Nitro Ring & Pinion AAM 9.25" Reverse High Pinion 5.13 Ratio

Price $381.11
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GM IFS & Dodge (AAM) 9.25" Reverse High Pinion 5.13 Nitro Ring & Pinion

Tech Note:

Direct fit for 2007 & Newer Dodge 2500 & 3500 with OEM carrier ONLY.

2003-2006 Dodge vehicles using this ring & pinion on an OEM carrier require MRG925A ring gear spacer or the 07 & newer type carrier NC-AAM9.25-COM.

2007 & newer Dodge 2500 & 3500 will still require MRG925A ring gear spacer with aftermarket air locker such as ARBRD197.

Nitro gears are manufactured from 8620 steel gear forgings in the same manufacturing facilities as GM, Dodge, Ford & 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.


Differential: AAM 9.25" Reverse High Pinion (IFS or Solid Axle)

Gear Ratio: 5.13

Tooth Count: 41/8

Pinion Splines: 30

Ring Gear Bolts: 12 (not included)

Manufacturer: Nitro Gear & Axle

Warranty: 2 Years


1988-1999 Chevy & GMC K2500 (8 Lug Only)

1992-1999 Chevy & GMC K3500 (8 Lug Only)

1999-2019 Chevy Silverado 2500 2500HD & 3500HD

1999-2019 GMC Sierra 2500 2500HD & 3500HD

2003-2009 Hummer H2

2001- 2004 Chevy 1500HD 1500 HD

1992-2013 Chevy Suburban 3/4 Ton 2500

1992-1999 GMC Suburban 3/4 Ton 2500

2000-2013 GMC Yukon XL 3/4 Ton 2500

2006-2008 Dodge Ram 1500 4x4 Mega Cab

2003-2007 Dodge Ram 2500 & 3500 4x4 (Requires spacer)

2007-2019 Dodge Ram 2500 & 3500 4x4


*All Nitro Gear & Axle brand products are warrantied to be free of manufacturer defects for the specified period. Warranty requests must be made by the original purchaser and submitted by the dealer purchased from. Any parts sent for warranty consideration must be pre-approved and shipped prepaid freight to our facility with copy of RGA for our inspection & determination. We will not pay for labor, shipping cost, loss of revenue or perishable goods, commercial losses, costs of telephone calls, shipping or general inconvenience. This is our only warranty expressed or implied. Unauthorized warranty returns may be refused. Warranty generally covers MFG defects in material or workmanship. Abuse, overloading, improper lubrication, misuse, commercial or competition use voids warranty. Normal characteristics are not warrantable, such as Gear whine. Minor cosmetic flaws, dings, burrs from shipping or manufacturing, are not considered defect, it is installer responsibility to address these at time of install. Customer is responsible for shipping charges if warranty is granted. Warranty is for the original purchaser/user, is not transferable. Warranty covers one replacement or credit solely at our discretion. Warranty determinations are at our sole discretion.

In addition to the above conditions, see special notes for these products:

Ring & Pinion - Warrantied against manufacturing defects. 2 years from date of purchase. Must provide set-up specs.

Chromoly front Axles, Excalibur Joints, 30/30 Birfield kits - Warrantied against manufacturing defects for the life of the vehicle. These products are also covered for Breakage. The Shaft / joint must be BROKEN. Wear, twisting, bending are not warrantable. Damages caused by failure of other parts are not warrantable, for example broken U-joint (other than Nitro Excalibur) causing damage to Axle ears.

Rear Chromoly Axles - Warrantied against manufacturing defects for 5 years. These products are also covered for Breakage. The Shaft must be BROKEN. Worn, twisted, or bent axles are not warrantable.


This product can expose you to chemicals including toluene and benzene, which are known to the State of California to cause cancer and birth defects or other reproductive harm.
For more information go to:


Box Weight: 20.5 lb

Box Dimensions: 1 x 1 x 1 in

Shopper Approved Review

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