Hello folks,

I hope you don't mind me putting this in the general chat, I thought it better than creating two posts, one in each sub-section.

I have a question regarding the available diff ratios and what units they were fitted to. I have been trawling the web and tying myself up in knots!

Which Diff units came with the 2.88CWP set?

I am rebuilding a wreck of an old Reliant Scimitar with a Salisbury 4-HA axle that I want to change from the 3.54 CWP to the 2.88CWP following an engine and transmission swap.

I have recently picked up a good condition Dana unit from an XJS but have since found out that despite being used in the IRS system these are different.

So my questions are:

1. Can the 2.88 CWP from the Dana unit be fitted to a Salisbury unit (if it requires some alteration, what are those alterations)?
2. Did any Salisbury units come with a 2.88 CWP set (if so, are these a direct fit item)?

Any help will be gratefully received.

Here's a photo just for interest:


Jaguar 3.0ltr AJ-V6 and 5-speed manual transmission from a circa 2000 S-Type fitted to a 1971 Reliant Scimitar SE5 chassis.

The gearbox is low geared with a direct drive top. With the current CWP ratio and the Scimitars 14" wheels that mean I'll be pulling almost 4,00 RPM at 70mph and first gear will be unusable.

If anyone gets really bored, I have lots of details of the project on my website: www.Auto-TaT.co.uk

Best regards,

Si.

 

The 2.88 was standard issue for the V12 XJS with the HE engine. Meaning from late-1981 onward until about 1993 when the 6.0 V12 was introduced. The majority of these were Salisbury-manufactured. The Dana-manufactured units are mainly found in 1986-87-ish cars.

The above applies the the V12 Series III sedans although it appears the Dana units never made their way into these cars as far as I can tell.

The Series III XJ6 4.2 use the 2.88 Salisbury from about 1982 until 1987....for the USA market, at least. But probably others as well

The V12 cars of the era always had limited slip, if that matters to you. It was optional (and rare) on 6 cylinder cars

Cheers
DD

 

Thanks Doug,

I wish I had asked this question and received your answer before buying the Dana diff I now have. But at least I now know that there are Salisbury diffs out there with the 2.88CWP ratio.

Are these a direct replacement for similar Salisbury units?

I'd best get back looking and put my Dana unit up for sale.

Thanks,

Si.

 

Complete diff assemblies will interchange. The Dana units used different brake discs. And maybe different calipers? Foggy memory on the calipers.

Cheers
DD

 

It's the internals I need to swap as it's going into a Salisbury 4-HA live axle.

Just spotted in your signature, you also have a TR6! You have two key cars on my bucket list!