Hi all, this is my first post so hello.
I am wondering if it is possible and or has anybody fitted a limited slip diff from a V6 S into a V6.
I am aware that the v8 diff has a wiring loom and controls but a mechanical diff should fit straight in right?

 

I'll be interested to hear what others have to say on this, but here's what my dealer mechanic told me:

Jaguar USA will not allow their dealer mechanics to do it, but it should be doable by a third party mechanic. However, here's the deal breaker. The part is a $6000 (US) part at warrantee replacement cost; retail is likely even higher from Jaguar. If you could get the part number from Jaguar, you might be able to get it cheaper from the OEM, but it still sounds like it's a pretty pricy component.

I was interested, because it's probably the one thing I wanted most from the upgrade to the V6S. I'm more than happy with the power and other driving dynamics of the base car, but that is one item that I thought should be standard in a $70k RWD sports car.

 

From what I can see the complete diff with LSD centre is p/n T2R4000, has a retail price in the UK of £1323 plus tax, plus a £150 exchange surchage so about $2200 plus shipping/taxes/etc.

$6k seems a bit excessive....

 

Cambo, $2200 sounds more like what I was anticipating. As I said I was reporting what I got from my dealer mechanic as my first point of inquiry. Maybe he was confused, and was quoting the cost of the e-diff on the V-8. At any rate, I was not planning to do the swap anytime soon, since I'm fairly certain that JLR would use it as an excuse to void any warranty claim I might make on a power-train issue, so I took it no further.

For future reference, where did you get the part number from?

 

Here SNG Barratt - The Ultimate Jaguar Parts Specialist

 

OK, but how do you know that's the LSD for the F-type V6S? When I search for F-type parts, the site says they do not have them cataloged yet. Can't see any way from that site to be sure that's the correct part. Not doubting you, just curious how you know.

 

Hmm... So the regular differential (T2R4000E) is less than £1k? Or is that for a different car?

 

The E is for an exchange version i.e. rebuilt one.

 

Ah, so you have access to the secret decoder ring... How do us mere mortals get that? I'm fine with posting questions about part numbers on this forum if that's the answer. Anyway, thanks for the info on the LSD. When my warranty is up, I might seriously consider doing this, assuming I don't decide to upgrade to the V6S manual.

 

Sold!

 

Comes with faster acceleration and lower fuel economy. (3.31 vs 3.15 final drive ratio)

 

I wonder if it fits any other Jaguar model?

That would be sweet if it did!
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You will not be able to swap the diff as it will go into the limp mode because of incorrect gear ratio.

 

Quite possibly, and other things like the cruise control might not work either. Since I threw a close ratio locking tranny in my MINI several years back, cruise control only works in 3rd gear (useless).

 

True but you would be able to swap the ring & pinion onto the new LSD center...

 

Curious why you think this is so? Do you think the computer system is that sophisticated to be constantly monitoring the ratio of transmission drive shaft RPM to rear axle RPM and faulting if it does not meet 3.15 within a tight enough tolerance that 3.31 is a fault condition? I'd be surprised if that's the case. Also struggling to understand how a LSD swap would affect cruise control. At the end of the day, they're both purely mechanical devices.

 

I can't explain it either. The issue isn't with the LSD though, it's with the ratios. A number of those folks installing '05-'06 close ratio gear boxes in '02-'04 MINIs lost use of cruise control (except in 3rd gear), and it happened to about half of those who did the swap. That said, none of us had any issues with the car going into limp mode.

 

Have a read here https://www.jaguarforums.com/forum/g...ids-sdd-77299/ it's for the earlier model cars but the same would apply.

Basically changing the diff ratio without adjusting the software throws the car into limp mode.

This would not be the case with the manual transmission though...

 

I have to ask how do we know this to be true?

 

Which bit?