Ford 9" ?
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Fleet Mechanic
Joined: Jun 2011
Posts: 1,804
Likes: 5
From: Southern California
Ford 9" ?
One of my trucks has a 9" rear in it. The gear ratio on the tag says 3.10. I want to swap in lower gears. Something like 3.89. I've read that I only need a ring and pinion cuz there is no carrier or something? Its a one size fits all sorta deal?
Thanks
Thanks
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
Yeah, with the Ford 9" you can swap in a 3.89 ring and pinion in place of the 3.10's.
While you're there, you might as well rebuild it with new bearings and seals.
One note, get more than one crush sleeve. Real easy to go too far when tightening the pinion nut. Once you've gone too far, you can't back up, you've gotta throw away the sleeve and start with a new one. Ask me how I know
.
While you're there, you might as well rebuild it with new bearings and seals.
One note, get more than one crush sleeve. Real easy to go too far when tightening the pinion nut. Once you've gone too far, you can't back up, you've gotta throw away the sleeve and start with a new one. Ask me how I know
.
Thread Starter
|
Fleet Mechanic
Joined: Jun 2011
Posts: 1,804
Likes: 5
From: Southern California
Yeah, with the Ford 9" you can swap in a 3.89 ring and pinion in place of the 3.10's.
While you're there, you might as well rebuild it with new bearings and seals.
One note, get more than one crush sleeve. Real easy to go too far when tightening the pinion nut. Once you've gone too far, you can't back up, you've gotta throw away the sleeve and start with a new one. Ask me how I know.
While you're there, you might as well rebuild it with new bearings and seals.
One note, get more than one crush sleeve. Real easy to go too far when tightening the pinion nut. Once you've gone too far, you can't back up, you've gotta throw away the sleeve and start with a new one. Ask me how I know
.
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
Here's one from Bronco Graveyard. Ford 9" Master Overhaul Kit,TIMKEN BEARINGS!
Before you order, make sure whether you have 28 or 31 spline axles and which type of axle bearing, roller or ball bearing.
If the tag is still on the diff, that can be decoded and give you all the info you need.
Before you order, make sure whether you have 28 or 31 spline axles and which type of axle bearing, roller or ball bearing.
If the tag is still on the diff, that can be decoded and give you all the info you need.
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