Eaton Detroit Truetrac Limited-Slip Differential 30 Spline GM 10.5in 14-Bolt 4.10 and Down Ratio 1972-2007 Chevy Silverado GMC Sierra

Description The Eaton Detroit Truetrac 915A545 brings proven helical gear limited-slip technology to GM 10.5-inch 14-bolt rear axles running 4.10 and numerically lower gear ratios. This patented design utilizes parallel-axis planetary helical gears to provide smooth, quiet, and automatic torque distribution between the drive wheels. The Detroit Truetrac eliminates the clutch packs found in conventional limited-slip differentials, resulting in maintenance-free operation with no components to wear out or adjust. Whether you are hauling heavy loads, driving in adverse weather, or looking for improved everyday traction, the Truetrac delivers consistent performance without the maintenance or noise associated with other differential designs. This carrier fits the legendary GM 14-bolt axle found in 3/4-ton and 1-ton trucks from 1972 through present day. Key Features Patented parallel-axis planetary helical gear design Automatic torque transfer to high-traction wheel Can transfer up to 3.5 times more torque to the wheel with better grip Smooth and quiet operation Maintenance-free design with no clutches to wear Works in forward and reverse ABS compatible No special lubricants or friction modifiers required Fits 4.10 ratio and numerically lower (3.73, 3.42, etc.) Components Detroit Truetrac differential carrier assembly Complete with helical gear set Installation hardware Specs Axle: GM 10.5-inch 14-bolt Spline Count: 30 Spline Diameter: 1.50 inches Ring Gear Size: 10.5 inches Gear Ratios: 4.10 and numerically lower Axle Location: Rear Differential Type: Limited Slip (Helical Gear) Fitment: 1972-2007 GM 3/4-ton and 1-ton trucks with GM 10.5in 14-bolt rear axle Installation Installation requires removal of the existing carrier and is best performed by an experienced drivetrain technician. Installation time is typically 3-4 hours. Eaton recommends petroleum/mineral based GL-5 80W90 gear oil. Do not use synthetic gear oil or friction modifiers. Detailed installation guides available at eaton.com. Our Take At Strictly SVDs, the GM 14-bolt axle is legendary for its strength and durability, and the Eaton Detroit Truetrac makes it even better. For customers running 4.10 or lower gear ratios in their classic or late-model GM heavy-duty trucks, this differential provides the traction benefits of a limited-slip with absolutely zero maintenance requirements. The helical gear engagement is so smooth that most drivers cannot perceive it working until they realize they are not spinning tires like they used to. This is an excellent upgrade for tow rigs, plow trucks, and any GM HD truck that needs dependable traction in all conditions.