ZF 4681.084.005 4 BP 230 BASICPOWER Transmission Assembly | Complete Unit

Overview

The ZF 4681.084.005 4 BP 230 BASICPOWER Transmission Assembly | Complete Unit is a fully assembled drop-in replacement for the BP 230 series, designed to restore original shifting performance and torque capacity in medium-duty ZF transmissions. This complete unit integrates the planetary gear set, clutch packs, and valve body into a single, pre-tested assembly, eliminating the need for piecemeal rebuilding. The SKU 4681.084.005 is engineered to handle continuous power loads up to 230 Nm, making it a critical component for buses, construction vehicles, and agricultural machinery. It sits at the heart of the transmission, directly coupling the torque converter to the output shaft, and must be installed with a properly sealed TRANSMISSION HOUSING to prevent contamination and ensure correct alignment.

Symptoms of Failure

When the ZF 4681.084.005 assembly begins to fail, operators often notice delayed engagement when shifting from neutral to drive, a classic sign of worn clutch discs or degraded seals. Another common symptom is intermittent gear slipping under moderate acceleration, particularly in 3rd and 4th gears, which indicates internal hydraulic pressure loss. You may also detect dark, burnt-smelling transmission fluid with metallic particles, signaling advanced wear of the planetary bearings. Finally, erratic shifting or harsh upshifts can occur when the valve body spools become stuck due to debris, requiring immediate replacement of the complete unit.

Technical Specifications

Compatibility

This complete unit is specifically designed for the ZF BP 230 Series transmissions, including models such as the WG180, WG200, and WG210. It is also compatible with the 4 BP 230 variant found in early 2000s MAN and Neoplan bus chassis. The assembly directly replaces the original unit in any ZF transmission that uses a 230 Nm torque converter interface and a 4-speed planetary layout. For proper installation, ensure the HOUS.FRONT SECT and HOUSING REAR PART are free of cracks and wear, as these sections directly mate with the assembly. Additionally, the HOUSING REAR SECTION must be inspected for warping to guarantee concentric alignment of the output shaft.

Related Components

Frequently Asked Questions

Q: Can I install this complete unit without replacing the housing sections?
A: Yes, but we strongly recommend inspecting the TRANSMISSION HOUSING for scoring or cracks. Any housing damage will compromise the new assembly’s alignment and lead to premature failure.

Q: What is the typical service life of the 4681.084.005 assembly?
A: Under normal operating conditions with regular fluid changes, this unit can last 250,000 to 300,000 km. Harsh towing or off-road use may reduce this interval.

Q: Does this assembly include the necessary cap screws and fixing plates?
A: No, the complete unit ships without fasteners. You will need to order CAP SCREW (0636100801) and FIXING PLATE (4656301148) separately for installation.