Rear end help needed
Thread Starter
|
Elder User
Joined: Mar 2012
Posts: 787
Likes: 1
From: Prescott AZ.
Rear end help needed
I have two complete 9" rear ends, one a 64 with 3.89 gears and one a 77 with 3.25 gears. Two questions, will the newer pumpkin work in the older housing and will the bigger drum brakes on the 77 work on the older 64 housing? It looks like the 77 drums would work if I use the 77 backing plates. I think that both rear ends have 31 spline axles or at least they are mared the same. Any help would be appreciated.
Hotshot
Joined: Jan 2007
Posts: 11,564
Likes: 4
From: Tucson
This info was posted by Numberdummy a few weeks ago...
(Be aware that 1968/72 F100's were available with 2 different 9" rear axles.
1) 9" with 28 spline axleshafts.
2) 9" w/a 9 3/8" ring gear, 31 spline axleshafts.
9 3/8 vs 9: Only 5 parts are the same: Housing gasket, pinion seal, (1 of 2) pinion bearings, (1 of 2) pinion bearing cups, pilot bearing retainer.
EVERYTHING else is different!)
The 64 rearend will have 28 spline axles, you can swap for the bigger back brakes from a 9 inch up to 1972 if you use the backing plates. the 77 9 inch rear is wider... i think it will work but you will have to move the spring plates.
I think you would be better to swap out the unit as a whole insted of building 1 out of 2
(Be aware that 1968/72 F100's were available with 2 different 9" rear axles.
1) 9" with 28 spline axleshafts.
2) 9" w/a 9 3/8" ring gear, 31 spline axleshafts.
9 3/8 vs 9: Only 5 parts are the same: Housing gasket, pinion seal, (1 of 2) pinion bearings, (1 of 2) pinion bearing cups, pilot bearing retainer.
EVERYTHING else is different!)
The 64 rearend will have 28 spline axles, you can swap for the bigger back brakes from a 9 inch up to 1972 if you use the backing plates. the 77 9 inch rear is wider... i think it will work but you will have to move the spring plates.
I think you would be better to swap out the unit as a whole insted of building 1 out of 2
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 783
From: Simi Valley, CA
All 1957/67 F100 9's have 28 spline axleshafts: B7TZ-4234-A .. Axleshaft / Right/Left is the same.
1953/67 F100's have 11" x 1 3/4" rear brakes / 1968/72 F100's have 11" x 2 1/4" rear brakes.
1953/67 F100's have 11" x 1 3/4" rear brakes / 1968/72 F100's have 11" x 2 1/4" rear brakes.
Thread
Thread Starter
Forum
Replies
Last Post
rustywheel68
1961 - 1966 F-100 & Larger F-Series Trucks
8
Dec 28, 2012 07:20 AM
matt2491
1961 - 1966 F-100 & Larger F-Series Trucks
13
Aug 11, 2008 12:40 AM
TremecGT
1961 - 1966 F-100 & Larger F-Series Trucks
10
Apr 15, 2005 06:23 AM
blatherskite
1961 - 1966 F-100 & Larger F-Series Trucks
12
Mar 23, 2005 05:54 AM
