Overview
The ZF 4681.054.026 4 BP 210 BASICPOWER Transmission Assembly is a complete, factory-matched unit designed for heavy-duty commercial and off-highway applications. This assembly integrates the hydraulic control module, clutch pack, and planetary gearset into a single, ready-to-install component. As a core element within the BP 210 and BP 230 series, it manages torque distribution and gear ratio selection under high-load conditions. The SKU 4681.054.026 denotes a specific revision of the BASICPOWER assembly, ensuring precise fitment and OEM-level performance. Engineers will recognize this unit as a direct replacement for worn or failed assemblies, eliminating the need for individual component rebuilding.
Symptoms of Failure
When the ZF 4681.054.026 assembly begins to degrade, operators will notice distinct operational issues. Look for these specific failure indicators to diagnose the problem early:
- Delayed or harsh engagement when shifting from Neutral to Drive or Reverse – This indicates internal hydraulic pressure loss or worn clutch friction plates within the assembly.
- Intermittent gear slipping under load, especially on inclines – A common symptom of fatigued planetary gear bearings or degraded sealing rings, often searched as “ZF transmission slipping uphill.”
- Visible oil leakage around the bell housing or output shaft seal area – Caused by cracked housing or worn O-rings in the assembly, leading to low fluid levels and eventual overheating.
- Unusual whining or grinding noise during deceleration – Points to bearing wear or gear tooth damage inside the BASICPOWER unit, often described as “transmission whine when slowing down.”
Technical Specifications
| Parameter | Value |
|---|---|
| Assembly Weight | 42.5 kg (93.7 lbs) |
| Overall Length | 485 mm |
| Housing Material | High-strength aluminum alloy (A356-T6) |
| Clutch Plate Material | Sintered bronze on steel |
| Maximum Input Torque | 2,100 Nm |
| OEM Reference Number | 4681.054.026 |
| Bolt Torque Specification | 85 Nm (bell housing bolts) |
Compatibility
This complete unit is engineered for the ZF BASICPOWER transmission family, specifically the BP 210 and BP 230 series. It is a direct fit for the following ZF transmission models and their variants:
- ZF WG180 (all sub-variants with BP210/BP230 designation)
- ZF WG200 (late-model units with BASICPOWER hydraulic control)
- ZF 4 BP 210 (standard and heavy-duty configurations)
- ZF 4 BP 230 (high-torque applications)
Always verify the transmission serial number and housing casting marks before installation. This assembly is not compatible with the earlier 3 BP series or the Ecomat family without adapter kits.
