Overview
The ZF 4642.199.746 LOOSE PARTS kit is a critical service component designed specifically for the WG 180 series transmission. This OEM genuine assembly contains the necessary loose hardware and fasteners required to secure internal valve bodies and hydraulic control modules within the main transmission casing. The SKU 4642.199.746 ensures that every bolt, washer, and clip meets ZF’s exacting tolerances for clamping force and vibration resistance. When rebuilding a WG180, this kit replaces all worn or corroded fasteners that can compromise hydraulic pressure integrity. It works in conjunction with the 4644101131: TRANSMISSION HOUSING and the 4644301228: TRANSMISSION HOUSING to create a sealed, pressurized environment for gear engagement.
Symptoms of Failure
When the ZF 4642.199.746 LOOSE PARTS begin to degrade, operators typically notice three distinct failure modes. First, intermittent gear slippage under load occurs as loose fasteners allow valve body movement, disrupting clutch pack engagement. Second, external oil seepage around the control module gasket appears when retaining bolts lose their torque specification, often mistaken for a housing crack. Third, erratic shift timing or harsh engagement develops when internal clips fatigue, causing spool valves to stick. Fourth, rattling noises from the transmission pan area indicate loose components that can damage the 0730365067: TYPE PLATE identification tag.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4642.199.746 |
| OEM Reference | ZF 4642.199.746 |
| Material Composition | Case-hardened steel (fasteners), nitrile rubber (seals) |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions (Kit) | 180 x 120 x 40 mm |
| Thread Pitch | M6 x 1.0, M8 x 1.25 |
| Torque Specification | 12-15 Nm (valve body bolts) |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This LOOSE PARTS kit is engineered primarily for the ZF WG 180 series transmissions found in medium-duty trucks and construction equipment. It also fits the WG 200 series with identical valve body bolt patterns. The kit is compatible with WG 160 and WG 210 variants when used in conjunction with the 0631311009: GROOVED STUD for alignment. Always verify the transmission serial number against ZF’s service bulletin before installation. The kit does not fit the older WG 150 series due to different thread pitch standards.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101131 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301228 | TRANSMISSION HOUSING | Secondary housing for clutch packs |
| 0730365067 | TYPE PLATE | Identification tag with serial number |
| 0631311009 | GROOVED STUD | Alignment dowel for valve body |
| 4644301298 | COVER PLATE | Seals hydraulic control cavity |
| 0634306525 | O-RING | Prevents fluid bypass at joints |
| 0636305026 | SCREW PLUG | Seals pressure test ports |
| 4475280078 | ADAPTER | Converts line pressure to valve body |
| 0501316470 | BREATHER | Equalizes internal air pressure |
| 4644301279 | SCREEN SHEET | Filters debris from hydraulic fluid |
