BMW 188mm LSD – E30, E36, E34, Z3 Limited Slip Differential

BMW 188mm LSD – E30, E36, E34, Z3 Limited Slip Differential, RacingDiffs part no. RD1002, RD1023. It is a complete clutch-type limited slip differential unit that replaces the open or worn factory differential carrier.

Key Features

• Fully forged construction: Forged internals + forged housing for maximum strength and longevity.
• Adjustable ramp settings: 30/30 (2-way), 30/60 (1.5-way), 50/65 (smooth lock).
• Six moly-ceramic clutch plates: Heat-resistant, consistent grip; lifetime warranty included.
• Track & street ready: Built for continuous high performance while remaining civil on the road.
• Optimized NVH: Proper preload + quality LSD oil deliver quiet, vibration-free operation.

Technical Specs

Installation Notes

• Carrier-adjustment shims required: Needed to set preload and backlash correctly.
• Shims let you: Dial factory backlash, center the ring gear for a clean contact pattern, eliminate whine/heat/premature wear.
• TIP: We stock shim packs in 0.1 mm steps to fine-tune preload and backlash without chasing OEM spacers.
• Watch before you wrench: Our 8-minute video covers bearing pressing, backlash measurement (dial indicator), shim selection, and checking contact with marking compound.

Fitment

• E30: 320i, 320is, 323i, 324td, 325i, 325e, 325ix, M3
• E36: 320i, 323i, 325i, 325tds, 328i, M3 S50
• E28: 518i, 520i, 524td, 525i, 525e, 528i, 533i, 535i
• E34: 518i, 520i, 524tds, 525i, 525ix, 530i, 535i
• E24: 628i, 633CSi, 635CSi
• E23: 728i, 732i, 733i, 735i
• E32: 730i, 735i
• E38: 730i (pre-facelift)
• Z3: 2.2i, 2.5i, 2.8i, 3.2 M
• Z1: M20

Versions

Specifications