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Old 02-11-2020, 01:02 PM
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Kaiserjeeps Kaiserjeeps is offline
304 AMC
 
Join Date: Oct 02, 2002
Location: Mooseville Northern Idaho
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J20 axle questions

I am considering a front and rear 3:73 J20 axle set for my 71 J4000. A Dana 60 and a Dana 44. 8 lug. The dana 60 would be full float with two wheel bearings per side right? Is the diff centered or offset? 12 inch brakes? Or 11?
While not a big deal, will the spring pads be in the right spot for a 71 spring pack?

The dana 44 front would be disc correct? Or drum? I figure I would need the master cylinder and proportioning valve for good stopping function. Is this axle a passenger side drop?
I don't know the year of the J20.
Any do's or don't's would be appreciated.

My 71 currently has 5 lug Dana 44's. I bought a 5 lug rear Dana 60 that is an IH axle so I was able to buy new drums for it. I would rather have 8 lug axles. Especially from another Jeep.

Am I forgetting anything other than needing 8 lug wheels?
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  #2  
Old 02-11-2020, 01:24 PM
joe joe is offline
 
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D44/D60 combo from a FSJ will have some specific differences depending on the year J-20 they came from. Pre-80 D60's pumpkin will be offset to pass side. 80+ will be centered. Front D44 pumpkin will be on pass side pre-80. Offset on 80+.
Disc front brakes only became std on Wags in 74, but on 74-75 J-trucks/Cheros they were still optional and not std equip till 76.
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Old 02-11-2020, 11:16 PM
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Kaiserjeeps Kaiserjeeps is offline
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Well I called and it is a 1974 and has disc brakes. There is someone ahead of me and if he does not buy them I probably will.
I would assume the suspension or the spring pads are in a different spot on the Dana 60 housing. I will know by Thursday.
Thanks Joe.
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1969 1414X Wag,
1970 and 71 project J trucks
1970 Wagoneer Not Sadie
1983 FJ60 wagon
CJ-5's and a 7
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Old 02-13-2020, 11:09 PM
FleetFox FleetFox is offline
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Join Date: Apr 04, 2018
Location: Blue Ridge Mountains
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I can't speak to the 5 lug d60s but I did swap a 1979 j20 D60 onto my project. It had a D61 from a Dodge on it when I got it . The front was the original d44 j10 axle according to the BOM code with 8 lug disc hubs swapped on. I believe the spring plates in the rear were the same for 1/2 ton and 3/4, but the U bolts were different for the bigger axle tubes. Slight offset to the pass side for the D60 as mentioned.

There are a number of pics in my build thread if you are looking for visuals.

Fleet Fox
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Old 02-13-2020, 11:35 PM
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Kaiserjeeps Kaiserjeeps is offline
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Thanks Fleetfox. I will go see your axle pictures. So I was a day late and the guy ahead of me bought them. So I missed out. The price was sure right at 350 for both. I will keep looking. It's not a super high priority but putting stout axles like that under my 71 J4000 seems like a good thing to do. Never hesitate when something like that comes along.
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Most users ever online was 656, 06-30-2007 at 09:50 PM.
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1969 1414X Wag,
1970 and 71 project J trucks
1970 Wagoneer Not Sadie
1983 FJ60 wagon
CJ-5's and a 7
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  #6  
Old 02-14-2020, 10:37 AM
FleetFox FleetFox is offline
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https://www.fsjnetwork.com/forum/vie...p?f=10&t=16965
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  #7  
Old 02-14-2020, 11:57 AM
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Kaiserjeeps Kaiserjeeps is offline
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That axle is perfect under there. Thanks for the visual! Um are those 2x4's OEM jeep? They just reek ford to me...
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Most users ever online was 656, 06-30-2007 at 09:50 PM.
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1969 1414X Wag,
1970 and 71 project J trucks
1970 Wagoneer Not Sadie
1983 FJ60 wagon
CJ-5's and a 7
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Old Today, 08:41 AM
threepiece threepiece is offline
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There is a significant difference in the front spring spacing between the two trucks. They are not interchangeable without modification. There may also be steering linkage issues with an axle swap like this.
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  #9  
Old Today, 12:23 PM
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Kaiserjeeps Kaiserjeeps is offline
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Join Date: Oct 02, 2002
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I missed out on the axles so the whole deal is kaput. But I am learning about this "new" stuff.
There is a chance I will be parting with my two J trucks. I have a potential lead on another M715. And I will see if it goes anywhere. I miss my old beauty. Now I want a non stock truck. Thanks for replying.
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Am I done yet?

Holy Moly, I am done.....

Most users ever online was 656, 06-30-2007 at 09:50 PM.
I was there! Still waiting for my Tee shirt...

1969 1414X Wag,
1970 and 71 project J trucks
1970 Wagoneer Not Sadie
1983 FJ60 wagon
CJ-5's and a 7
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