Im sorry to ask this, but i just want some input on people with similar set up's and there wisdom concerning my present day set up.

The Jeep ( 1991 MJ, 4.0 (stock), 5 Speed tranny (stock), Crawl Box NP 231 Doubler Transfer case going to an NP 231. Front and Rear Square drive shafts (I know, but its a trail rig only) , Ram assist steering, 1 ton high steer, HP Dana 44 front locked, Dana 60 Rear welded ( 5.38 gears ) and... 37 inch MTR's

My question is, if this set up sounds a little too much for the Dana 44 or Dana 60, please tell me what should be taken care of first.

Again, im sorry to ask this, but i am just checking if the components will hold up in there present day form to rock crawling.


Thanks

The only thing I have that is the same is the D44 with ARB 5.38's and a Rear D60 welded with 5.38's and 37" Krawlers. I did fine all summer but in the last couple of months I have broke 4 axle u-joints in my D44. So I just ordered a set of alloy usa shafts with u-joints. Your D60 will work fine.

Weld some spicer joints into the shafts and you'll be ok.

IMHO, part of the equation is how hard it gets driven as well. I've got a buddy who has broken nearly every part in his front D44 on 33" tires multiple times. I also spoke with a friend of my dad's the other day who is running 40" tires on 10 bolt axles (approx. the same as a 44 anyway) in a full size blazer. I asked him about breakage and he indicated that he has broken stuff, but not frequently.

Take your pick. I personally am building a D44 for my truck and plan to run ~37" tires. I think mine will be fine, but I also feel that I drive pretty conservatively as compared to some other people I know.

Run moly's and you shouldnt have to worry. I'm runnin moly's with 38's, haven't broke in the past year that I've been wheelin this set up.

just as refference - also running a similar set up with detroits d44 front currie 9 in back on 37's no probs in about 3 years of use, recently went to Alloy USA's shafts in front just cause i thought i was pushing my luck - but ive never had a problem before.

I just ordered a set of moly shafts anyways, but I only have the Spicer 760 X joints, is it that common to brake the 760x joints ?? and I plan on welding them in, but not if it would make more since to just buy super joints. My wheeling is moderate to hard wheeling, I choose the line and stick to it unless im bouncing too much, but i never romp on it like many of the hard core guys.

Don't weld the joints to alloy axles, you shouldn't need to. I would run more than jsut the stock 760x with the 4.0 with a doubler.

I have a 4 cylinder, and am putting parts together for my 231/D300 doubler right now, and am upgrading to at least the AlloyUSA X-joints for that until the 60 goes in. This past weekend I finally wallowed out the ears on a 30 outer (only stock one I was running :( ) and broke a cap doing it. Forgot I didn't upgrade one. And I'm not hardcore my any means.

It'll save some time on the trail buying beef parts now.

for crawling it will be fine, you'll be fine with that setup, for awhile, even if you hammer down. definitly bring spares, but you will be alright.

Cromoly front shafts and joints and you should be fine, just gotta be careful when the D44 is bound up and try not to shockload it.

Thank you very much guys, especially for not flaming my redundant question. I will make sure to bring my spare stock shafts in case the moly ones happen to shit out. and for the u-joint, I have four of the 760x joints, until i have enough to buy the yukon - CMT joints, i will use the other two for back ups. I guess the key is to not pound to hard on this axle, but for the most part, im pretty sure that moderate crawling wont be a huge concern.

Thanks again :D