Overview
The ZF 4651.183.037 LOOSE PARTS for BP230 is a critical OEM genuine component designed for the BP 230 series transmission. This assembly kit contains the essential loose hardware—including seals, retainers, and small fasteners—that secure internal transmission elements and prevent fluid migration between chambers. As an integral part of the BP230’s hydraulic circuit, the 4651.183.037 ensures proper clamping force and alignment of the valve body and clutch packs. When installed alongside the TRANSMISSION HOUSING and the HOUS.FRONT SECT, this loose parts set maintains the structural integrity of the entire assembly. The SKU 4651.183.037 is factory-matched to the BP230 platform, guaranteeing a precise fit without modification.
Symptoms of Failure
- Oil leaks at the transmission housing seam: Worn or missing loose parts cause pressurized ATF to seep past the HOUSING REAR PART interface, leaving visible drips under the vehicle.
- Intermittent gear slipping under load: Degraded retainers allow clutch pack clearance to increase, leading to delayed engagement and torque loss during acceleration.
- Erratic shift timing: Loose fasteners in the valve body area cause hydraulic pressure fluctuations, resulting in harsh or delayed shifts between gears.
- Unusual whining or grinding noises: When the HOUSING REAR SECTION loses its securing hardware, bearing preload changes, producing audible mechanical distress.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4651.183.037 |
| OEM Reference | ZF BP230 Series |
| Material | Steel alloy with zinc-nickel plating |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions (L x W x H) | 180 mm x 120 mm x 40 mm |
| Hardware Included | Retaining rings, dowel pins, sealing washers |
| Torque Specification | 25 Nm (18.4 ft-lbs) for cap screws |
Compatibility
This loose parts kit is engineered specifically for the ZF BP230 transmission family. It is also compatible with the following ZF models that share the same housing architecture: WG180, WG200, WG210, and WG220. The 4651.183.037 kit interfaces directly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT, making it a universal fit for all BP230 variants produced after 2015. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101078 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201166 | HOUS.FRONT SECT | Front section housing for pump and converter |
| 4657201168 | HOUSING REAR PART | Rear housing segment for output shaft |
| 4657298101 | HOUSING REAR SECTION | Complete rear housing assembly |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing mating |
| 0636100801 | CAP SCREW | Fastener for housing bolts |
| 4656301148 | FIXING PLATE | Secures valve body to housing |
| 4657301032 | SCREEN SHEET | Filter screen for hydraulic fluid |
| 4657301033 | SCREEN SHEET | Secondary filter screen for oil return |
| 0636100803 | CAP SCREW | High-torque fastener for rear housing |
Frequently Asked Questions
Q: Can I reuse the 4651.183.037 loose parts from an old transmission rebuild?
A: No. ZF recommends always replacing this kit with new OEM hardware because the retainers and seals are single-use components that lose elasticity after initial torque application.
Q: Does this kit include the cap screws for the housing?
A: No. The 4651.183.037 contains only loose parts such as pins and washers. For housing fasteners, you will need separate CAP SCREW parts like 0636100801 or 0636100803.
Q: Will this part work with the ZF WG200 transmission?
A: Yes, the 4651.183.037 is fully compatible with the WG200, as it shares the same BP230-derived housing architecture. Always cross-reference your transmission serial number.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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