D44's with a diesel

For everything related to converting and up keeping diesel engines in an FSJ
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Grand_Wag_85
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D44's with a diesel

Postby Grand_Wag_85 » Tue Jul 17, 2018 8:25 am

Planning on doing a Duramax swap into a GW to be a DD/tow rig. Will the D44's live behind the diesel? Stock height, stock tires, stockish LB7 or LLY with auto trans.
82 J10
65 J2000

You know it's bad when your car is on the EPA's 10 most wanted list!

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Stuka
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Re: D44's with a diesel

Postby Stuka » Tue Jul 17, 2018 9:45 am

For daily driving the rear D44 would be perfectly fine (towing/hauling is where issues may come up). My concern would be the longevity of the front D44 with the extra weight on it. Ball joints may become a common replacement item.

And one thing to note, I don't think the engine will fit without a lift because of the axle to pan clearance. Stiffer springs would be wanted anyway to deal with the weight. But you can cross that bridge after the engine is in and you can check clearances.
1981 J10 AMC 258 with HEI and Weber 32/36 DGEV Carb, T176, NP208, D44/M23 with 4.56 gears and Detroit Locker, 6" lift, 33x12.50 Cooper STT's, BJ's Offroad Rear Dozer Bumper.
2017 JKU Rubicon Lifted
Pevious Jeeps: 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ

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dodgerammit
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Re: D44's with a diesel

Postby dodgerammit » Sun Jul 22, 2018 2:03 pm

Stuka wrote:For daily driving the rear D44 would be perfectly fine (towing/hauling is where issues may come up). My concern would be the longevity of the front D44 with the extra weight on it. Ball joints may become a common replacement item.



This. Having been on a Dodge truck forum, there have been plenty that have put a Cummins 12 valve (1200#ish) over a 44 with no issues even after a couple years in. However, the weight rating would concern me since a 44 is rated at 3500#. I would also say it depends heavily on the quality of balljoints in the axle.
84 Grand Waggy-Radio Flyer (Garnet Red with Honey interior) AMC 360/727/229 TFI conversion, MSD streetfire ignition, D44/AMC20 Serehill tailgate and headlight harnesses Relays! Relays everywhere! :fsj:

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derf
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Re: D44's with a diesel

Postby derf » Mon Jul 23, 2018 12:50 pm

They might live for a while but if I was going to the trouble of doing a swap with a big heavy diesel I'd be researching heavier duty axles than factory stock.


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