Plums was looking for some photos, so I figured i'd post them up here for everyone to see.



This is the Gen2 crown wheel out of my XJR, 2.87:1, the ID of the crownwheel is 126.5mm



The largest outside diameter is ~206mm



PCD of the crownwheel bolts, ~152.5mm or 6" on the nose



2.87:1 crown on the left, 3.58:1 crown on the right



2.87:1 crown thickness



3.58:1 crown thickness



Difference between the two



PCD of the 3.58:1 crown, same as the 2.87:1



Marking on the 3.58:1 is 4WBA, compared to the 2.87:1 which is 8WDA



The 3.58:1 has a Ford logo cast into it, the 2.87:1 has no Ford logo that I can see



Height of the 8" carrier. This is the reason why the 8.8" does not fit in the Gen2 housing, the body of the 8" carrier is shorter/narrower to fit the assymetrical housing.



Bolt hole of the 8" carrier, same as the 8.8"



Overall width of the 8" carrier, same as the 8.8"

Interesting that the back side of the 2.87:1 crownwheel has been machined flat, while the 3.58:1 is still raw cast...

 

This would be as expected since it is the equivalent of the Gen1/Gen2 difference in the Lincoln LS world.

 

That's not good. Various install tutorials have warned against even the most minute foreign material on the mating surface.
The runout spec is only 0.001".

Thanks for all the measurements, the one I was missing was the crown wheel diameter.

 

This is an "ahaa" piece of information. It cuts down on the number of differentials that could
be in the same family.

 

Hey guys sorry to break up the threat but can someone tell me if the jaguar s-type and the lincoln ls share the same 3.0 engine?

 

I know this was discussed years ago, but was there ever a definitive answer, I NEED an LSD in my S-Type R and have been asking everywhere. I would love to put a great LSD from ford into there at a very good price.

 

The definitive answer is no, there is no Ford LSD that fits in the 8" housing.

 

If you really want one and won't spend the money for the proper one? I would head over to the Lincoln LS forums because that's where all the knowledge about this came from.

You could do it all with Lincoln LS parts but it will be a big job and there are STILL some unknowns that you might run across.
Read what "Ills" did he was the pioneer on the LS;

https://www.lincolnvscadillac.com/fo...bolt-in.39863/

But there is a LOT of information on that forum beside that thread. So read up!
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A guy from Switzerland who frequented this forum put a Torsen diff in his car, had it converted. He really liked it but that's $4-5K . Search the threads and you'll find it.

 

I gather the Quaife fits but again not cheap.

 

I'm sorry it wasn't a Torsen but a Quaife.

Try these threads:

https://www.jaguarforums.com/forum/j...ntials-134733/

https://www.jaguarforums.com/forum/x...lation-155867/

There's also a thread out there somewhere about the guy in Switzerland.

 

I think I paid $1300 for my Quaife however I did the installation myself on a used differential so I still have my original.

I also wasted a lot of time and some money on trying an alternative that was listed in this forum where someone had claimed to use parts, axles, and diff etc, from another model Jaguar with a Ford LSD. It did not work however I resold the Ford LSD and did not lose out on that.

I also had to pay import duty on it which I forget how much that was.

 

If money is less of a consideration, you can put in the Earlier Ford Mustang Ford Mark 8 IRS differential. These IRS centers can still be purchased at a reasonable price. You can fit any standard Ford 8" LSD in to them.
This swap is documented both here and on the LVC forums. You will need new 1/2 shaft axles and adapt your drive shaft.

You can do the swap for around $3K.

 

https://www.jaguarforums.com/forum/j...-134733/page4/

I hope you are not referring to the above thread. That is where I ran afoul of bad info.

 

A forum member from the UK posted that the diff and driveshafts from a 4.0L S-Type were "bolted in" to his S-Type R after swapping the gears from his original diff, and fitting a Ford 8.8" LSD centre.

He was never heard from again.

In the meantime it's become apparent that this does not work because the hub end of the driveshafts and ABS rings are different.

 

I'll try to summarize putting a LSD in the S-type. 1999 through 2002,Gen 1 housings, the Quaife LSD was the only LSD put in this case. The Lincoln LS guys claim that any 8.8 Ford LSD will fit in the GenI case, but you are limited to the stock ring and pinions.

If you have a GenII S-type (I believe 2003+) There are no LSD's that fits the GenII housing. The Gen II housings eliminated one of the bearing clamps and integrated one of the bearings into the housing. This change drove different length 1/2 shafts.

You can fit a genI housing into the GenII sub frame. Then you have to build up your own set of axles using GenI axle parts. (One or two people claimed success taking this approach.) (I have 4 different variations of S-type axles sitting around, several years ago I mapped out the differences. 1/2 shaft spline counts, CV joint types, relucter rings...)

After all my research, I decided it was better to build up a Mustang/Mark VIII IRS pumpkin with a Torson T2R LSD. (Based on the Image I posed above.) I had to weld new front mounts on the sub frame. The rear GenI cover fits the back of the Mustang housing. I went with the large 31 spline count Torsen LSD, so I ended up making my own 1/2 shaft axes - had custom axle shafts fabricated. If you use the stock ring and pinions, you don't have to modify the drive shaft.

It is a lot of work, but doable. Not a weekend job. If you get serious, I would recommend purchasing a complete STR rear sub frame drop out and gradually build up a complete rebuilt rear end with suspension. This way your car wont be laid up for 5=6 months, Time and money...

 

I had contemplated this at one time but time marches on and things change. I'm still curious though ... so is the 2005 XJR differential and identical match to the one in the 2005 STR?

Thanks Bob S.

 

Physical fit, Yes!

https://www.ebay.com/itm/JAGUAR-XJ8-...4AAOxyF0pTe5q6

Also read Cambo's thread:

https://www.jaguarforums.com/forum/j...ntials-134733/

 

How do I contact DTS. I am in NZ and got sold an Stype supposedly 2006 but the diff makes a lot of noise now after 5 years. I love my car and at 70 years old want it to see me out. It goes really well but the diff? There should be a law against selling shoddy goods.

 

You might be in for a tough time? I started this thread years ago when I had my 2005 STR. As you can see this is post number 400!!
But DTS is still in business and maybe something has changed over the years but I don't think so.
DTS in Michigan

If possible let us know if you come up with anything too!
I think at this late date a stock replacement is the only thing I would do.
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