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Salisbury Differential Specifications

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Peter Grant
Posts: 185
Joined: Thu Mar 10, 2016 10:02 pm
Location: Sydney, Australia

Salisbury Differential Specifications

Post by Peter Grant » Wed Mar 13, 2019 4:58 am

I just got a call from a gentleman in Launceston Tasmania Paul Coles.

Paul has a 1956 Armstrong Siddeley Sapphire 236 and is trying to ascertain whether any Daimlers ever used the Salisbury 3HA diffs and if so what ratio.

He wants to increase the ratio in the diff in his car and is trying to get as much information as possible on these diffs.

In a bit of a search I did I found that Jaguar Mk I cars used these diffs as did some Morgans, but I haven’t yet found out if any of our cars did.

Given his car is a 1956 model Paul was wondering if the Conquest or Century diff might be a possible source of spares.

Anyone have any ideas?

Cheers

Peter Grant
Sydney Australia

Stan Thomas
Posts: 509
Joined: Sat Feb 13, 2016 2:14 pm
Location: Penkridge. Staffs.

Re: Salisbury Differential Specifications

Post by Stan Thomas » Wed Mar 13, 2019 9:41 am

G'day Pete,

It might be that just the crown wheel and pinions are interchangable with your friend's Salisbury axle (with just the casings being specific to the make of car), so here are the ratios for the "Conquest/Century" range:

Standard Ratios.
D.J 250/1/1/3/6/7 4.56:1 Drive gear/pinion 41/9
D.J.254/5 3.73:1 Drive gear/pinion 41/11

Alternative Ratios.
D.J. 254/5/6/7 4.10:1 Drive gear/pinion 41/10

D.J.254/5 after chassis number 90500.
4.11:1 (number of teeth not stated in manual)
Last edited by Stan Thomas on Fri Mar 15, 2019 8:11 am, edited 1 time in total.

Peter Grant
Posts: 185
Joined: Thu Mar 10, 2016 10:02 pm
Location: Sydney, Australia

Re: Salisbury Differential Specifications

Post by Peter Grant » Fri Mar 15, 2019 12:52 am

That is brilliant, thank you Stan.
I shall let him know and he can then decide if he wants to source one for his car.
Cheers
Peter Grant

HenryC
Posts: 141
Joined: Mon Feb 15, 2016 8:31 pm
Location: Surrey / East Hampshire

Re: Salisbury Differential Specifications

Post by HenryC » Sat Mar 16, 2019 11:13 pm

You could add the DJ260 Automatic Conquest Century to this list

Rear Axle Ratio 4.09:1
Drive Gear / Pinion 45/11
Cheers, Henry

EL24
Conquest (Drop Head) Coupe DJ252
MGB 8-)

Crossley Stephenson
Posts: 232
Joined: Wed Feb 10, 2016 9:15 pm
Location: Victoria, Australia

Re: Salisbury Differential Specifications

Post by Crossley Stephenson » Fri Mar 22, 2019 6:38 am

I seem to recall the diff in the DJ254 is a 7HA - 4.11 and the diff in the V8250 is a 9HA - 4.11

Michael

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