GM 11.5" / AAM 11.5" / Chrysler 11.5" Axle Parts, Gears, and Upgrades
Axle Specifications:
Ring Gear Diameter:
11.500
Diff Cover Bolts:
14
Ring Gear Bolts:
12
Axle Spline Count:
30
Axle Shaft Style:
Full-Floating
C-Clips:
No
Crush Sleeve
Yes
Pinion Diameter:
--
Pinion Splines:
--
Pinion Nut:
36mm
Pinion Support:
No
Carrier Breaks:
No
Dropout Carrier:
No
Max Output Torque:
--
Max Cont. Torque:
--
Torque Specifications:
Pinion Preload New:
20 to 30 in-lbs
Pinion Preload Reused:
8 to 11 in-lbs
Ring Gear Backlash:
.005" to .007"
Ring Gear Bolt Torque:
175 ft-lbs
Carrier Bearing Caps:
200 ft-lbs
Popular Applications:
Chevy Silverado 2500
2001 - 2019
Rear
Chevy Silverado 3500
2001 - 2019
Rear
GMC Sierra 2500
2001 - 2019
Rear
GMC Sierra 3500
2001 - 2019
Rear
Dodge Ram 3500
2003 - 2016
Rear
Axle Images:
Changes By Year:
2001-2010
4.125" Pinion Race OD
2011-2019
4.375" Pinion Race OD
Axle Details
The GM 11.5" axle, also known as the AAM 11.5" axle was introduced as an upgrade to the GM 10.5" 14 Bolt axle in many Chevy, GMC, and Dodge / RAM full size trucks. It features a larger 11.5" ring gear and 30 spline full-floating axle shafts and is only available in standard rotation (rear) solid axle applications.
*Note: While the center section is the same between all GM, AAM, and Chrysler 11.5" axle models, the axle tubes and hubs are different so axle shafts, hub bearings, and brake components are not interchangeable.
*Note: Some components may also fit 2013.5+ Chrysler 11.8" (300mm) axles with 12 bolt ring gears on high output (HO) Ram 3500HD trucks with the 6.7L diesel and Aisin automatic transmission.
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