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The conversion has been done in an S-Type R, the parts are interchangeable (same diff & driveshafts used on both X350 XJR and S-Type R according to the parts catalogue).
Looks like I am out of luck on a Quaife QDF3W. I was hoping I could get one for $1300 delivered including an estimated $120 tariff.
Motorsport UK do not have any they are no longer able to get them.Reason being that Quaife sold all they had to a company called XKR Transmissions in the UK.
No web site and their phone messaging service is full so cannot talk to anybody or leave a message. Does not sound good at all.
The axle shafts as you call them, are not the same between the 4.0L S-Type and the later S-Type & X350.
However the propshaft is compatible.
If you want to make the 4.0L diff conversion, you need the diff and the axle shafts / half shafts.
Then swap the gears out of your diff into the 4.0L one, along with the LSD.
Did some basic research and it looks like this could be a no go for me since the wheel hubs look to be different between the S-type and X350 and I would guess everything that is connected to the wheel hub as well?
It would have been nice to be able to reprogram the appropriate vid block however....
I plan on using parts from a lower mileage, than my car, X350 differential in the 4.0 S-type differential along with the ford LSD. I located one at what I think was a low price after some "negotiation".
All parts except for bearings are on order. The Ford LSD is not expected until January or even February! I did not notice the extended delivery time on it when I ordered it but it was the best price I could find for a new unit.
I am hoping to be able to have the completed rebuild/ replacement diff ready to swap in without having my car out of action for very long.
Have been studying Youtube videos on diff rebuilding.
Having said that I do plan on checking all bushings etc while I am in there and if I need new parts I will replace.
One pic is of a 2005 XJ half shaft and the other a 2001 S-Type 4.0 half shaft.
Quite a difference. It does not look to me that the S-type will simply fit in my XJR?
The project is to make an LSD using the 2001 S-Type 4.0 diff to fit my 2005 XJR.
The S-type has raised timing notches and the XJ has indented slots.
My choices appear to be to see if the XJR hub end will transplant on the S-Type half shaft and failing that
to chop the XJR hub end and have it welded onto the S-Type half shaft.
This is what mine looks like under the car. Not sure when the style was changed, I didn't have a chance to look through JEPC or anything yet, just wanted to get this out to everyone.
It's easy enough to snap a pic with a phone even if the car is on the ground and on its wheels, if anyone is wondering which style ABS ring they have.
Also, I haven't looked into it, but it may be an option to replace the ABS pickups to work with the 'toothed' kind of ring.
Edit: Lovely pic also shows me I need new Anti Roll Bar Links and Stabilizing Links. Crap, more to do 'while I'm in there'