changing rear gears

[mc50dad]

I'm replacing the stock, factory installed, 3.08 gears for a set of FRPP 3.73's. What are the chances that I won't need to change the pinion and carrier shims?
Thanks!

 

[88stangmangt]

richmond makes a complete kit with shims and all taht good stuff the pinnion should still be good also i would do a trac-lock freshup while your in there.