Overview
The ZF 4681.337.003 COVER is a critical sealing and protective component engineered for the BP 210, BP 230, WG 190, and WG 210 series transmissions. This OEM genuine part, identified by SKU 4681.337.003, mounts directly onto the transmission housing to shield internal gear assemblies from contaminants while maintaining proper fluid pressure. It interfaces with the 4657101088: TRANSMISSION HOUSING to create a sealed environment essential for hydraulic actuation and gear lubrication. Without this cover, the transmission’s internal components would be exposed to debris, leading to accelerated wear and system inefficiency.
Symptoms of Failure
- Oil leaks around the cover perimeter: When the 4681.337.003 gasket surface degrades, transmission fluid seeps past the seal, leaving visible puddles under the vehicle. This is a common “ZF transmission cover leak” issue.
- Gear slipping under load: A compromised cover allows air ingress, reducing hydraulic pressure and causing clutches to slip during acceleration. This often triggers “BP 210 gear slipping” search queries.
- Contaminated transmission fluid: Cracks or warping in the cover let dirt and moisture enter, leading to gritty fluid and erratic shifting. This symptom is frequently reported as “WG 190 dirty fluid problem.”
- Increased operating noise: Loss of structural integrity in the cover allows vibration transmission, producing a whining or grinding sound from the transmission housing area.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4681.337.003 |
| Material | Die-cast aluminum alloy |
| Weight | 1.2 kg (2.65 lbs) |
| Dimensions (L x W x H) | 210 mm x 140 mm x 45 mm |
| OEM Reference | ZF 4681.337.003 |
| Seal Type | Integrated gasket groove |
Compatibility
This cover is engineered for ZF’s modular transmission families. It directly fits the BP 210 and BP 230 series, as well as the WG 190 and WG 210 series. Based on its mounting pattern, it is also compatible with earlier WG 180 and WG 200 variants when used with the appropriate 4657201183: HOUS.FRONT SECT and 4657201184: HOUSING REAR PART. For full assembly integrity, pair it with the 4657298111: HOUSING REAR SECTION to ensure proper alignment of internal shafts.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101088 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4657201183 | HOUS.FRONT SECT | Front section housing input shaft |
| 4657201184 | HOUSING REAR PART | Rear section supporting output flange |
| 4657298111 | HOUSING REAR SECTION | Extended rear housing for longer transmissions |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for cover positioning |
| 0636100801 | CAP SCREW | Fastener for cover attachment |
| 4681301015 | FIXING PLATE | Retainer for internal screen sheets |
| 4681301016 | SCREEN SHEET | Fine mesh filter for oil return |
| 4681301017 | SCREEN SHEET | Coarse mesh pre-filter for debris |
| 0636100803 | CAP SCREW | Bolt for securing screen assembly |
Frequently Asked Questions
Q: Can I reuse the old gasket when installing the 4681.337.003 cover?
A: No. Always replace the gasket or sealant surface when installing this cover. Reusing old seals is the primary cause of post-service oil leaks in BP 210 and WG 190 transmissions.
Q: Does this cover fit the ZF WG 180 series without modification?
A: Yes, it is compatible with WG 180 when used with the correct housing sections. Verify that your 4657201183: HOUS.FRONT SECT matches the cover’s bolt pattern before installation.
Q: What torque specification should I use for the cap screws?
A: Use 25 Nm (18.4 lb-ft) for the 0636100801: CAP SCREW fasteners. Over-torquing can warp the cover and cause fluid leaks.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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