Rear Diff Clarification

[Brandon1605]

Ok, Im about to get my hands on a 300ZX NA rear diff, with the option to also purchase a J30 rear diff. Now, the question I have is this; will I have to change the axles or will mine spline up? If I do go with the 300 axles, will they spline to my hubs? Lastly, same questions for the J30 diff. Any help is appreciated.

[koolkillerlook]

j30 rear you can use your axles. but you have to use your current rear cover as far as the 300 diff i dont kno for sure but i believe the axle splins will work with you hubs but u will def have to use the 300 axles. the na 300 rear is a different gear ratio tho so be ready for that. hopefuly i helped