ZF 1232.304.049 SHIM for WG150 | OEM Genuine Part

Overview

This genuine OEM ZF 1232.304.049 SHIM is a precision-engineered component designed specifically for the WG 150 series transmission. It functions as a critical spacer within the differential assembly, ensuring precise axial clearance and load distribution between rotating elements. By maintaining exact tolerances, this shim prevents metal-on-metal contact and extends the service life of the entire drivetrain. The SKU 1232.304.049 is manufactured to ZF’s original specifications, guaranteeing a perfect fit and reliable performance in heavy-duty industrial applications.

Symptoms of Failure

• Excessive differential backlash or gear clunking – When the 1232.304.049 shim wears or compresses beyond specification, you may notice a distinct “clunk” when shifting between forward and reverse, indicating improper gear mesh within the WG150 differential.
• Premature bearing noise or whining – A worn shim allows the 0750117075: TAPER ROLLER BEARING to lose its preload, resulting in a high-pitched whine or growl during operation, especially under load.
• Oil contamination from metal particles – As the shim degrades, microscopic metal fragments can enter the transmission fluid, often visible during routine oil changes as a metallic sheen or sludge.
• Uneven tire wear or driveline vibration – In vehicles with differential lock functionality, a failing shim can cause intermittent power delivery, leading to noticeable vibration at highway speeds.

Technical Specifications

Compatibility

While primarily designed for the WG 150 Series, the 1232.304.049 shim is also used in select ZF WG180 and WG200 transmissions that share the same differential housing architecture. It is a direct replacement for the shim located between the 5838109012: DIFFERENTIAL and the 5838300626: DIFFERENTIAL HOUSING. Always verify your transmission model and serial number before ordering. This shim is not compatible with the WG210 or WG250 series without additional spacer modifications.

Related Components

Frequently Asked Questions

Q: Can I reuse the 1232.304.049 shim after a differential rebuild?
A: No. ZF recommends always replacing this shim with a new OEM part during any differential service. The shim compresses and work-hardens over time, and reusing it can lead to incorrect preload and premature bearing failure.

Q: How do I know if this shim is the correct thickness for my WG150?
A: The 0.49 mm thickness is the standard service shim. However, ZF offers shims in 0.05 mm increments. You must measure the differential housing clearance using a depth micrometer and select the shim that achieves the specified 0.05–0.15 mm end-play for the 2093209023: DIFFERENTIAL assembly.

Q: What tools are required to install this shim?
A: Installation requires a bearing puller, a torque wrench, and a dial indicator to verify preload. The shim sits between the differential housing and the taper roller bearing race. Always consult the ZF WG150 service manual for exact procedures.