BMW 188 mm medium‑case clutch‑type LSD by RacingDiffs – fits E30 E36 E34, forged internals and adjustable ramps

BMW medium case LSD diagram of lock up to 75%

BMW 188mm (Medium case) LSD | Clutch-type, Fully adjustable

Name: BMW 188mm (Medium case) LSD | Clutch-type, Fully adjustable
Brand: RacingDiffs
SKU: RD1002
Price: 1499.0 EUR
Availability: InStock

RD1002

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1.849,00€1.499,00€

BMW 188mm Limited Slip Differential (LSD) Unit — Unlock Superior Performance

Elevate your BMW’s capabilities with RacingDiffs’ BMW 188mm Limited Slip Differential (LSD) Unit. Tailored for enthusiasts seeking peak performance, durability, and adaptability, this fully forged, adjustable LSD transforms your drive on road and track.

Forged to Last: Fully forged internals and housing provide extraordinary strength and longevity—reliability when you need it most.

Adaptable Performance: Three ramp-angle settings let you tailor behavior to your driving style:

30/30 — aggressive 2-way for high-intensity drifting.
30/60 — versatile 1.5-way for a wide range of motorsports.
50/65 — smoother lock for daily comfort + track-day fun.

Innovative Clutch Pack (Lifetime Warranty): Equipped with six Molybdenum-ceramics clutch plates for sustained peak performance in any conditions—covered by our lifetime warranty.

Quiet, Composed Operation: With optimal preload and quality LSD oil (e.g., Ravenol Racing 75W-140), the unit runs without unwanted noise or vibration.

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.

Performance Benefits

Superior traction: Dramatically improves acceleration and corner-exit drive.
Enhanced stability: Greater control and predictability at the limit.
Versatile handling: Easily tune behavior for drift, rally, circuit, or spirited street.
Durability under load: Forged architecture resists wear, heat, and shock loads.

Technical Specs / Installation Tips

Differential size	BMW 188 mm
Ramp options	30/30 (2-way), 30/60 (1.5-way), 50/65 (smooth lock)
Clutch pack	6 × molybdenum-ceramics clutch plates (lifetime warranty)
Oil recommendation	Ravenol Racing 75W-140 (or equivalent high-quality LSD oil)
Backlash target	0.06–0.10 mm on most BMW ring-and-pinion sets

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.