Overview
The ZF 0750.119.099 ROLLER SET is a precision-engineered bearing assembly designed for the WG 150 Series transmissions. This OEM genuine part reduces rotational friction within the planetary gear train, ensuring smooth torque transfer and load distribution across the clutch packs. The SKU 0750.119.099 sits directly inside the main shaft housing, where it supports the sun gear and planetary carriers. When paired with a robust TRANSMISSION HOUSING, this roller set maintains axial alignment and prevents metal-to-metal contact under high-stress operating conditions.
Symptoms of Failure
- Intermittent gear slipping under load: Worn rollers cause uneven pressure on the planetary gears, leading to momentary loss of torque during acceleration or hill climbs.
- Metallic grinding noise from the transmission sump: As the roller set degrades, small metal fragments contaminate the oil, producing a distinct whining or grinding sound at low RPM.
- Delayed engagement when shifting from Neutral to Drive: Excessive roller wear increases internal clearance, requiring the hydraulic system to build higher pressure before clutch packs engage.
- Visible oil leaks near the output shaft seal: A failing roller set can misalign the shaft, damaging the seal lip and causing fluid seepage around the bell housing.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0750.119.099 |
| OEM Reference | ZF 0750.119.099 |
| Material | Case-hardened 20MnCr5 steel |
| Roller Diameter | 8.0 mm |
| Number of Rollers | 22 |
| Outer Race Width | 32.5 mm |
| Weight | 0.85 kg |
| Operating Temperature Range | -40°C to +120°C |
| Hardness (Rockwell) | HRC 58-62 |
Compatibility
This roller set is engineered for the ZF WG 150 Series, but it also fits the WG 180 and WG 200 models when used with the correct TRANSMISSION HOUSING. It is compatible with WG 150, WG 180, WG 200, and WG 250 transmissions manufactured between 1998 and 2015. Always verify the housing bore diameter before installation; the 0750.119.099 requires a housing with a 72 mm inner race seat. For proper identification, attach the TYPE PLATE after reassembly, and secure the assembly using a GROOVED STUD to prevent axial play.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101108 | TRANSMISSION HOUSING | Encloses the gear train and supports the roller set |
| 4642301208 | TRANSMISSION HOUSING | Alternate housing for WG 180/200 models |
| 0730365125 | TYPE PLATE | Identification label for transmission model |
| 0631311009 | GROOVED STUD | Secures the roller set cage to the housing |
| 4642301168 | SCREEN SHEET | Filters debris from the hydraulic circuit |
| 4642301169 | SCREEN SHEET | Fine-mesh filter for high-pressure oil |
| 0636100621 | HEXAGON SCREW | Fastens the housing cover |
| 0630361029 | SEALING CAP | Prevents oil leakage from the housing port |
| 4642306254 | ADAPTER | Connects the housing to the torque converter |
| 0634303340 | O-RING | Seals the adapter-to-housing joint |
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