Overview
The ZF 4651.199.044 LOOSE PARTS set is a critical OEM genuine service kit designed specifically for the WG 100 Series transmission. This assembly contains the necessary fasteners, seals, and positioning components required to secure internal sub-assemblies within the transmission housing. The SKU 4651.199.044 is typically utilized during a full overhaul or when replacing major structural components such as the 4651101007: TRANSMISSION HOUSING or the 4651301029: HOUSING. Without this loose parts kit, proper torque retention and fluid sealing cannot be guaranteed, leading to premature wear of the gear train.
Symptoms of Failure
- Transmission fluid seepage at housing joints: When the fasteners and sealing elements within the 4651.199.044 kit degrade, you will notice oil weeping from the mating surfaces between the main housing and the 4651301024: HOUSING.
- Loose or rattling internal components: A worn kit allows the valve body or clutch pack retainers to shift, producing a metallic rattle during gear changes, particularly in the WG100 under load.
- Intermittent gear slippage under torque: Loss of clamping force from degraded loose parts can cause the clutch packs to momentarily lose grip, resulting in delayed engagement or slipping in 3rd and 4th gears.
- Increased vibration from the bell housing area: Missing or fatigued hardware from this kit leads to misalignment of the pump drive, generating low-frequency vibration at idle.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4651.199.044 |
| OEM Reference | ZF 4651.199.044 |
| Kit Contents | Bolts, washers, positioning pins, retaining rings |
| Material | Steel (zinc-plated), nitrile rubber seals |
| Weight (approx.) | 0.45 kg (1.0 lb) |
| Application | WG 100 Series internal fastening system |
Compatibility
This OEM genuine part is engineered for the ZF WG 100 transmission series. Based on the structural design of the loose parts kit, it is also compatible with the WG 120 and WG 150 models that share the same housing bolt pattern. The kit is not recommended for the WG 180 or WG 200 series, as those units utilize a different fastener pitch and require the 0636101032: CAP SCREW and 0630361028: SEALING CAP from a separate assembly. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101007 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4651301029 | HOUSING | Rear cover housing for output shaft |
| 0634303928 | O-RING | Seals fluid passage between housings |
| 4651301024 | HOUSING | Intermediate housing for clutch pack |
| 4651203002 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4651303005 | SCREEN SHEET | Coarse debris screen for sump |
| 0636101032 | CAP SCREW | High-tensile fastener for housing |
| 0630361028 | SEALING CAP | Protects threaded ports from debris |
| 4475280060 | SCREW PLUG | Seals drain and fill ports |
| 0634303312 | O-RING | Seals screw plug to housing |
