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I just recently completed the rear differential swap from stock to a Ford 8.0 with LSD. The 8.0 was from Lincoln LS and was fitted with a second hand LSD Carrier and 2:88 gears from another X350 diff. The pinion shaft bearings of the 8.0 and the X350 are the same part numbers and the ring gear from the X350 bolted up to the LSD. All was assembled with new bearings, crush sleeve, clutch pack and seals. The gear set out of the Lincoln LS is a 3:58 ratio to it will be saved for the future.
The next step was to acquire a set of 2003 S-Type R axles. The stub axle the fits the 8.0 diff is about an inch longer than the X350 shafts and the right side axle is shorter in overall length. Axles were sourced from a wrecking yard for $60.00 each. So between the used 8.0 diff for $75.00, used LSD for $90.00, new bearings and seals, i was in the project for about $300.00 less labor (Me) and fluids.
My next concern was being able to remove the differential with out dropping down the carriage. The bolts holding the carriage to the body were of concern. I had some difficulties removing the carriage from a 2006 S-Type I scrapped due to a seized bolt and I didn't want to deal with the same issue on my XJR.. So the carriage was left in place.
My XJR
The process starts.
And the Diff is out.
The Ford 8.0 ready to go in.
It is in.
Next big concern was the wheel speed sensor ring.. The S-Type R axle rings are larger in diameter then the X350s so i had to shim out the sensors with some washers for clearance. I hope this doesn't trigger the ABS/ traction control warning light.
In all the job wasn't to bad. Of course i have a lift in a garage with heat, stereo and fridge full of beer, but the job could have be done with some jack stands. Largest issue was a snapped 6MM bolt holding in one of ABS sensors. One trip to Ace hardware for a reverse drill bit and a trip to Home Depot for he tap that #*^@ Ace was out of, $40.00 the busted bolt was out, hole tapped and all back together.
Car drives quiet with no vibrations. I will give it a few miles for the gear oil to soak into the clutches and to break in. Then give a test on some dry pavement with some worn out Pirelli tires to see how it hooks.
Very nice and with a lift - cold beer and fire stove, it looks like a fun weekend job. Congrats...wish i lived close by so you would have a customer!!!
Awesome work brother. And thanks for the detailed write up with pictures.
Had a few questions, from what I understood, the rear gear ratio is the same as stock right? I have read a few times that if that was changed, the car would recognize it and go into limp mode.
Also, I saw you mentioned about the shafts being different lengths. Looks like it evened out, but did it cause any issues with alignment?
Its my understanding that to change the gear ratio requires programming that was expensive.
I only removed the outer spindle and did not get into any of the camber or tow adjustments. it could be a little off but it will require me watching for tire wear to determine that. I will have to replace the lower control arm bushings and upper A-arm and rear toe adjusters in the future, so a rear alignment will be required. at that time.
Are you sure those were 03 STR axles and not from an 00-02 S-Type? The STR should have the same unequal length half shafts and diff as the XJR. The equal length axles from the original stype and LS are available for $50 new and that would make this job super easy.
I searched Car-Part.com to locate these axles and picked them up at a wrecking yard near Cincinnati Oh. I wasn't able to see the exact car they came out of, The wrecking yard tag indicated 03 S-Type Model R. I collected all these parts about 4 years ago and just now got around to completing the project in order to get my garage cleared. If I recall, Early S-Types may have used the Ford 8.0 as apposed to the Jag rear diff. The 2006 S-Type I scrapped has the diff the X350 has, it was a V6 car. The Ford 8.0 is wider. I cannot confirm anything on the S-Type V8 cars. Cambo had a nice write up about the rear differentials a couple years back and that is where i based my information to start the hunt for parts.
I searched Car-Part.com to locate these axles and picked them up at a wrecking yard near Cincinnati Oh. I wasn't able to see the exact car they came out of, The wrecking yard tag indicated 03 S-Type Model R. I collected all these parts about 4 years ago and just now got around to completing the project in order to get my garage cleared. If I recall, Early S-Types may have used the Ford 8.0 as apposed to the Jag rear diff. The 2006 S-Type I scrapped has the diff the X350 has, it was a V6 car. The Ford 8.0 is wider. I cannot confirm anything on the S-Type V8 cars. Cambo had a nice write up about the rear differentials a couple years back and that is where i based my information to start the hunt for parts.
