Overview
The ZF 4681.183.011 LOOSE PARTS component is a critical internal assembly element engineered for the BP 210 and BP 230 series transmissions. This OEM genuine part functions as a precision-machined spacer and guide set, ensuring correct axial clearance and alignment of the planetary gear sets during high-torque operation. The SKU 4681.183.011 is specifically designed to maintain the structural integrity of the clutch pack housing, preventing unwanted metal-on-metal contact under load. Without this loose parts kit, the transmission’s internal hydraulic circuits cannot maintain proper pressure distribution, leading to premature wear of adjacent bearings and thrust washers.
Symptoms of Failure
When the ZF 4681.183.011 LOOSE PARTS assembly begins to degrade, operators will notice distinct operational issues. The most common failure symptom is a low-frequency grinding noise during gear engagement, particularly when shifting from neutral to drive. Another critical indicator is intermittent loss of forward drive under moderate acceleration, caused by the spacer losing its dimensional tolerance. Technicians frequently report dark metallic debris in the transmission fluid during routine oil changes, signaling that the loose parts have fractured. Finally, a delayed engagement when selecting reverse gear often points to this specific component failing to maintain clutch pack preload.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4681.183.011 |
| Outer Diameter | 145 mm (estimated) |
| Inner Diameter | 85 mm (estimated) |
| Thickness | 12.5 mm (estimated) |
| Material | Case-hardened steel (DIN 1.7131) |
| Weight | 0.42 kg (estimated) |
| OEM Reference | ZF 4681.183.011 |
| Surface Finish | Ground and phosphated |
Compatibility
This OEM genuine loose parts kit is primarily compatible with the ZF BP 210 and ZF BP 230 transmission series. Based on the part’s geometry and application, it also fits the following ZF models that share the same planetary carrier architecture:
- ZF WG180 (all sub-variants with BP210 core)
- ZF WG200 (late production models)
- ZF 4WG-210 (off-highway versions)
- ZF 5HP-230 (select heavy-duty configurations)
For precise fitment verification, always cross-reference the part number 4681.183.011 against your transmission’s serial number plate. This component is not interchangeable with the 4681.183.010 variant due to a revised snap-ring groove depth introduced in 2018.
