Overview
The ZF 4681.298.011 HOUSING REAR SECTION is a critical structural component designed for the BP 210 and BP 230 series transmissions. This OEM genuine part encloses the rear planetary gear set and output shaft assembly, providing precise alignment and sealing for the transmission’s rear section. As the primary housing that supports the output bearing and oil seal, the SKU 4681.298.011 ensures that internal hydraulic pressure is maintained while protecting internal components from external contaminants. This housing section is machined from high-strength cast iron to withstand the torsional stresses and thermal expansion inherent in heavy-duty commercial vehicle operations.
Symptoms of Failure
Persistent Oil Leaks at the Rear Seal Area
When the 4681.298.011 housing rear section develops cracks or warpage, transmission fluid often escapes past the rear output seal. This manifests as visible drips or wet spots under the bell housing area, particularly after the vehicle has been parked overnight.
Abnormal Gear Slipping or Delayed Engagement
A compromised housing can misalign the output shaft, causing erratic gear engagement. Operators may notice the transmission slipping out of gear under load or experiencing a noticeable lag when shifting from neutral to drive.
Excessive Vibration During Highway Speeds
Wear or distortion in the housing rear section allows the output shaft to wobble, transmitting vibrations through the driveline. This symptom is most pronounced at sustained highway speeds and may worsen as the housing degrades further.
Contaminated Transmission Fluid
If the housing develops internal cracks, debris or moisture can enter the transmission cavity. This contamination leads to dark, gritty fluid and accelerated wear on planetary gears and bearings.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4681.298.011 |
| Material | High-Grade Cast Iron (GGG-40) |
| Overall Length | 285 mm |
| Maximum Diameter | 210 mm |
| Weight | 8.4 kg (18.5 lbs) |
| Bolt Hole Pattern | 6 x M12 on 180 mm PCD |
| OEM Reference | ZF 4681.298.011 |
| Surface Finish | Phosphate Coated |
Compatibility
This genuine ZF housing rear section is engineered for direct fitment on the following transmission models within the BP series family. While primarily designed for BP 210 and BP 230 variants, it also serves as a replacement part for earlier WG series units that share the same rear housing architecture.
- ZF BP 210 (all sub-variants including BP 210 B and BP 210 C)
- ZF BP 230 (standard and heavy-duty configurations)
- ZF WG 180 (late production models with BP-style rear housing)
- ZF WG 200 (when retrofitted with BP series output components)
- ZF Ecomid BP 210 (mid-range torque applications)
Always verify the bolt pattern and output shaft diameter against your existing housing before installation. This part is not compatible with HP series or older 4-speed WG models without adapter kits.
