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post #1 of 5 (permalink) Old 07-28-2006, 09:07 AM Thread Starter
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posi rear question

want a posi and a taller set of gear for the cat.
looked on e-bay. several listed.
question does the IRS in the 97 Cougar require a different or unique carrier?
will a mustang/bronco/ f150 28 spline differentail work?
Seems to be a conflict on the some of the e-bay adds.
some say works with all 28 spline some adds say all except IRS.

i'd rather go slow than not go at all

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post #2 of 5 (permalink) Old 07-28-2006, 09:41 AM
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I think the only difference is the side gears for the trac loc, they need to be machined for use in our cars if they are not the proper ones. I am sure someone who knows will post.

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post #3 of 5 (permalink) Old 07-28-2006, 06:58 PM
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The side gears have to be machined or replaced.

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post #4 of 5 (permalink) Old 07-28-2006, 08:08 PM
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28 splines

I dont think all broncos (any ?) come with 28 splines----could be wrong, first time this year I have a 93 w/351 think it has 31 spline axles. Considering the 9" style outer bearing retainers. That dosnt apply to our IRS.
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post #5 of 5 (permalink) Old 07-28-2006, 08:28 PM
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rangers and cars had 28 spline stock, all the other fullsized trucks and suv's had 31 spline for the 8.8.

94 lx : sold
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