Heavy-Duty Preload Shims for BMW ZF LSD - E30, E36, E34

Factory preload shims can lose tension or become damaged due to heat and wear, especially in older ZF clutch-type differentials. When preload drops, the LSD loses locking force and traction performance suffers.

Replacing the Belleville washers during a rebuild restores the initial preload and helps the differential work as intended.

• 30% stronger than original shims for increased preload and better lock.
• Extra hardened to 55 HRC for improved durability and heat resistance.
• Better traction and locking performance in all driving conditions.
• Longer service life under aggressive use and high temperatures.

Available for BMW ZF clutch-type LSD units in the following sizes:

• 168mm LSD
• 188mm LSD
• 210mm LSD

Commonly used in models such as:

• BMW E30
• BMW E36
• BMW E34

If you are unsure which size fits your vehicle, simply send us your VIN and we will confirm the correct option.

The 210mm preload shims do not fit GKN differentials found in:

• BMW E46 M3
• BMW E92 M3
• BMW E60 M5
• BMW E63 / E64 M6
• BMW Z4 M

For free play solutions in these models, see our LSD Clutch Pack + Free Play Delete Kits.

When replacing preload shims, we also strongly recommend changing the clutch plates, as worn clutches are often the main reason for overheating and reduced LSD performance.

Replacing both components together ensures the best result from your differential rebuild.

RacingDiffs develops high-quality BMW differential parts designed to improve durability, locking force and overall drivetrain reliability.

Our preload shims are engineered for enthusiasts and workshops who want a stronger and more dependable alternative to factory components.