Welcome to Alloy USA - 10 Year Axle Warranty - 5 Year Ring & Pinion Warranty


Ring and Pinion, 3.73 Ratio, 12 Bolt, HD; 63-87 Chevrolet/GMC, 8.875

Price $412.48

Availability: In stock


Quick Overview

SKU: GM12/373+
GM 8 7/8-3.73 Truck Ring/by Alloy USA

Ring and Pinion, 3.73 Ratio, 12 Bolt, HD; 63-87 Chevrolet/GMC, 8.875


Alloy-USA, one of the brands from Omix-ADA, is a manufacturer of performance drive train products, high strength axle shafts and kits, and performance ring and pinion sets. We specialize in Jeeps, Chevy muscle cars, Mustangs, GM, Ford and Dodge trucks. We are everyday enthusiasts just like you. We off-road, drag race, camp, and raise families. We have over 20 years of experience in the performance market, and we know what works and how to make it. We also know how to keep the costs under control, so we can provide you high quality performance products at a fair price.

Additional Information

SKU GM12/373+
UPC 801773002884
Weight 18.5000
Manufacturer Alloy USA
Warranty 5 Year Limited
Item Fits 1973-1983 Oldsmobile 98
1971-1971 Oldsmobile 442
1973-1975 Buick Apollo
1963-1975 Chevrolet Bel Air
1963-1972 Chevrolet Biscayne
1969-1974 Chevrolet Blazer
1979-1981 Chevrolet Blazer K5
1976-1982 Pontiac Bonneville
1964-1981 Chevrolet C10
1969-1981 Chevrolet C10 Pickup
1968-1981 Chevrolet C10 Suburban
1964-1981 Chevrolet C15
1975-1978 GMC C15 Suburban
1968-1974 GMC C15/C1500 Suburban
1969-1981 GMC C1500 Pickup
1979-1981 GMC C1500 Suburban
1973-1981 Chevrolet C20 Pickup
1969-1981 Chevrolet C20 Suburban
1975-1978 GMC C25 Suburban
1970-1978 GMC C25/C2500 Pickup
1973-1974 GMC C25/C2500 Suburban
1979-1981 GMC C2500 Pickup
1979-1981 GMC C2500 Suburban
1967-1972 Chevrolet Camaro
1966-1983 Chevrolet Caprice
1976-1981 Pontiac Catalina
1973-1973 Buick Centurion
1973-1981 Buick Century
1964-1972 Chevrolet Chevelle
1964-1968 Chevrolet Chevy II
1977-1984 Cadillac Commercial Chassis
1966-1970 Chevrolet Corvette
1973-1983 Oldsmobile Custom Cruiser
1971-1981 Oldsmobile Cutlass
1978-1981 Oldsmobile Cutlass Calais
1980-1981 Oldsmobile Cutlass Cruiser
1975-1980 Oldsmobile Cutlass Salon
1971-1981 Oldsmobile Cutlass Supreme
1976-1976 Oldsmobile Cutlass Tiara
Ring Gear Diameter 8 7/8"
Pinion Shaft Diameter 1.625"
Ring Gear Bolts 12
Right Hand Threads 3/8" x 24
Pinion Splines 30
Cover Bolts 12

Where To Buy

Choose from one of our fine retailers below:

Quadratec     4 Wheel Parts     amazon

4 Wheel Drive Hardware     Morris 4x4     Morris 4x4

CSE Offroad     Summit Racing Equipment     CarID

Canadian Retailers:

Just Jeeps

International Dealers:

We proudly export our Omix-ADA Jeep® replacement and restoration parts, Alloy USA Jeep® performance powertrain parts and Rugged Ridge Jeep® accessories and floor liners to over 90 countries around the world. The list of countries and distributors are too many to list here, however, if you email us your city, country, phone number and detail information about your Jeep we will put you in contact with one of our expert distributors in your area to assist you with your Jeep® parts needs: [email protected]