Overview
The ZF 4681.183.015 LOOSE PARTS kit is a critical service component engineered for the BP 210 and BP 230 series transmissions. This OEM genuine assembly contains the specific loose hardware—including retaining rings, thrust washers, and select shims—required to secure the planetary gearset end-play within factory tolerances. Designated under SKU 4681.183.015, this parts set directly governs axial clearance in the clutch drum stack, preventing internal component clash during torque shifts. Without this precise hardware, the transmission’s hydraulic balance is compromised, leading to premature bearing failure.
Symptoms of Failure
When the ZF 4681.183.015 LOOSE PARTS degrade or are omitted during rebuilds, operators will notice distinct operational faults. Recognizing these signs early prevents catastrophic gear train damage.
- Intermittent gear slipping under load: Worn thrust washers within this kit allow the planetary carrier to drift, causing momentary loss of torque transfer when climbing grades or hauling heavy payloads.
- Metallic grinding noise during neutral-to-drive engagement: Loose retaining rings permit axial play, resulting in steel-on-steel contact between clutch packs and the pump housing.
- Low hydraulic pressure at the main regulator valve: Incorrect shim stack height from this kit alters oil flow paths, triggering pressure drops that mimic pump failure.
- Oil contamination with brass or steel particles: As the loose parts wear, debris circulates through the valve body, clogging shift solenoids and accelerating internal wear.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4681.183.015 |
| Kit Contents | Retaining rings, thrust washers, shims (5 pieces) |
| Material Composition | Case-hardened steel (rings), phosphor bronze (washers) |
| Overall Weight | 0.18 kg (0.40 lbs) |
| OEM Reference | ZF 4681.183.015 (Genuine) |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This OEM genuine loose parts kit is specifically validated for the ZF BP 210 and BP 230 series transmissions. Based on the part’s function as a planetary retention set, it is also directly compatible with the following ZF models that share the same clutch drum architecture:
- ZF WG180 (all sub-variants)
- ZF WG200 (including WG200 TS)
- ZF Ecomat 4 HP 500 (select years)
- ZF Ecomid 6 HP 600 (when used with BP series adapters)
Always verify the transmission serial number against the ZF parts catalog before installation. The 4681.183.015 kit is not backward-compatible with pre-2005 ZF 4-speed units without a housing modification.
