rearend question
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Elder User
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From: Auburn, Il
rearend question
Hey guys, I found me a rear end and finally was able to go pick it up yesturday. My question is, would it be easier to just try to swap out the gears or should I just change out the whole thing. I was thinking the gears because the brakes are great and I didnt want to screw them up but im not sure so im asking. thanks
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Elder User
Joined: Oct 2004
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From: Auburn, Il
opps my bad, its a 9" with 3.50 gears in it. Also I was just going to swap out the whole 3rd member not just the gears themselves and reuse the axles that are already in it unless they are differant.
Last edited by tardster; Jul 12, 2007 at 09:19 AM.
Hotshot
Joined: Jul 2002
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From: Bend,OR
why do you need to swap out the 3rd member? are the gears different to what your currently running?
if you lost the rear end in your current axle there could be debry or other things to cause failure of this 3rd. just replace the fluid,seals and any bearings in the 9" you just picked up and swap the brakes over one side at a time.
if you lost the rear end in your current axle there could be debry or other things to cause failure of this 3rd. just replace the fluid,seals and any bearings in the 9" you just picked up and swap the brakes over one side at a time.
Ford Parts Specialist
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From: Simi Valley, CA
Originally Posted by tardster
opps my bad, its a 9" with 3.50 gears in it. Also I was just going to swap out the whole 3rd member not just the gears themselves and reuse the axles that are already in it unless they are differant.
F100
1957/67 9 inch rear ends came with 28 spline axles.
1968/72 9 inch rear ends came with either 28 or 31 spline axles.
9 inch rear ends from 1968/72 with 31 spline axles used either a 9 inch ring gear or a 9 3/8" ring gear.
Is there a tag on the rear end you bought?
1973 and later F100's with a 9 inch have a wider rear axle housing than the previous years and are too wide to use in pre 1957 trucks. The car rear ends will not swap into a truck.
What did the rear end come out of?
Last edited by NumberDummy; Jul 12, 2007 at 09:49 AM.
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Elder User
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From: Auburn, Il
no they are the same gears, the gears in it are destroyed. When its put in 2H you can hear clanging and stuff, but the rearend I got is from a junkyard so i was thinking of just trying to swapout the 3rd members and maybe the axles if I had to..
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Elder User
Joined: Oct 2004
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From: Auburn, Il
Originally Posted by NumberDummy
9 inch rear ends are NOT all the same.
F100: 1957/67 9 inch rear ends came with 28 spline axles.
1968/72 9 inch rear ends came with either 28 or 31 spline axles.
9 inch rear ends from 1968/72 with 31 spline axles used either a 9 inch ring gear or a 9 3/8" ring gear.
Is there a tag on the rear end you bought?
F100: 1957/67 9 inch rear ends came with 28 spline axles.
1968/72 9 inch rear ends came with either 28 or 31 spline axles.
9 inch rear ends from 1968/72 with 31 spline axles used either a 9 inch ring gear or a 9 3/8" ring gear.
Is there a tag on the rear end you bought?
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Ford Parts Specialist
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From: Simi Valley, CA
FYI: H2K
1978/79 Bronco H2 code is for 3.50 gears WITHOUT Limited Slip.
1973/79 F100/150 H2 code is for 3.50 gears WITH Limited Slip.
K on both Bronco and F100/350 refers to the front axle. It means vehicle has P/S.
Your profile doesn't mention a Bronco, it says 1949 F100...that's why I mentioned the 9 inch comparison.
1978/79 Bronco H2 code is for 3.50 gears WITHOUT Limited Slip.
1973/79 F100/150 H2 code is for 3.50 gears WITH Limited Slip.
K on both Bronco and F100/350 refers to the front axle. It means vehicle has P/S.
Your profile doesn't mention a Bronco, it says 1949 F100...that's why I mentioned the 9 inch comparison.
Last edited by NumberDummy; Jul 12, 2007 at 10:02 AM.
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Elder User
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From: Auburn, Il
Originally Posted by NumberDummy
FYI: H2K
1978/79 Bronco H2 code is for 3.50 gears WITHOUT Limited Slip.
1973/79 F100/150 H2 code is for 3.50 gears WITH Limited Slip.
K on both Bronco and F100/350 refers to the front axle. It means vehicle has P/S.
1978/79 Bronco H2 code is for 3.50 gears WITHOUT Limited Slip.
1973/79 F100/150 H2 code is for 3.50 gears WITH Limited Slip.
K on both Bronco and F100/350 refers to the front axle. It means vehicle has P/S.
Ford Parts Specialist
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From: Simi Valley, CA
Originally Posted by tardster
Then that means I have to switch the whole rearend right?
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Elder User
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From: Auburn, Il
Originally Posted by NumberDummy
Dunno..what yr and model are you working on? Profile says 1949 F100 (F1). If you have more than one Ford, it's best to mention what you're working on.
Ford Parts Specialist
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From: Simi Valley, CA
Originally Posted by tardster
Sorry, I'm working on a 78 Bronco, and it was a 79 ford 4x4 that the rearend came out of.
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Elder User
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From: Auburn, Il
Originally Posted by NumberDummy
According to the H2 axle code, the 79 Ford has limited slip, the 78 Bronco doesn't have limited slip. If you are swapping rear ends, having limited slip is desirable.
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Elder User
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From: Auburn, Il
Ok, so today i was able to do a little work on the rearend. I got the old rearend out and once the new one was bolted up i noticed that the u-joints dont seem to be fitting, the ones from the bronco rearend seem to be smaller than the u-joints from the truck, is there a way i can fix this because the truck had the carrier bearing in it and the bronco doesnt and i'm useing the bronco driveshaft of course so im kinda baffled here now being that im so close to being able to get her out and start driving her.