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Old 02-13-2019, 10:50 PM
cherokee83 cherokee83 is offline
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Dana 44 Beef-up

Hello, interested in beefing-up 1980 W/T Dana 44 Front/Rear Differential
also interested in J20 1985 front/Rear Differential
any and all information thanks
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  #2  
Old 02-13-2019, 11:54 PM
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rang-a-stang rang-a-stang is offline
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When you say "Beef up" Do you mean make it stronger or are you saying you want to add gears/lockers/rear discs?

Dana 44 is relatively stout. You have MMMMAAAANNNNNY options for gears, lockers, and LSDs because they were put in so many rigs. A J20 Dana 60 is inherently stronger but you have to beat on a D44 to really show it's weakness compared to the J20 D60s.

If you have access to the J20 axles, take them both so you have matching hubs (J20's have the 8 lug wheels so you will have to swap wheels, too). I am fairly certain they are a bolt in swap (someone please correct me if I am wrong). If you don't have access to J20 axles, buy the gearset/locker/LSD that fits your budget and needs for your D44s. Keep in mind almost all FSJ axles were open, so just getting a set of J20 axles under your rig is not going to make it any more off-roadable, it'll just be more reliable with huge tires and lots of torque (huge meaning 36" and bigger). My personal opinion for a rig that is 75% or more street, stick with the D44 (it's lighter) add a LSD to the rear (like a Trutrac) and either a lunchbox locker or a Detroit locker for the front.
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  #3  
Old 02-14-2019, 12:44 AM
cherokee83 cherokee83 is offline
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Quote:
Originally Posted by rang-a-stang
When you say "Beef up" Do you mean make it stronger or are you saying you want to add gears/lockers/rear discs?

Dana 44 is relatively stout. You have MMMMAAAANNNNNY options for gears, lockers, and LSDs because they were put in so many rigs. A J20 Dana 60 is inherently stronger but you have to beat on a D44 to really show it's a weakness compared to the J20 D60s.

If you have access to the J20 axles, take them both so you have matching hubs (J20's have the 8 lug wheels so you will have to swap wheels, too). I am fairly certain they are a bolt in swap (someone please correct me if I am wrong). If you don't have access to J20 axles, buy the gearset/locker/LSD that fits your budget and needs for your D44s. Keep in mind almost all FSJ axles were open, so just getting a set of J20 axles under your rig is not going to make it any more off-roadable, it'll just be more reliable with huge tires and lots of torque (huge meaning 36" and bigger). My personal opinion for a rig that is 75% or more street, stick with the D44 (it's lighter) add a LSD to the rear (like a Trutrac) and either a lunchbox locker or a Detroit locker for the front.
Gears, Lockers, Rear Disc brakes also i was told J20 Diff. has a larger spline 35 front/rear, any information on 35 splines for Dana 44 nevertheless $3,500 in wheels and tires for 6 lugs, is it possible to swap 8 lug J20 to 6 lugs
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Old 02-14-2019, 05:31 AM
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fsj454 fsj454 is offline
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jeep dana 60 rear

I put a jeep dana 60 in there rear of my 1982 Cherokee . Must change spring perches to bolt in and use as is. As for the axle splines mine was 30 spline from factory . I put 35 spline alloy axles in rear jeep dana 60 but you will have to ream out spindles to fit larger axles. 8 on 6.5
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1982 cherokee nt. 454. nv4500 .205. dana 60 f+r. twin stick.hydroboost.hydrolic clutch.rock ram.traction bar.warn 12000 winch.4 wheel disc.flip kit.soa.high steer.cross over steer.4.56 detroit locker.35 spline rear alloy axles. 1990 grand wagoneer aka trusty rusty

Last edited by fsj454 : 02-14-2019 at 05:37 AM.
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Old 02-16-2019, 01:48 PM
rocklaurence rocklaurence is offline
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The J20 front is a D44 with larger hubs--they will switch over to 6 lug hubs with the 6 lug caliper brackets. The J20 has 30 splined shafts but the housing is much heavier and stronger than a D44. Note: you can get a few D44 carriers with 33/35 splines.
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