81 times

Re: Quaife diff for 4HA

Post by efi_sprintgte » Thu Nov 12, 2015 8:36 pm

piman wrote:
Yes, but when push comes to shove it is not as effective.
Apart from not working when a wheel is lifted the ATB is far nicer on the track, even low powered cars become very snatchy and tail happy with the plate type (read slow).

My skyline GTE has the plate type, albeit ramped to the max, which gives great traction but may as well be welded around tight corners! Seem to remember the diff is around £1k so with bearings and fitting £1.5k would probably be the rough costing.

For the record I like a tail happy car but it isn't as fast or predictable.

Cheers JC


JC

User avatar
Old and Slow
RSSOC Member
Posts: 1097
Joined: Tue Jan 20, 2015 5:37 pm
Location: East Berks
Has thanked: 2 times
Been thanked: 53 times

Re: Quaife diff for 4HA

Post by Old and Slow » Thu Nov 12, 2015 8:45 pm

I haven't used them but JB Engineering might have what you want, their website mentions a Quaife for the 7HA:
http://www.jb-engineering.co.uk/
Philip


Philip Needham
Ashley-bodied TR3; '54 Ford Consul; '55 AC 2-Litre Saloon;'65 850 Mini; '70 Ford Zodiac MkIV; XR3i
'81 911SC Targa, '64 Sabre Six

User avatar
peter freeman
RSSOC Member
Posts: 9958
Joined: Thu Aug 31, 2006 12:12 pm
Location: Newcastle
Has thanked: 9 times
Been thanked: 357 times
Contact:

Re: Quaife diff for 4HA

Post by peter freeman » Fri Nov 13, 2015 8:08 pm

Alan is away at the moment but he is his reply.
Peter
Mine is the Jaguar Quaife ATB diff for the 4HA axle. Quaife are familiar with the fitting.
A case hardened spacer needs to be fitted between the halfshafts on assembly with the Reliant set up.
No spacer no correct endfloat in the rear wheelbearings. Again Quaife are aware of this, and can manufacture it.
They supplied my spacer free. I bought and fitted mine ten years ago and it's been trouble free. It is pleasant in use not harsh,
it does "push" you into the corners which you have to make an allowance for on tracks. On the road it behaves very well.
Cost - Ten years ago the diff was £750. Then there is the additional cost of other parts to rebuild the axle I got all the bits
for about £400 not including the cost of a crown wheel and pinion. As you know I did not replace mine it was very very good
after oil changes every 3000 miles. In hindsight for Sprint and Hillclimbs I would have fitted an SE6B CWP which was legal
for my class at the time.
Hope this helps.
Alan



User avatar
1969SE5
Posts: 598
Joined: Tue Nov 06, 2012 11:36 pm
Location: Kidderminster, Worcestershire
Has thanked: 5 times
Been thanked: 6 times

Re: Quaife diff for 4HA

Post by 1969SE5 » Fri Nov 13, 2015 11:36 pm

i am soon to start looking at fiting a jad lsd that i already have bought, i am interested to get the right ratio's what is the se6b ration that you mention ?


“Speed has never killed anyone, suddenly becoming stationary… that’s what gets you.”

nickm
Posts: 343
Joined: Tue Jan 08, 2013 9:28 am
Has thanked: 3 times
Been thanked: 7 times

Re: Quaife diff for 4HA

Post by nickm » Sat Nov 14, 2015 12:01 am

It looks like the Quaife diff is the
way to go,unless powerloks get a
lot cheaper.



User avatar
Roger Pennington
RSSOC Member
Posts: 20106
Joined: Tue Aug 29, 2006 9:43 pm
Has thanked: 155 times
Been thanked: 533 times

Re: Quaife diff for 4HA

Post by Roger Pennington » Sat Nov 14, 2015 12:17 am

1969SE5 wrote:i am soon to start looking at fiting a jad lsd that i already have bought, i am interested to get the right ratio's what is the se6b ration that you mention ?
Se6b had a 3.54:1 ratio, lower than the Se6/6a 3.31:1, or the Se5/5a which were 3.07:1 or 3.31:1 depending on gearbox.
Just a thought, IIRC yours is an early Se5? Is it a 4HA, (some of the early cars had the 7HA)?


