Drivetrain› Differentials and Rear-End Components
Nitro Gear & Axle
AAM 11.5 Inch 4.88 Ratio Ring And Pinion Nitro Gear and Axle
SKU: N00E AAM11.5-488-NG
Moderate — 2–4 hours
Description
Part #: AAM11.5-488-NG
Nitro gears are manufactured from 8620 steel gear forgings in the same manufacturing facilities as GM, Dodge, Ford and Toyota. They are precision machined using computer controlled processes, heat treated, CNC triple-lapped and Rockwell tested for hardness. These extra steps ensure excellent fitment, ideal contact pattern and smooth, quiet operation.Details:Fits GM and DodgeDifferential: AAM 11.5 Inch, 14 BoltGear Ratio: 4.88 Standard RotationTooth Count: 43/8Pinion Splines: 30Ring Gear Bolts: 12 (not included)Manufacturer: Nitro Gear and AxleWarranty: 2 YearsMade From 8620 SteelCNC Triple LappedRockwell Tested For HardnessSold As A SetVehicle Applications:2003-2009 Dodge Ram 2500 w/Cummins Diesel2003-2009 Dodge Ram 3500 w/Cummins Diesel2001-2009 Chevy Silverado 2500HD w/Duramax2001-2009 Chevy Silverado 3500HD w/Duramax2001-2009 GMC Sierra 2500HD w/Duramax2001-2009 GMC Sierra 3500HD w/Duramax2001-2007 Chevy Silverado 2500HD w/Vortec 8.1L Big Block2001 -2007 Chevy Silverado 3500HD w/Vortec 8.1L Big Block2001-2007 GMC Sierra 2500HD w/Vortec 8.1L Big Block2001-2007 GMC Sierra 3500HD w/Vortec 8.1L Big Block
Fitment
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Specifications
| Brand | Nitro Gear & Axle |
| Part Number | N00E AAM11.5-488-NG |
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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