BMW non M Gear ratio Swap set – 188K
BMW non M Gear ratio Swap set – 188K, RacingDiffs part no. RD3057. A RacingDiffs part for differential rebuilds, gear ratio swaps and LSD setup.
Key Features
- Complete kit: Everything required for a seamless gear ratio change with factory-level precision.
- Performance gains: Tailor acceleration, top speed and gear spacing to your driving style and tracks.
- OEM-grade quality: Components meet or exceed OEM specs for durability and long service life.
What's Included
- Adjustment Shim Set / C-Clip Set: ensures proper alignment and backlash adjustment.
- Pinion Oil Seal: maintains lubrication and prevents leaks.
- Large Pinion Bearing: to press onto the new pinion gear.
- Crush Sleeve Shim: for setting correct pinion preload.
- Pinion Depth Shim Set (3.3–3.7 mm): precise pinion depth positioning.
Technical Specs
| Spec | Value |
|---|---|
| Pinion depth | Set using the Pinion Depth Shim Set (3.3–3.7 mm). Verify with contact pattern. |
| Pinion preload | Establish with the Crush Sleeve Shim per BMW specs (feel for smooth rotation, no end play). |
| Backlash | Adjust via Adjustment Shim / C-Clip Set until within spec; measure at ring gear with a dial indicator. |
| Sealing | Install the new Pinion Oil Seal; lightly oil lips; inspect yoke surface for grooves. |
| Fasteners | Clean threads, apply medium-strength threadlocker to ring-gear bolts, torque in a star pattern to BMW spec. |
Fitment
- Use the BMWFans.info database: Follow this guide video to identify your differential type and parts: How to check diff type.
- VIN check: Send us the last 7 digits of your VIN and we’ll confirm the correct set for your car: Contact RacingDiffs.
Specifications
| Spec | Value |
|---|---|
| Brand | RacingDiffs |
| Part number | RD3057 |
| Version | 188K |
| Weight | 1,5 kg |
RacingDiffs
Founded in Belgium, RacingDiffs is a specialist developer of limited slip differential conversions and upgrades for popular rear-wheel-drive platforms. Their bolt-in LSD kits convert open differentials into performance units without a full housing swap — a cost-effective solution for track day and drift enthusiasts seeking better traction and balance.
Official page: racingdiffs.com
Official page: racingdiffs.com
BMW non M Gear ratio Swap set – 188K
320.65€
Excl. VAT: 265.00€
Tags: RS-RD-RD3057,