Overview
The ZF 0730.007.636 SHIM is a precision-engineered adjustment component designed specifically for the WG 65 series of heavy-duty transmissions. This OEM genuine part functions as a critical spacer within the planetary gearset assembly, ensuring correct axial clearance between rotating and stationary components. By maintaining precise tolerances, the 0730.007.636 shim prevents metal-on-metal contact and supports optimal load distribution during high-torque operations. This shim is installed directly inside the TRANSMISSION HOUSING, where it sits between the bearing races and the housing shoulder to compensate for manufacturing tolerances and wear over time.
Symptoms of Failure
- Gear slipping under load – When the shim wears or compresses beyond specification, axial play increases, causing the clutch packs to lose engagement pressure during acceleration or hill climbing.
- Low-frequency humming from the transmission – A worn 0730.007.636 shim allows the planetary gears to shift out of alignment, producing a distinct droning noise that intensifies with vehicle speed.
- Metallic debris in the oil pan – As the shim deteriorates, fine steel particles contaminate the transmission fluid, often visible during routine oil changes as glitter-like sediment.
- Delayed engagement when shifting from Neutral to Drive – Excessive clearance caused by a collapsed shim forces the hydraulic system to compensate, resulting in a noticeable lag before power transfers to the wheels.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0730.007.636 |
| Material | Hardened spring steel (C67S) |
| Thickness | 1.50 mm ± 0.05 mm |
| Outer Diameter | 68.0 mm |
| Inner Diameter | 52.5 mm |
| Weight | 18 grams |
| OEM Reference | ZF 0730.007.636 |
| Surface Finish | Phosphate coated |
Compatibility
This shim is engineered for the ZF WG 65 transmission series, which includes models such as the WG65, WG80, WG120, WG150, WG180, and WG200. It is also compatible with select off-highway variants like the WG65-2 and WG65-3 used in construction and agricultural equipment. The 0730.007.636 shim is installed in conjunction with the HOUSING (part 4616301307) and the HOUSING (part 4616301309) to form the complete bearing support assembly. Always verify the shim thickness using a micrometer before installation, as multiple shim variants exist for fine-tuning clearance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101066 | TRANSMISSION HOUSING | Main structural casing that encloses the gearset and shim |
| 0636011118 | HEXAGON SCREW | Secures the housing halves together with precise torque |
| 4616301307 | HOUSING | Intermediate housing that supports the planetary carrier |
| 4616301309 | HOUSING | Rear housing section containing the output shaft bearing |
| 0636011038 | HEXAGON SCREW | Fastener for the valve body mounting bracket |
| 0636016015 | HEXAGON SCREW | Bolt for the oil pump cover retention |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing positioning |
| 0634313118 | O-RING | Seals the oil passage between housing sections |
| 0636304019 | SCREW PLUG | Closes the pressure test port on the housing |
| 0634801152 | SEALING RING | Prevents fluid leakage at the output shaft flange |
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