Nitro Gear & Axle 8.5" & 8.6" 4.88 Ring & Pinion
GM 8.5" & 8.6" 10 Bolt 4.88 Nitro Ring & Pinion
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
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: GM 8.5" & 8.6" 10 Bolt
Gear Ratio: 4.88
Tooth Count: 39/8
Pinion Splines: 27
Ring Gear Bolts: 10 (not included)
Manufacturer: Nitro Gear & Axle
Warranty: 2 Years
1973-1977 Buick Regal
1973-1977 Buick Apollo
1973-1977 Buick CenturyBuick Roadmaster
1984-1987 Buick Grand National & GNX
1970-1981 Chevy Camaro
1973-1977 Chevy Chevelle
1973-1977 Chevy Malibu
1973-1977 Chevy Monte Carlo
1970-1975 Chevy Nova
1973-1977 Chevy El Camino
1971-1996 Chevy Caprice
1971-1985 Chevy Impala
1994-1996 Chevy Impala SS
1970-1981 Pontiac Firebird & T/A
1971-1977 Pontiac Ventura
1975-1995 Chevy G10 & G20 Van
1996-2010 Chevy Express 1500 Van
1975-1995 GMC Vandura G10 G20 Van
1996-2010 GMC Savana 1500 Van
1980-1987 Chevy & GMC C10 K10 Pickup
1988-1998 Chevy & GMC C1500 (2wd only)
1999-2010 Chevy Silverado 1500 (Not HD or 4x4)
1999-2010 GMC Sierra 1500 (Not HD or 4x4)
1980-1991 Chevy K5 Blazer 2wd or 4wd
1980-1991 GMC K5 Jimmy 2wd or 4wd
1980-1991 Chevy Suburban 1500 2wd or 4wd
*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.
Box Weight: 19 lb
Box Dimensions: 1 x 1 x 1 in