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21 spline is for a 4cyl and a 23 spline is for a v6 or someone who wnats the ultimate in strength.....
Thanks Gentleman........... I know that just from gearing there is alot of stress on the rear 21 spline just because of the gearing............ Really want to know if alot of setups as mine has broken, or just how much stronger the 23 is than the 21 spline.Thanks
if i were you i wouldnt worry about your 21 spline t-cases with your setup. other members on this board on running either more power or lower geared axles/bigger tires than you currently are with 21 spline.
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