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C8.25 Questions

shhuskins

NAXJA Forum User
Location
Western NC
I have a 96 that's going to be a straight trail rig. 96 is when the 8.25 changed from a 27 spline to a 29 spline correct? Was there a certain month this happened? My door sticker says May of 96 I'm hoping it's a 29 but idk I have yet to pull the shafts. How much stronger is the 29 over the 27?? The truck Maxxed out yrs down the road will never exceed 33's I'm only planning 31's. I have dreams of a locker but they will probably stay in my dreams. Will a 27 spline handle this? Also going to regear to 4.56
 
I've never seen a definitive change-over date for the change-- I think your best bet is pull a shaft and count.

If 4.56:1 is the goal, and you find a 27spline carrier, I'd say hit the boneyard and grab a 29spline to build. Swap them once you're geared and avoid down time.
 
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