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Discussion Starter #1
Read both opinions - anyone KNOW?
Thanks
Jeff
 

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Bringing Yellow Back
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i would not mind IRS on my car if i didnt just spend money on 31 spline upgrade
 

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Token asian guy
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From what I read a long time ago 99's had 28 spline half shafts and 01s had 31 spline. The 03-04 had beffier 31 spline half shafts.
 

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Try to find someone in the SVT section that has rebuilt their rear. They should be able to tell you real quick
 

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Discussion Starter #10
The reason I'm asking is that I'm putting an '03 S/C engine/trans into my '02 car (Australian Delivered) and had heard that the rear wasn't going to be up to the job as it was 28 spline, but had read 31 spline too....
 

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Your stock 2001 halfshafs aren't going to take that kind of power whether they are 31 spline or 28. I'd look in the SVT/4v section and see for sure, then buy some 03/04 halfshafts and a 31 spline diff if you need it
 
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