Something's got to give. Which will it be?

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11-14-2013, 05:44 PM

#11

karls

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Join Date: Jul 2010

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Quote:

Originally Posted by robsjeep9

Ok I'm about to purchase 37" MTR's w Kevlar for my 09 X JKU .... Upfront I have the PR 44 with dynatrac ball joints, Reid knuckles, RCV's and 5.13 gears...... After I add my 37's what's the weak point up front? Or can I wheel it pretty hard? THEN for the rear also 5.13 gears(of course) and I was thinking Yukon chromoly axle shafts in the rear when my ARB air locker goes in. Are you guys saying I shouldn't add the chromoly shafts while the air locker is going in? Are my gears the weak spot if I add the chromoly shafts back there??? What do spare U joints cost? Thanks

I'm no expert in the large axle department, I'm just letting people know that while it's ok to have your shafts be the sacrificial item, it's important to carry a spare part for it. It doesn't seem like your axle shafts will be a problem. Chromo in the rear is fine and I've seen it go both ways- spines shear off (tenfactory axles IIRC with 42's) but also broken gears.

Avoid shock to your axles and you shouldn't run into either problem in the rear.

U-joints vary in price based on what brand you put in there. Brute force joints are $20 if I remember right with the Spicer 5-760x's being closer to $40.

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11-14-2013, 06:01 PM

#12

flomingo

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Join Date: Feb 2013

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Quote:

Originally Posted by robsjeep9

I am curious about this myself. I just read a writeup over at project JK today about the differences between D30/D44/D60 axles. It made me wonder why the D30 was ever produced in the first place! Anyway, when people talk about gears being the "weak link" after beefing up axle shafts, is that referring only to the puny D30 ring & pinion? Or does that also apply to the larger, beefier, and I'm assuming stronger D44 & D60 size ring & pinion as well?

After seeing that writeup I decided 100% not to bother beefing up that puny D30 and to spring for the Dynatrac PR44, Currie Rock Jock 60, or something similar. Does anyone know of any good alternatives that are cheaper?