Dave Taylor
02-08-2005, 11:01 AM
Spent some time looking into axle strengths, and options for upgrading...thought I would share some of the data I found.
Axle ratings
January edition of Fourwheeler, page 60.
COT: Continuous output torque rating
MOT: Maximum output torque rating
Dana 35 rear axle COT: 0870 MOT: 3480
Dana 44 rear axle COT: 1100 MOT: 4460
Ford 8.8 31spline COT: 1360 MOT: 5100
Dana 60 semifloat COT: 1500 MOT: 5500
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Warn Axle Test
Axle................Dana 35......Dana 44.......Ford 8.8
Weight............155............167.............1 74
RingGearDia......7.56...........8.5..............8 .8
Pinion Dia.........1.4(26sp)....1.37(30sp)....1.62(30sp)
Axle Dia...........1.16(27sp)..1.30(30sp)....1.32(31sp)
Tube Dia..........2.5"............2.75"...........3.25"
Disks...............no.............Rubicons....... all 95+
Break Strength..4161 ftlb....5982 ftlb.......6200+ ftlb**
**The machine Warn used to test axle breakage maxed out at 6200; at which
the 8.8 had yet to break. Estimates of 8.8 breakage were in the 6400 range.
************************************************** ****
OEM & aftermarket Axle Shaft Ratings
(seems very conservative)
O.E.M Dana 44 30-spline shafts - 2835 lb/ft
O.E.M Ford 88 31-spline shafts - 3725 lb/ft
Super Dana 44 33-spline shafts - 3969 lb/ft
O.E.M Dana 60 35-spline shafts - 4557 lb/ft
Yukon Ford 88 31-spline shafts - 5131 lb/ft
Yukon Dana 60 35-spline shafts - 6380 lb/ft
************************************************** ****
Axle ratings
January edition of Fourwheeler, page 60.
COT: Continuous output torque rating
MOT: Maximum output torque rating
Dana 35 rear axle COT: 0870 MOT: 3480
Dana 44 rear axle COT: 1100 MOT: 4460
Ford 8.8 31spline COT: 1360 MOT: 5100
Dana 60 semifloat COT: 1500 MOT: 5500
************************************************** ****
Warn Axle Test
Axle................Dana 35......Dana 44.......Ford 8.8
Weight............155............167.............1 74
RingGearDia......7.56...........8.5..............8 .8
Pinion Dia.........1.4(26sp)....1.37(30sp)....1.62(30sp)
Axle Dia...........1.16(27sp)..1.30(30sp)....1.32(31sp)
Tube Dia..........2.5"............2.75"...........3.25"
Disks...............no.............Rubicons....... all 95+
Break Strength..4161 ftlb....5982 ftlb.......6200+ ftlb**
**The machine Warn used to test axle breakage maxed out at 6200; at which
the 8.8 had yet to break. Estimates of 8.8 breakage were in the 6400 range.
************************************************** ****
OEM & aftermarket Axle Shaft Ratings
(seems very conservative)
O.E.M Dana 44 30-spline shafts - 2835 lb/ft
O.E.M Ford 88 31-spline shafts - 3725 lb/ft
Super Dana 44 33-spline shafts - 3969 lb/ft
O.E.M Dana 60 35-spline shafts - 4557 lb/ft
Yukon Ford 88 31-spline shafts - 5131 lb/ft
Yukon Dana 60 35-spline shafts - 6380 lb/ft
************************************************** ****