Vintage Mustang Forums banner

1 - 7 of 7 Posts
G

·
Guest
Joined
·
0 Posts
Discussion Starter #1
I'm headed to some junk yards and I was wondering the best ways to spot a 9" without pulling them off. And where do you measure??
Is there a number on the data plate that means posi??
Thanks

1970 351 Cleveland Mach I
First car, bought it in 8th grade, I'm now 17 and it's
loads of fun
 

·
Registered
Joined
·
1,135 Posts
From what I have been told you can only get a wrench on the bottom two bolts of a niner, You can get a Socket on an 8. This again is what I have been told..

AKA "Fastbackpimp"
http://hometown.aol.com//dasbus73/Index.html
[color:blue]VMF Member Since Nov. 99</font color=blue>
http://albums.photopoint.com/j/View?u=1590185&a=12106882&p=43855504.jpg
 
G

·
Guest
Joined
·
0 Posts
Discussion Starter #4
Well boys, it's true, the pinion support on a 9" hangs down in front of the lower 3rd member nuts unlike on the 8".

John

[color:blue]'68 Coupe
250/C4, 221 Argentine Head</font color=blue>
 

·
Premium Member
Joined
·
2,678 Posts
for any of the later 9 inches instead of the carrier being smooth like an eight inch it will have a bulge for the ring gear. also if you want to tell a 28 spline from a 31 spline without taking the axles out if you look at the end of the axle it will be smooth for 31 spline and concave for 28 so i have been told.
 
G

·
Guest
Joined
·
0 Posts
Discussion Starter #6
I have smooth ended axles flanges and they are only 28 spline. These from a 1980 Monarch. The axle tubes slope down gently from the center of the housing, then once at half axle, then again at the perches. The rear cover is not smooth but buldges at the ring gear as the previous poster points out.

John

[color:blue]'68 Coupe
250/C4, 221 Argentine Head</font color=blue>
 

·
Registered
Joined
·
10,587 Posts
Take a look at this picture of the differential carrier....the 9" is on the left and 8" is on the right....

Note the differences in shape and particularly the area at the bottom....note how the stud hole is shrouded on the 9" so you must use a wrench to remove the nut...

Pat
http://albums.photopoint.com/j/View?u=1570936&a=11937754&p=42910787.jpg
 
1 - 7 of 7 Posts
Top