Wooford XJR
The SType and LS both used the same 8.0 when they came out, and in 03 they both changed to a new type with (more) uneven shafts, if the shafts you put in are like the ones on top I think you got your shafts from an early S-Type. If your washer trick got around the ABS ring problem people have been talking about forever then this swap is the way to go.
Yes, The two at the very top look like the ones I used., although i could have sworn the right side axle shaft I used was shorter. I didn't count the teeth on the ABS exciter ring, but could see they were larger in diameter and were going to contact the ABS sensor. three washers per side gave me the clearance needed. So the S-Type they were removed from must have had a Ford 8.0. I did remove the differential from the Lincoln LS but did not pay attention to the axles in it but would have to assume they would work as the Lincoln LS and S-Type share suspension components. Used Lincoln parts should also be cheaper and more common at least here in the US over used Jaguar parts.
You will have to research some of the post from Cambo. There was a dude in Russia who was able to crack the Jaguar ECU via an SSD set up. It was about $1400.00 to tune your car and i think another $700 to change the gear ratio. It was a few years back when I checked into it and more money than I wanted to spend. I have not researched it since, Maybe things have changed.
For some reason I thought this swap didn't work out for a few? On a side note. Couldn't a recalibration box of some sort of the speed output be installed to adjust for different gears? I used one years back as the transmission in my car didnt read off an interal gear. I set it per my GPS and never had any issues. I suppose it would be a matter of where you would tap in on a jag.
I would love a LSD in mine. But that looks like more than I can pull off. Hope it proves to be trouble free.
Used run some in the past. The hot setup was 9” Ford differentials. But solid axles.
Your car looks awesome, paint and wheels are nice.
Nice mod! Have you pushed it since in full throttle and/ or drift it?
I just quickly searched for the same parts on local board and ebay and found some. Could you check wether i found right ones because the diff case looks a liitle different to yours.. will it fly or not?
I must admit the differential you have looks different from the one I used, Mine came from an early model Lincoln LS. Have you been able to source the axles shafts?
When i did this , I also purchased a used X350 rear differential in order to make sure the 2:88 ring and pinion would work in the Lincoln LS differential which they did. This saved me from having my car torn apart while trying t figure all this out.
Thank you for clarification. I was confused by topic name and that OP wrote that installed 8.0" differential with lsd. I searched more and found its because of 8.8" bolt pattern on the ring gear we have from the factory, right? Can you advise helical lsd as well? It seems even helical non-quaife lsd plus case and axles twice cheaper than straight quaife swap..
Thank you for clarification. I was confused by topic name and that OP wrote that installed 8.0" differential with lsd. I searched more and found its because of 8.8" bolt pattern on the ring gear we have from the factory, right? Can you advise helical lsd as well? It seems even helical non-quaife lsd plus case and axles twice cheaper than straight quaife swap..
the detroit is the go to for a helical
you can get a 28 spline torsen for a little more though
I must admit the differential you have looks different from the one I used, Mine came from an early model Lincoln LS. Have you been able to source the axles shafts?
When i did this , I also purchased a used X350 rear differential in order to make sure the 2:88 ring and pinion would work in the Lincoln LS differential which they did. This saved me from having my car torn apart while trying t figure all this out.
The LSDs look reasonably priced.
Wooford XJR
I also found exact case you have. I think i take that one not to risk. I found axles also. Look -
I have two pumpklings sitting in the garage from the times I wanted swap quaife. One of them has 3.07 ratio and I want to try that beacuse xkr guys with 3.31 successfuly swapped 3.58 without falling into limp mode. Maybe there are some tollerance in ECUs allowing that small steps.
What is your driving impressions? Any drawbacks you found in clutch type lsd choice?
you can get a 28 spline torsen for a little more though
Could you show exact torsen model? As i understand there are type1 and type2 torsens(helical). You mean to add more and get type1 instead of detroit (type2)?
Could you show exact torsen model? As i understand there are type1 and type2 torsens(helical). You mean to add more and get type1 instead of detroit (type2)?
as in the Torsen brand Torsen LSD. they make the T2 and the T2R
02-01-2021, 07:49 PM
Ford 8.0 LSD
