Eaton Truetrac Limited Slip Differential (MPN: 912A556)

Advanced helical gear design for superior traction and performance.

The Eaton Truetrac Limited Slip Differential is engineered for high performance in various vehicle applications, including road racing and off-road competition. Utilizing a patented design of parallel axis, planetary helical gears, this differential ensures a smooth and quiet automatic division of torque, enhancing vehicle handling and stability. The Truetrac system responds instantly to torque feedback, allowing for effective power transfer to the wheel with the highest traction, which is crucial in challenging driving conditions such as wet or icy surfaces.

Designed for GM 10 Bolt 8.5 Inch Ring Gear Axles, the Truetrac features a 28 spline count and is compatible with gear ratios of 2.73 and higher. Its robust steel construction ensures durability and reliability, making it suitable for both front and rear axles as well as transfer cases. The differential's ability to limit wheel spin-out while improving overall handling makes it a valuable addition to any vehicle seeking enhanced traction and performance.

Eaton's Truetrac Limited Slip Differential is recognized for its proven design and cost-effectiveness, making it a preferred choice among automotive enthusiasts and professionals alike. With its capability to transfer up to 3.5 times more torque to the wheel with the most grip, this differential is a practical solution for a wide range of driving scenarios, from everyday use to specialized applications.

Features

• Patented Design Of Parallel Axis, Planetary Helical Gears - Provides A Smooth And Quiet Automatic Division Of Torque
• Improved Traction Relative To Other Rear-Wheel And Four-Wheel-Drive Vehicles
• Proven Design, Low Cost And Effective Performance All Make The Truetrac Limited-Slip Differential The Ideal Choice For A Wide Variety Of Vehicle Applications
• Limits Wheel Spin-Out And Improves Handling
• Most Designs Are Engineered To Transfer Up To 3.5 Times More Torque To High Traction Wheel
• Limited-Slip Differential Responds Instantly To Torque Feedback, Providing Needed Traction, Anytime, At Any Speed

Specifications

• Manufacturer: Eaton TCPD
• Manufacturer Part Number: 912A556
• Axle Model: GM 8.5 Inch
• Type: Limited Slip
• Spline Count: 28
• Gear Ratio: 2.73 And Up
• Material: Steel
• Journal Size: 1.20 Inch

Compatibility / Fit

• 1978-1981 Buick Century
• 1978-1989 Buick Electra
• 1978-1983 Buick Estate Wagon
• 1978-1989 Buick LeSabre
• 1978-1987 Buick Regal
• 1978-1978 Buick Riviera
• 1978-1980 Buick Skyhawk
• 1978-1979 Buick Skylark
• 1987-1989 Cadillac Brougham
• 1982-1984 Cadillac DeVille
• 1982-1986 Cadillac Fleetwood
• 1975-1986 Chevrolet C10
• 1972-1974 Chevrolet C10 Pickup
• 1988-1989 Chevrolet C1500
• 1975-1986 Chevrolet C20
• 1972-1974 Chevrolet C20 Pickup
• 1988-1989 Chevrolet C2500
• 1975-1986 Chevrolet C30
• 1973-1974 Chevrolet C30 Pickup
• 1988-1989 Chevrolet C3500
• 1978-1989 Chevrolet Camaro
• 1978-1989 Chevrolet Caprice
• 1978-1987 Chevrolet El Camino
• 1978-1979 Chevrolet G20
• 1978-1985 Chevrolet Impala
• 1975-1986 Chevrolet K10
• 1972-1974 Chevrolet K10 Pickup
• 1988-1989 Chevrolet K1500
• 1975-1986 Chevrolet K20
• 1972-1974 Chevrolet K20 Pickup
• 1988-1989 Chevrolet K2500
• 1977-1986 Chevrolet K30
• 1973-1974 Chevrolet K30 Pickup
• 1988-1989 Chevrolet K3500
• 1978-1983 Chevrolet Malibu
• 1978-1988 Chevrolet Monte Carlo
• 1978-1980 Chevrolet Monza
• 1978-1979 Chevrolet Nova
• 1987-1987 Chevrolet R10
• 1987-1988 Chevrolet R20
• 1989-1989 Chevrolet R2500
• 1987-1988 Chevrolet R30
• 1989-1989 Chevrolet R3500
• 1987-1987 Chevrolet V10
• 1987-1987 Chevrolet V20
• 1987-1988 Chevrolet V30
• 1989-1989 Chevrolet V3500
• 1975-1978 GMC C15
• 1972-1974 GMC C15/C1500 Pickup
• 1979-1986 GMC C1500
• 1988-1989 GMC C1500
• 1975-1978 GMC C25
• 1972-1974 GMC C25/C2500 Pickup
• 1979-1986 GMC C2500
• 1988-1989 GMC C2500
• 1975-1978 GMC C35
• 1973-1974 GMC C35/C3500 Pickup
• 1979-1986 GMC C3500
• 1988-1989 GMC C3500
• 1978-1978 GMC G25
• 1979-1979 GMC G2500
• 1975-1978 GMC K15
• 1972-1974 GMC K15/K1500 Pickup
• 1979-1986 GMC K1500
• 1988-1989 GMC K1500
• 1975-1978 GMC K25
• 1972-1974 GMC K25/K2500 Pickup
• 1979-1986 GMC K2500
• 1988-1989 GMC K2500
• 1977-1978 GMC K35
• 1973-1974 GMC K35/K3500 Pickup
• 1979-1986 GMC K3500
• 1988-1989 GMC K3500
• 1987-1987 GMC R1500
• 1987-1989 GMC R2500
• 1987-1989 GMC R3500
• 1987-1987 GMC V1500
• 1987-1987 GMC V2500
• 1987-1989 GMC V3500
• 1978-1989 Oldsmobile Custom Cruiser
• 1978-1981 Oldsmobile Cutlass
• 1978-1984 Oldsmobile Cutlass Calais
• 1980-1983 Oldsmobile Cutlass Cruiser
• 1978-1980 Oldsmobile Cutlass Salon
• 1985-1987 Oldsmobile Cutlass Salon
• 1978-1987 Oldsmobile Cutlass Supreme
• 1978-1985 Oldsmobile Delta 88
• 1978-1979 Oldsmobile Omega
• 1978-1986 Pontiac Bonneville
• 1978-1981 Pontiac Catalina
• 1978-1989 Pontiac Firebird
• 1978-1980 Pontiac Grand Am
• 1978-1981 Pontiac Grand LeMans
• 1978-1987 Pontiac Grand Prix
• 1978-1978 Pontiac Grand Safari
• 1978-1981 Pontiac LeMans
• 1983-1986 Pontiac Parisienne
• 1978-1979 Pontiac Phoenix

Technical Documents

• eaton-performance-differential-application-guide-en.pdf
• eaton-differential-warranty-en.pdf
• Eaton-Performance-Brochure-Web.pdf
• eaton-truetrac-differential-brochure-en.pdf
• eaton-performance-differential-application-guide-en.pdf