diff swap

[s.hogan3]

im looking for a new diff
on the way home from the bbwf i put my foot down and now its takeing me more time to change gear than to get up to 60 and the car keeps on spinning the wheels in 1st 2rd and 3rd even with 245's on it
in the 400se sales list it lists a higher diff
can anyone tell me which jag and diff im looking for allso did tvr mod these diffs in any way ?
thank you

[l33]

s.hogan3 said:

im looking for a new diff
on the way home from the bbwf i put my foot down and now its takeing me more time to change gear than to get up to 60 and the car keeps on spinning the wheels in 1st 2rd and 3rd even with 245's on it
in the 400se sales list it lists a higher diff
can anyone tell me which jag and diff im looking for allso did tvr mod these diffs in any way ?
thank you

The Diff is a 4HU Salisbury diff, used in both the XJS and XJ6.
The early wedges were the non-limited slip diff and the later ones (After about the time as Aframe suspension arrived) were changed to limited slip "powerlock" units.

I don't know anything about the different differential ratios though...

[s.hogan3]

i been looking into it and the standard final drive ratio is 3.54:1 producing 25.4mph per 1000 rpm
the option was 3.068:1 producing 30.86 mph per 1000rpm
as first gear is a waist of time i think it could be a good upgrade for the car i just nead to no the car it came out of

[wedg1e]

ISTR seeing a diff on Ebay in the States, I think it was from an XJ6 auto and the ratio was something like 2.90:1.

Everyone should have one

[grahamw48]

You're right.
I remember from my XJ6 owning days that the diffs were down in the 2s, ratio wise, except for the 2.8 XJ6s, which were higher to allow for their comparative gutlessness, but higher revving engine.
Wheel/tyres were 205/70 x 15.