NEW STOCK! Wavetrac ATB Differential For 911 Late 915 and 930 - Fine Spline (TRA 40 309 150WK)

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IN STOCK READY TO SHIP TODAY! Automatic Torque Biasing (ATB) Differential - 43 Tooth Fine Spline - Differential With Automatic Torque Bias / Patented Wave Ramp Design / ARP High St rength Fasteners1977-1986 Porsche 911 915 Transmission1978-1988 930 Turbo 930 TransmissionWavetrac USA - Sold Each - 1 Per Car 43 Tooth Fine Spline TypeAlternate Part Numbers: TRA 40 309 150 WK / TRA.40.309.150.WK / TRA40309150WK / 40 309 150 WK / 40-309-150-WK / 40.309.150.WK / 40309150WK / LSD 02/16/2026 Show more