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-   -   Help identifying jaguar IRS (http://www.clubcobra.com/forums/contemporary-classic-forums/148123-help-identifying-jaguar-irs.html)

Pmccooey 04-03-2025 06:11 AM

Help identifying jaguar IRS
 
Id like to know the year/model Jaguar that my rear end came from. I need to know for ordering parts, brakes and possibly changing the rear center section to different gearing. Is there any source or guide for identifying these IRS rears?

Thanks!

ERA174 04-03-2025 07:05 AM

The following link is to a prior post that may be helpful.
http://www.clubcobra.com/forums/aust...ification.html

PDUB 04-04-2025 01:45 AM

This is a link that has some info to help:


https://www.firstcoastcobraclub.com/....php?f=1&t=198


Good luck!

Unique427 04-04-2025 03:41 PM

1 Attachment(s)
Get under the car with a light and mirror.

You need to see the ID tags and casting stamps
found on the differential.

Metal ID tags will be attached to a carrier cover bolt.
The one pictured has the numbers 43 & 13.
43 denotes the ring gear teeth.
13 denotes teeth on pinion.
43/13 = 3.31 differential gear ratio.
46/13 = 3.54 differential gear ratio.

If you have 43/13 tag, a drain AND fill plug, there is a
strong possibility it's from a ('73-79) Series II XJ6

The year will be stamped into the casting such as
shown in the attached picture of a '74 XJ6.

Moss Motors has exploded views of the entire
Jaguar rear suspension. Click the number on the
diagram and it takes you to the corresponding part.

Here's a link to the Moss Motors XJ6 suspension diagrams to get you started.
https://mossmotors.com/jaguar-xj6-xj...48506e2e8e326f


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