09-09-2019, 11:50 PM
Join Date: Jul 2009
Location: Bali, Indonesia
By axle shaft i take it you mean the shaft between the diff and the knuckle? yes, it will last for a while. If you use this only on highway in 2WD, it will last a long time. 35" and D30 off road is not a great combo, and it i more than just upgrading the axle shafts to chromolly, you would also need stronger joints, lockouts and strengthening to the entire case and ends of the axle. If i had to put money on it, the first parts to break will be the joints or the lockouts.
The Dana 30 / AMC20 combo soldiers on in Cjs because they came that way, not because they are the strongest combo. With 35" tyres you should be thinking about single piece axle shafts in the rear AMC20 as one of your first of many expenses. the two part shaft fails even in mild situations as torque reduces on the axle Nut and the parts fret and fail.
Have a look at your rear driveshaft. Is it a simple shaft or a double cardan CV joint? When you lift them you should look at teh angles and if in any doubt change to a double cardan. this will require twisting the pumpkin so it points at the transfer case output, instead of being parallel. Being at angle is either good or bad, depends on the driveshaft. Fortunately they are relatively cheap but you have to get teh alignment right, which is usually a matter of rewelding the spring perches or shimming. the anti wrap bar is to stop the springs from getting all bent up with the extra moment and you bunny hopping down the road, it is not about static alignment. You may or may not need it.
By this time you are probably realisng that going back to stock is cheaper than fixing it up. Big SOA lifts are not for the faint hearted, there is a lot of science and money in it. As soon as you go above about 3" of list, you need to think through every component or you may end up with a wayward slug which drives horribly and is awful slow.
BagusJeep lives in Bali.
1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE