Bratex limited-slip differential for Porsche 911 / 915 / 930 with 18 splines

Bratex helical limited-slip differentials distribute torque between the wheels, concentrating more torque on the wheel with better traction, which improves performance and handling, especially in low grip situations. The helical gear manages friction distribution within the differential. When torque is applied to the helical gear system, a force is created that pushes the gear against the differential body, generating friction. Greater torque results in greater thrust force, directly proportional to the amount of torque. This allows the Bratex differential to manage a considerable traction imbalance, even in high-power conditions, such as exiting a corner at high speed. However, in low torque conditions, the differential can differentiate silently and smoothly, making it very suitable for normal road driving. The Bratex differential uses the popular parallel-axis helical gear configuration, optimized for even load distribution. It is designed with a torque ratio of 5:1, meaning that if one wheel loses traction, the wheel with more grip can receive five times more torque than the spinning wheel. However, five times zero is still zero, so all these helical limited-slip differentials work best when both wheels are on the ground and the spinning wheel still retains some traction. In practice, this rarely poses a problem, as there is always some resistance in the spinning wheel; however, some drivers skillfully use left-foot braking to partially lock the spinning wheel.

Compatible vehicles:

Porsche 911 (18 splines)

Porsche 915 (18 splines)

Porsche 930 (18 splines)

Data sheet

Supplier part number

HLF180/18