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Salisbury Axle Question 109 Rear.


Tony Jones

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I'm trying to find out the variant of Salisbury Axle that is used in two 109" Series 3's and the later coilsprung ex MoD Salisbury axle. Can't find the details in my workshop manuals. What are they, are they known as 4Ha, 7HA's or what are they? Anyone any idea as you guys know all bar the answer to life the universe and what ever it was!! :lol:

Cheers all. ;)

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I'm trying to find out the variant of Salisbury Axle that is used in two 109" Series 3's and the later coilsprung ex MoD Salisbury axle. Can't find the details in my workshop manuals. What are they, are they known as 4Ha, 7HA's or what are they? Anyone any idea as you guys know all bar the answer to life the universe and what ever it was!! :lol:

Cheers all. ;)

8ha for all salisbury landrover diff units front or rear.

Grem

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Thanks mate. ;)

I seem to be collecting them at the moment:

Got a 4HA for my Reliant Scimitar SE6a

Got a 7HA for my Reliant Scimitar SE5

And a couple of 8HA's now.

The other reason I ask is because I recently found out that the Jag XJS Powerlock Diffs are essentially a 4HA cut down and can be converted to fit the live axle of the Scimitars. I was wondering whether the same could be true of the 8HA's too as a good s/h Jag diff can be got for about £60.

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I had read years ago that some old jag diffs may be fitted to the same landy housing, but i never knew which model from which car fit. I also dont know if the power lock would be suited to off road applications. Keep me posted on your findings as i might be interested in doing this conversion to my sals!

Grem

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Your right it is a LSD in the Jags were I believe the same as fitted in the Lister XJS's. Those beast were tuned 6-7 litre V12's, the Le Mans versions were also supercharged so they should be able to take plenty of power on the road at least.

That will suit my Airportable as I have a substitute Salisbury lying here and for the mild tuning of a 4 pot then it'll have no problems at all taking it, let's face it the Boxes would go first. Still, i'll not get my hopes up too much, there's bound to be something that'll trip this one up. :rolleyes::lol:

I will however investigate further and keep you all informed;)

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Well update so far.

Thanks first to Gazzar who found articles in reference to Land Rover fitting the Jag Powr-Lok diff to some of their RWD Land Rovers for fitment into army Land Rovers. So, physically it must be possible.

I have found put that the Diff is a tourque biasing diff. From what I can gather in lay mans terms it essentially acts more in acceleration providing a stronger limited slip than in braking/deceleration as more torque is produced in acceleration than in braking. I would imagine that this would not be ideal in an Offroad application as you would want full operation both ways? Is this accurate?

As to the strength of the units, as said previously the diffs were used in the Lister XJS's some of which had outputs of over 500bhp so the question of whether they would take the power is a big and firm yes. they seem pretty bulletproof.

I have tried to get into contact with Salisbury UK, via e-mail but have had no answer as yet. This doesn't surprise me tbh. However, i am hoping to actually have some time off work so i can phone these guys in office hours to see if they are willing to advise me.

I am hopeful that this is a viable modification to make at least in my application (it being mainly an offroad application) and will keep all you guys up to speed on any developments. I have no doubt that it will all come down to buying the diff and taking my own Salisbury apart, fitting it (after finding out I need various parts + mods to it) and then to see what it is like to actuall use on the road. All I need now is to develop some power to then test it too. remember mine is only a 2 1/4 Petrol 4 pot.

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