9in ID
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
9in ID
A friend, and fellow reader today told me about a big bearing 9" rear. This is the first that I have heard of this, and don't wish to offend him, but I would be interested to hear responses to his comments, because this is totally news to me.
This is what he wrote;
Actually, there are two differences among 9" rear ends. First is the bearing ends. The axle bearing (near the wheel) can either be a small tapered bearing (a small bearing end) or a large roller bearing (a big bearing end.) The large roller bearing is used on the 3600 lb and up rated 9" rear axles (at least in 1978 models.)
The other difference is that -78 the third member is held in with 1/2" studs, and 79- uses 3/8" studs. I don't know if a third member with 1/2" holes will line up right with a 3/8" studded axle, and I also don't know if a 3/8" holed third member will fit over the 1/2" studs.
John
jowilker
[link:www.ford-trucks.net/users/jowilker|Club FTE since 01 01] My FTE Page
[link:www.ford-trucks.net/users/jowilker/NCFTE.html|NC Truck Owners] NC Ford Truck owners group
66F100s Rule
In the cool still quite of night you can hear chevies rusting away.
This is what he wrote;
Actually, there are two differences among 9" rear ends. First is the bearing ends. The axle bearing (near the wheel) can either be a small tapered bearing (a small bearing end) or a large roller bearing (a big bearing end.) The large roller bearing is used on the 3600 lb and up rated 9" rear axles (at least in 1978 models.)
The other difference is that -78 the third member is held in with 1/2" studs, and 79- uses 3/8" studs. I don't know if a third member with 1/2" holes will line up right with a 3/8" studded axle, and I also don't know if a 3/8" holed third member will fit over the 1/2" studs.
John
jowilker
[link:www.ford-trucks.net/users/jowilker|Club FTE since 01 01] My FTE Page
[link:www.ford-trucks.net/users/jowilker/NCFTE.html|NC Truck Owners] NC Ford Truck owners group
66F100s Rule
In the cool still quite of night you can hear chevies rusting away.
Moderator
Joined: Jan 2001
Posts: 56,992
Likes: 2,741
From: Virginia
9in ID
This is what I ran into while trying to repair my 1980 4x4 9 in rear. It has 31 spline rear axles with the tapered roller bearing out at the wheel. I found an older bronco with the same 3.50 ratio rear but it had 28 spline axles and a regular type roller bearing out at the wheel. I had to swap the 31 spline carrier onto the 28 spline bronco ring gear so the larger axles would fit. Then it was a bolt in. I would think there are probably many variations of axle housings/bearings depending on the application. The only variation of the center section I've seen is the 28/31 spline count.
Senior User
Joined: Dec 2000
Posts: 435
Likes: 0
From: Nebraska Farm
9in ID
When I replaced the wheel bearings on mine, all I could get was a roller bearing. I was told the tapered bearings had a tendency to push out on the seal when the truck was loaded so all that was offered for replacement was the roller. Take it for what its worth.
Dave,
79 F-150 4x4, 390 w/C6, Edelbrock carb, 33X12.50 never will be finished.
Dave,
79 F-150 4x4, 390 w/C6, Edelbrock carb, 33X12.50 never will be finished.
Thread
Thread Starter
Forum
Replies
Last Post
