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4x4 Truck Axle Tech - Axle 101

Axle COT MOT
(lb-ft)* (lb-ft)**
AAM/GM 7.25 IFS - 2,333
AAM/GM 8.25 IFS - 3,581
AAM/GM 9.25 IFS - 4,643
AAM 9.25 Front - 4,663
AAM/GM 7.63 SF Rear - 3,165
AAM/GM 8.5/8.6 SF Rear - 3,829
AAM/GM 9.5 SF Rear - 4,993
AAM/GM 10.50 FF Rear - 6,242+
AAM/GM 11.50 FF Rear - 8,321+
Dana 28 TTB 575 2,350
Dana 30 Front (all) 640 2,350
Dana 35 TTB & IFS 920 3,700
Dana 44 Beam & TTB 1,100 3,460
Dana 50 Beam & TTB 1,200 5,000
Dana 60 Front 1,500 5,550
Dana 70 Front 2,000 8,000
Dana 35 Rear 870 3,480
Dana 44 Rear 1,100 3,460
Dana 60, 61-SF Rear 1,500 5,500
Dana 60, 61HD-FF Rear 1,500 6,000
Dana 70, 70U Rear 2,000 8,000
Dana 70 HD Rear 2,000 8,800
Dana 80 rear 2,500 10,000
Ford 8.8 IFS/IRS 1,250 4,600
Ford 7.5 Rear 870 3,230
Ford 8.8 (28spline) Rear 1,250 4,600
Ford 8.8 (31spline) Rear 1,360 5,100
Ford 9.75 SF Rear 1,600 6,100
Ford 10.25 FF Rear 2,000 8,300
Ford 10.50 FF Rear 2,900 10,660


Notes
A "+" indicates that the manufacturer offers higher-rated versions.
*Continuous Output Torque
** Maximum Output Torque

Spicer # UTS (lb-ft) Spicer (lb-ft)
or Brand Yield
Strength
260X (D30) 2,950 NA
297X (D44) 4,600 1,600
760X (D44) 5,400 NA
627X (D50) 4,890 2,260
332X (D60) 6,200 3,300


Note
Aftermarket super-strength U-joints like the CTM, the OX or the Yukon are at least two to three times stronger than OEM styles, but no exact test info is available as yet.


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