replacing open rear w/ LS?
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Freshman User
Joined: Jan 2003
Posts: 35
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From: in a house
replacing open rear w/ LS?
1-what is involved in changing out my open rear (code 19) 3.55 on my 2002 Screw KR with a locking type rear.
2-who/where to buy locking rears for the f-150's?
thanks
Rick
2-who/where to buy locking rears for the f-150's?
thanks
Rick
Elder User
Joined: Feb 2004
Posts: 811
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You need the carrier, you may have to buy the clutch pack to install. It does require special tools to get the proper clutch pack clearance. You can switch the ring gear to the new carrier, but you will have to rest backlash clearance. I don't know who makes them for the aftermarket, but I'm shure there is one. Someone here should be able to help with that one.
Senior User
Joined: Jul 2004
Posts: 221
Likes: 1
Alot of companies sell a drop in diff for these trucks. I am going to buy an eaton for my 98 nascar truck, it has a 3.73 open diff.
The eaton is about 400 bucks for the diff, and the install does not require any backlash adjustment or anything like that. It is a bolton. You don't have to touch the ring gear.
JH
The eaton is about 400 bucks for the diff, and the install does not require any backlash adjustment or anything like that. It is a bolton. You don't have to touch the ring gear.
JH
Logistics Pro
Joined: Jul 2002
Posts: 4,821
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From: South Dakota
Ebay is an excellent place to find a used factory LS unit. I paid 40 bucks plus shipping for a complete low milage Track lok LS carrier plus ring gear, shims, etc. Stripped off the ring gear and pinion and resold it on ebay for $30 plus shipping.
You can diy, but if you have never done such a change before, I definately reccomend taking it into a shop and having them install it for you, or finding a buddy that knows what's going on.
I did mine my self, but I have done a few in past years so it really isnt a big deal for me.
You can diy, but if you have never done such a change before, I definately reccomend taking it into a shop and having them install it for you, or finding a buddy that knows what's going on.
I did mine my self, but I have done a few in past years so it really isnt a big deal for me.
Junior User
Joined: Oct 2002
Posts: 61
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From: NY
Originally Posted by JH6
Alot of companies sell a drop in diff for these trucks. I am going to buy an eaton for my 98 nascar truck, it has a 3.73 open diff.
The eaton is about 400 bucks for the diff,{ and the install does not require any backlash adjustment or anything like that.} It is a bolton. You don't have to touch the ring gear.
JH
The eaton is about 400 bucks for the diff,{ and the install does not require any backlash adjustment or anything like that.} It is a bolton. You don't have to touch the ring gear.
JH
You will need to transfer the ring gear over to the new unit, re shim the carrier bearings which sets the back lash to where it was with the original open rear end. If you don't do this you could damage the ring and pinion gears. You will need a dial indicator and mag stand to do this. It is not too hard . You will need to get the bearings pressed on be for you install the posi. If you don't have a press get a repair shop to press them for you .