....Roger

RSSOC member (since 1982)
- - - - - - - - - - - - - - - - -
Image

"Condition can be bought at any time; Originality, once lost, is gone forever" - Doug Nye

User avatar
Coupe Racing
RSSOC Member
Posts: 7351
Joined: Mon Jul 23, 2007 10:51 pm
Location: Nr Telford - Shropshire
Has thanked: 19 times
Been thanked: 94 times

Re: Quaife diff for 4HA

Post by Coupe Racing » Sat Nov 14, 2015 7:11 am

I have a 3:54 available


Blessed are the Cheese makers

Better to be an hour early than 1 minute late

User avatar
GeeBee R3
Posts: 302
Joined: Tue Jul 15, 2014 9:36 am
Location: Fylde Coast
Has thanked: 20 times
Been thanked: 2 times

Re: Quaife diff for 4HA

Post by GeeBee R3 » Sat Nov 14, 2015 7:39 am

My long term plan is to modify (narrow) a Ford 8.8" axle to fit. 4HA is an 8.5" so very similar in size. Much cheaper and the aftermarket parts situation is superb too. 3.73:1 ratio and plate type LSD as stock (Ford Explorer). Roughly £80 for an axle from the scrappy and £300 for a pair of custom half shafts. You also get a disc rear end thrown in for free!

Take a look at this link as an example of how cheap parts are for them. As an example a genuine Ford Performance LSD rebuilt kit is $80. Complete genuine Ford LSD with carbon fibre upgraded clutch discs? $262! Usually swapping dollars for pounds gets you the price shipped to the UK with all duties paid.

http://www.jegs.com/webapp/wcs/stores/s ... chTerm=8.8

If you can't narrow the axle yourself then there's several companies that will do it for you. John Sleath in the North and Webster Engineering in the South are just two examples. You do not need the C Clip Eliminator kit, which drops the price right down.

EDIT: there's another advantage to an Explorer axle I'd forgotten about. Many of them have an ABS sensor installed that operates from the crown wheel. This could be useful to anyone wishing to fit electric power steering, an electronic speedo (after an engine swap, maybe?) or even ABS! For those who are racing it could even be used to measure wheel slip.


Mark

1972 SE5A

My boundless enthusiasm is unfortunately not matched by either time or budget.

K&Ns at discounted prices.

Alloy radiators coming soon.

User avatar
Nick
Posts: 2979
Joined: Tue May 15, 2007 3:38 pm
Location: Redditch
Been thanked: 61 times

Re: Quaife diff for 4HA

Post by Nick » Sat Nov 14, 2015 8:47 am

I presume this is primarily for the road? My experience is mostly in Competition.

I went from a Quaiffe in my SS1 to a plate type in my Coupe. I love the Quaiffe, smooth, always drove straight, good traction, the car did tend to understeer in slower corners, partly I think the diff.

Coupe slides around quite a lot, fun but not as effective in my view. I would go for the Quaiffe if you can. It is a better engineering solution with no settings or wear.


Nick

MR2 and Beemer 3 series, currently no Scim!
Six times SSSC Class Winner
Not over the hill, just going up it faster !

User avatar
1969SE5
Posts: 598
Joined: Tue Nov 06, 2012 11:36 pm
Location: Kidderminster, Worcestershire
Has thanked: 5 times
Been thanked: 6 times

Re: Quaife diff for 4HA

Post by 1969SE5 » Sat Nov 14, 2015 10:48 am

its a 69 SE5, but has 4HA, was replaced in late 90's


“Speed has never killed anyone, suddenly becoming stationary… that’s what gets you.”

Post Reply

Return to “General Technical Discussion”