rear axle questions don't know

[old mopar guy]

i have what i think is a 7.25 rear end big bolt pattern but i'm not sure it has a rear cover and i have an 8.75 with small bolt pattern want to use the 7.25 because it is a posi but want keep my small bolt pattern my qusetion is will the axles interchange or are the splines and axle diameter different i'm trying to find out this info before i pull them both apart only to find out that they won't interchange can one of you guys out there give the scoop on it and thanks for any help

 

[1970Duster]

I wouldnt down grade (from a 8.75 to 7.25). Just go buy a suregrip unit or a tru trac and install it into 8.75.

 

[pettybludart]

No the axels won,t interchange.Like was said,get yourself a new or used sure-grip center section to bolt into your 8 3/4.Some guys are looking for the 7 1/4 with suregrip for their period correct cars.Good luck.