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GM 8.5" & 8.6" 3.73, Nitro Ring & Pinion
GM 8.5" & 8.6" Ring & Pinion (ABS Ok)

Price: $259.88

Product Code: GM8.5-373-NG

Description Vehicle Applications Warranty Information

GM 8.5" & 8.6" 10 Bolt
3.73 Nitro Ring & Pinion

Differential: GM 8.5" & 8.6" 10 Bolt
Gear Ratio: 3.73
Tooth Count: 41/11
Pinion Splines: 27
Ring Gear Bolts: 10 (not included)
Manufacturer: Nitro Gear & Axle
Warranty: 2 Years

Tech Note:
Nitro 8.5/8.6 gears work on both GM 8.5" and GM 8.6" Differentials.
For 8.5" use MKGM8.5
For 1999-2008 8.6" use MKGM8.6
For 2009-2014 8.6" use MKGM8.6-B

We also offer a custom Nitro ABS Reluctor Ring which eliminates crush sleeve for Caprice & Impala models (includes shims).

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.

Nitro Gear and Axle Premium Differential Ring and Pinion Gears, Axles and parts


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: www.P65Warnings.ca.gov

  • *2 Year Warranty

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