Here is a series of pages written up by Jerry Slattery from Street Rodder April 1995 which documents the wisdom of Mike Bontoft. It is pretty complete as to the varieties of Jaguar IRS units and how to identify them along with a lot of other relevant details:
I seem to dimly recall what happens when you use one of those newfangled lightweight, modern, high tech all - u - minium rear axles. Something like a fiery explosion on I-95 if memory serves.
Yeah, it was rather spectacular going off like a grenade at 80 mph :-)...picture of the resulting carnage below.
To be fair though, it was the wimpy D36 variant (7.8" ring gear) that came out of a wrecked '87 vette. I believe the diff was damaged from the wreck, it was never right. Pinion seal leaked (even after I replaced it), limited slip made unhappy noises, and I pretty well abused it at every opportunity, so it really was just a matter of time. The D44 in there now is rock solid!
Now let's get back to that porker of a Jag rear...my groin still aches when I think about us hoisting that extra unit of yours into the dumpster...:-)
That wasn't a Jag rear - it was a C6 that was ruined by a local person imitating a mechanic...
c6auto.jpg (153.07 KiB) Viewed 8449 times
The only reference I could find about its weight quoted 173 lbs.
That was either the first or second time you and I changed one of those buggers in/out of the Cobra. The latest one has lasted many, many abusive miles :ymapplause:
