ZF 4657.183.261 LOOSE PARTS for WG190 | OEM Genuine Part

Overview

The ZF 4657.183.261 LOOSE PARTS kit is a critical service component designed specifically for the WG 190 series transmission. This genuine OEM assembly contains the necessary fasteners, seals, and positioning elements required to secure and align the main transmission housing sections during rebuild or repair. The SKU 4657.183.261 is engineered to interface directly with the TRANSMISSION HOUSING, ensuring that the HOUS.FRONT SECT and HOUSING REAR PART maintain precise structural integrity under load. Without this loose parts set, the HOUSING REAR SECTION cannot be properly torqued to factory specifications, leading to premature wear.

Symptoms of Failure

• Transmission oil seepage at housing joints: When the 4657.183.261 loose parts degrade, the clamping force between housing sections weakens, causing ATF to weep from mating surfaces—a common symptom searched as “ZF WG190 oil leak between housing halves.”
• Audible gear rattle or clunking during shifting: Worn or missing fasteners from this kit allow micro-movement between the front and rear housing sections, resulting in misaligned gear shafts and a distinct metallic noise under load.
• Intermittent loss of hydraulic pressure: A compromised housing seal due to failed loose parts can cause internal pressure drops, leading to delayed engagement or slipping in forward gears—often queried as “WG190 transmission slipping after rebuild.”
• Vibration at highway speeds: Loose housing sections create harmonic resonance that transmits through the driveline, a symptom frequently reported as “ZF transmission vibration 50-60 mph.”

Technical Specifications

Compatibility

This genuine ZF loose parts kit is primarily designed for the WG 190 transmission series. Based on its structural role, it is also compatible with the WG 180 and WG 200 series transmissions that share the same housing architecture. The 4657.183.261 kit is not suitable for the older WG 150 or WG 160 series due to different bolt patterns and housing geometries. Always verify your transmission model number before ordering.

Related Components

Frequently Asked Questions

Q: Can I reuse the original bolts from my old housing instead of buying the 4657.183.261 kit?
A: ZF strongly discourages reusing fasteners from the original assembly. The bolts in this loose parts kit are single-use torque-to-yield fasteners that stretch during installation. Reusing old bolts can lead to insufficient clamping force and eventual oil leaks.

Q: Does this kit include the seals for the housing-to-pump interface?
A: Yes. The 4657.183.261 LOOSE PARTS set contains all necessary O-rings and gaskets for the main housing joints, including the seal between the housing and the pump adapter. However, it does not include the pump gasket itself, which must be ordered separately.

Q: How do I confirm this part fits my WG190 transmission?
A: Check the serial number plate on your transmission. The WG190 series will have “WG190” stamped on the main housing. Additionally, measure the bolt hole pattern on the rear housing section—this kit fits only the 12-bolt pattern configuration used from 2012 onward.