Vintage Mustang Forums banner

1 - 5 of 5 Posts
G

·
Guest
Joined
·
0 Posts
Discussion Starter #1
Yea, okay, I won't go there on a family forum. I have always heard the Ford 9" rear end is the best ever made. But, how do I tell an 8'' from a 9" rear end, and what's the difference between the two mechanically.
 

·
Registered
Joined
·
1,372 Posts
Look for two dimples on the rear (the side you can see from the back of the car) of the pumpkin. Also, look for lots of reenforcing ribs cast into the front of the pumpkin where the drive shaft attaches. Most of the 8" units (pre-67') only had three puny ribs. The 67' and up 8" units have more ribbing, but less than a 9". Don't forget that while the 9" is the undisputed strength king, it comes at a price. The price is unsprung weight. I have heard others say that the total weight difference is 125 lbs.

Shannon a.k.a. The ShanMan! /forums/images/icons/cool.gif
66' Vintage Burgundy C-code coupe
http://albums.photopoint.com/j/View?u=1571656&a=12306481&p=42935059&Sequence=2.jpg
 

·
Registered
Joined
·
1,260 Posts
You can get a rachet/socket on all the nuts of an 8", but the bottom two of a 9" require a box or open end IIRC.

Rule of thumb I've heard here and from engine builders, an 8" will handle up to about 400H.P. and Ft. Lbs. More than that get a 9".

Doug-"Whether you think you can or think you cannot.....you're right!!" INDY-USA. GT/CS w/289-2v,PDB,A/C,PS,candyapple red,black top and interior,pertronix,chromeSS Wheels w/ GT centers, 215x14 BFG radial T/A's 3.55:1 open and KYB's
 
G

·
Guest
Joined
·
0 Posts
Discussion Starter #4
I have been working on an identification page for the various Ford 9 and 8 inch carriers, take a look Here



1967 S code GT Deluxe Coupe 65B
1966 Convertible 76B 289 4 speed

Descendent of Francois Seguin dit Laderoute,
Soldier Regiment d' Carignan, New France 1665-1668
 

·
Registered
Joined
·
391 Posts
This is what my 9" rear end housing looks like. Most of them are pretty much the same. Look for the dimples.

Russ

http://albums.photopoint.com/j/View?u=1595962&a=12199293&p=44358030&Sequence=0&res=high.JPG
http://albums.photopoint.com/j/View?u=1595962&a=12199293&p=44358027&Sequence=2&res=high.jpg
 
1 - 5 of 5 Posts
Top