7.5 gear swap to 7.65, can I?

[flatheadfever]

I just finished putting in a 2004r in my 83 wagon. I picked up a drum brake blazer rear with a g80 gt4 rear end. Can I swap the gears if I use the axles as well? Are the housing different because of bearing sizes? Trying to find a g80 rear for a 7.5 around here is impossible.
I'm hoping this might work with out spending big bucks. Do you have to replace the crush ring each time you swap gears.
Thanks

 

[Doug213xrj]

Hey. The 7.5, 7.652 and the 7.5/8 all inner change. The difference is in the axle spline, There is 26 spline and 1988 and up 28 spline. The S-10 axles will not work in in your rear end, Must use your axles.


Doug

 

[flatheadfever]

Is there such thing as a 28 spline gbody axles?

 

[RegalBegal]

Here Ya go!

http://www.moserengineering.com/axl...alon-pontiac-grand-prix-pontiac-grand-lemans-

 

[olds307 and 403]

I plan on using those axles. If you plan on burning the tires, the bigger spider gears are a good idea.

 

[flatheadfever]

Here Ya go!

http://www.moserengineering.com/axl...alon-pontiac-grand-prix-pontiac-grand-lemans-

Why so many different 26 spline axles listed. What where the differences in the years other than spline count?
I'm more confused now.

 

[307 Regal]

Judging by the description pages, the difference seems to be in the lug holes. Early G-Bodies still had American standard lugs and lug nuts. Later models had metric lugs and lug nuts. That might have something to do with it. I bought Moser 28 spline axles for my 7.5" (yet to be installed) but I just bought them through Summit.

 

[flatheadfever]

Judging by the description pages, the difference seems to be in the lug holes. Early G-Bodies still had American standard lugs and lug nuts. Later models had metric lugs and lug nuts. That might have something to do with it. I bought Moser 28 spline axles for my 7.5" (yet to be installed) but I just bought them through Summit.

Okay that makes sense.
Thanks