Overview
Within the complex architecture of the ZF WG 171 transmission, the ZF 4656.183.337 LOOSE PARTS kit serves as a critical consolidation of internal fasteners, seals, and positioning components. This OEM genuine assembly is designed to secure the main housing sections and ensure proper fluid channeling under high-torque conditions. The SKU 4656.183.337 is specifically engineered to replace worn or damaged loose hardware that can compromise the structural integrity of the gear train. When paired with a new TRANSMISSION HOUSING, this kit restores the precise clamping force required to prevent internal misalignment.
Symptoms of Failure
- Transmission fluid seepage at housing seams: When the loose parts degrade, the seal between the HOUS.FRONT SECT and the main casing fails, leading to visible oil weeping.
- Intermittent gear slippage under load: Worn fasteners allow the SCREEN SHEET to shift, obstructing oil flow to the clutch packs and causing erratic engagement.
- Metallic rattling from the bell housing: Loose retaining hardware permits the TUBE to vibrate against the housing, producing a distinct noise during deceleration.
- Delayed engagement when shifting from Neutral to Drive: Internal pressure loss due to unsealed connections results in a sluggish response, often misdiagnosed as a valve body issue.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | 4656.183.337 |
| OEM Reference | ZF 4656.183.337 |
| Material Composition | Steel alloy with zinc-nickel plating |
| Weight (approx.) | 0.85 kg (1.87 lbs) |
| Package Contents | Fasteners, dowels, seals, and positioning clips |
| Compatible Housing Type | WG 171 Series split-case design |
Compatibility
This genuine ZF loose parts kit is primarily designed for the WG 171 series, but its hardware dimensions also support the WG 180 and WG 200 transmission models when used in conjunction with the correct rear section. The kit interfaces directly with the HOUSING REAR PART and requires the O-RING for a leak-proof seal. Always verify the CYLINDRICAL PIN alignment before final torque application using the specified CAP SCREW (0636100803) and CAP SCREW (0636100801). For auxiliary mounting points, the CAP SCREW (0636100160) is also required.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101028 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4656301066 | HOUS.FRONT SECT | Front section housing for input shaft support |
| 4656201015 | SCREEN SHEET | Filter screen for oil sump debris protection |
| 4656301037 | TUBE | Fluid transfer conduit between housing sections |
| 0634313514 | O-RING | Sealing ring for hydraulic circuit integrity |
| 0636100803 | CAP SCREW | M10 fastener for housing bolt-down |
| 4656301042 | HOUSING REAR PART | Rear casing section for output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing registration |
| 0636100801 | CAP SCREW | M8 fastener for front section attachment |
| 0636100160 | CAP SCREW | M6 fastener for auxiliary bracket mounting |
Frequently Asked Questions
Q: Can the 4656.183.337 kit be reused after disassembly?
A: No. ZF specifies that all components in this loose parts kit are single-use. The fasteners are torque-to-yield and the seals compress permanently. Reusing them risks oil leaks and gear slippage.
Q: Does this kit include the O-ring for the tube connection?
A: No. The 4656.183.337 kit contains only the loose hardware (screws, pins, clips). You must order the O-RING (0634313514) separately to seal the TUBE connection.
Q: Will this part fit a ZF WG180 transmission?
A: Yes, the hardware dimensions are shared with the WG180 and WG200 series, provided you also install the correct HOUSING REAR PART for your specific model.
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Phone: +86 158 2286 3467 |
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