Jag IRS - detail

Thanks to John for the following, thought we could build a bit of an archive with stuff like this, just info for all to share, ill sticky it to the top of the tech section.

Heres some specs. Table colums a bit crap as it hasn't copied properly.

Jaguar Rear End (IRS) Specifications

Model Year Gear ratio Width
E Type 61-75 3.07,3.31,3.54 * 52"
Mk 10 61-75 3.54,3.77 * 60.5"
S Type 63-68 3.54,3.77 * 55"
420 66-68 3.54 55"
420G 66-70 3.54,3.77 * 60.5"
XJ6 4.2l 68-85 3.31,3.54,3.77 61"
XJ6 2.8 68-85 4.09,4.55 61"
XJ12 72-85 3.31 * 61"
XJ6/12 S3 79-92 2.88,3.07 61"
XJS 75-96 2.88,3.07,3.54 * 61"

* = Factory Powrloc

XJ6 69-73 (Series I)
Girling Callipers/1/2¡n disc
Ball Bearing Stub Axles
3.54 Gears
61 3/4¡n wide

XJ6 73-79 (Series II)
Girling Callipers and 1/2¡n disc but with Odd dust Cover
Tapered roller bearings on Stub axles standard 3.31 gears
61 3/4¡n wide

XJ6 79-88 (Series III)
Girling Callipers 1/2¡n discs
Tapered roller bearings on stub axles with Drain hole in Stub axle flange
2.88 Gears
61 3/4¡n wide

XJ6/XJ40 88-95
Completely different set up, not recommended for aftermarket applications

XJS 76-87
Girling Callipers 1/2¡n discs
All Powerlock Gears
Tapered Roller Bearings on Stub axles
3.31 Gears
61 3/4¡n wide

XJS 87-89
Girling Callipers 1/2¡n discs
Flat bottom diff with NO drain plug and 3 bolt mounted stub axles
American Dana Unit with weak traction lock (Not recommended)
2.88 Gears
61 3/4¡n wide

XJS 89-95
Girling Callipers 1/2¡n discs
ABS on uprights/speedo pickup in rear aluminum diff cover
2.88 Gears
61 3/4¡n wide



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