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  • BMW Differential crown ring spacer for low to high gear ratio swap

    RD3010

    Size

    BMW LSD Carrier Swap Spacer — Low → High Gear Ratio Conversion (3.15–4.45)

    Unlock the full potential of your BMW differential with the RacingDiffs LSD Carrier Swap Spacer. Purpose-built to let you install a high gear ratio LSD carrier (typically 3.15–4.45, common on E30/E36/E34 tds) into a housing originally matched to a low gear ratio carrier (2.64–3.07)—no machining required.

    Key Features
    • Precision engineering: CNC-machined tool steel for exact fit, hardness and long service life.
    • Complete package: Includes spacer and 10 high-grade crown ring bolts for a hassle-free install.
    • Zero machining: Corrects crown-ring position differences between low-ratio and high-ratio carriers.
    • Proven use case: Ideal when sourcing desirable high-ratio LSD carriers from TDS models.
    Performance Benefits
    • Effortless ratio upgrades: Move to 3.15–4.45 for sharper acceleration and track gearing.
    • Factory-like mesh: Maintains proper ring-gear position to achieve correct backlash and contact pattern.
    • Reliable hardware: New crown ring bolts reduce the risk of reusing stretched/aged fasteners.
    Technical Specs / Installation Tips
    Application Swapping a low-ratio LSD carrier (≈2.64–3.07) into a high-ratio carrier housing (≈3.15–4.45).
    Typical platforms BMW E30 / E36 / E34 tds (188 mm medium case; confirm your carrier/housing before ordering).
    Material CNC-machined tool steel spacer + 10× high-grade crown ring bolts.
    Install notes Clean mating faces; seat spacer flat behind the ring gear.
    Use medium-strength threadlocker on crown ring bolts; torque in a star pattern to BMW spec.
    After assembly: set backlash to spec and verify contact pattern with marking compound.
    Re-check torque and backlash after first heat cycle/track session.
    What’s in the Box
    • 1 × Precision-crafted spacer
    • 10 × High-grade crown ring bolts