Relative axle strengths/ Tech Thread

[OWEN]

The weak link. Yes they were locked in all the way.

[OWEN]

plz elaborate....

Going up these rock steps


Turns out I just broke the hub, Milemarker Supreme Stainless Sailor Specials the rep said if I ever have a problem to send them back, hopefully they will warranty them I have only wheeled them about 10 times. I'll put a pic up later.

[Bigbike]

any certain year xj?

84-99 Xjs had HP D30s but your best years to get are 92-99, or 95+ due to bigger ujoints. 84-94 used a smaller ujoint, but you could always put your TJs shafts in to get the bigger ones.

[Even]

"special note for low pinion dana30's. don't put money into them. a high pinion dana30 from an xj is a direct swap and you gain ring and pinion strength as well as a driveshaft that wont spin in the rocks."

any certain year xj?

You will most likely want anything 96+, which was the year they switched to the 297 ujoints (stronger). Also, very early models had vaccum disconnect.

[kev711]

special note for low pinion dana30's. don't put money into them. a high pinion dana30 from an xj is a direct swap and you gain ring and pinion strength as well as a driveshaft that wont spin in the rocks.

any certain year xj?

[justtorchit]

I think I just broke a 30 spline dana 60 outer miller locked axle running beadlocked 39s more to come

plz elaborate....

[Bigbike]

did not know yj 30's went as deep as 5.89 . . . hrmmmmmmm

4.88, YJs are HP

[OWEN]

I think I just broke a 30 spline dana 60 outer miller locked axle running beadlocked 39s more to come

[Arundlemcbrundle]

did not know yj 30's went as deep as 5.89 . . . hrmmmmmmm

[Saharicon]

semi float is where the axleshaft rests on bearings on the end of the axle tube, whereas full float is where the axleshaft is independant of the wheel bearing and is bolted by a flange to the rotating assembly, therefore allowing the removal of the shaft without disassembling the rotating assembly in the event of axleshaft failure

Also, in a full float axle the axleshaft only transmits the rotational torque from the differential out to the wheel. It does not carry the weight of the vehicle like a semi-floater does.

[Saharicon]

Some more D60 infor for you.

These are the non desirable D60s


74-75.5 Ford low pinion drivers side closed knuckle drum brake with 30 spline inners, 19 spline outers, small ujoints and weak knuckles.

75.5-77 Ford low pinion drivers side open knuckle disc brake 30 spline inners, 19 spline outers, outer knuckle spindle pilot hole is smaller than 78+ axle and is therefore notched to allow 1480 series U-joint tp pass through.

94+ Dodge drivers side low pinion CAD unit bearing hub 32 spline 1.31” coil sprung Dana 60s

Any other closed knuckle Dana 60, like those from a Jeep M715 that had coarse spline axles



and another little fun fact for everyone just cuz in my research I have seen this question asked 1 billion times.

ALL GM FRONT D60s ARE PASS. DROP!



***DISCLAIMER*** I am no subject matter expert in any area, I have just been doing tons of research the last two months on axles for my jeep so I thought I would help Samual out and put my 2 cents in.

[ninetysix-ex-jay]

I give you 2 thumbs up on this thread

[Riot]

Great thread, dont know how I missed this.

[Lycaon]

[Lycaon]

semi float is where the axleshaft rests on bearings on the end of the axle tube, whereas full float is where the axleshaft is independant of the wheel bearing and is bolted by a flange to the rotating assembly, therefore allowing the removal of the shaft without disassembling the rotating assembly in the event of axleshaft failure