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Old 05-16-2014, 03:14 AM
puttputt puttputt is offline
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Default Jag IRS diff mod, help needed.

Hi,
I wonder if anyone can advise. I am in Western Australia and building
a G-Force Cobra, with GM LS3 6,2 Litre engine, and Tremec Magnum
6 speed with wide ratio (0.50 6th ratio).

I have an open 3.31 jaguar 19 spline IRS diff.

I want to upgrade to a LSD 3.92 30 spline setup. I have ordered new
3.92 gearing, and Dana 30 spline locker, with overhaul kit from The USA.
But cannot locate a supplier for new 30 spline short shafts(half shafts).
Can anyone suggest where I can buy these ?

I can get a pair of used 30 spline half shafts from a 2.88 diff, will these be
correct for my application as I believe a 2.88 cannot be retrofitted with 3.92 or
any 3.xx ratio as it has a different casing, whereas all 3.xx ratio diffs can be
upgraded as all use the same casing.

Correct me if I am wrong with any of the above.

Thanks.
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