Overview
The ZF 4660.062.005 WG 92 TSC Powershift Transmission Assembly is a complete, drop-in replacement unit engineered for heavy-duty off-highway applications. This assembly integrates the torque converter, clutch packs, and final drive gearing into a single sealed housing, serving as the central power distribution node in the driveline. The SKU 4660.062.005 is specifically calibrated for the WG 92 series, ensuring precise shift timing and hydraulic pressure modulation. This unit replaces the entire rotating assembly, including the input shaft, output shaft, and planetary gear sets, making it a critical component for restoring full transmission function.
Symptoms of Failure
- Delayed or harsh engagement when shifting from neutral to forward or reverse: Worn clutch pack seals or degraded piston bores within the 4660.062.005 assembly cause sluggish hydraulic response, leading to operator complaints of “clunking” shifts.
- Intermittent loss of drive under load (gear slipping): As internal friction discs wear, the transmission fails to hold torque, resulting in RPM flare without corresponding vehicle movement, particularly on inclines.
- External oil leaks at the bell housing or output flange: Cracking or warpage of the main casing forces transmission fluid past the 0734309932: SHAFT SEAL, leaving puddles under the vehicle after shutdown.
- Unusual whining or grinding noises from the transmission center section: Bearing fatigue or gear tooth spalling inside the 4660.062.005 generates metallic debris, which accelerates wear on the 4950101004: HOUSING and adjacent components.
Technical Specifications
| Parameter | Value |
|---|---|
| Overall Length | 685 mm (27.0 in) |
| Dry Weight | 142 kg (313 lb) |
| Input Torque Capacity | 2,200 Nm (1,623 lb-ft) |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 4660.062.005 / WG 92 TSC |
| Seal Type | Viton dual-lip with dust exclusion |
| Bolt Torque (Main Case) | 120 Nm ± 10% (dry threads) |
Compatibility
This complete unit is designed for the ZF WG 92 series powershift transmissions, specifically the WG92, WG180, and WG200 variants used in telehandlers, wheel loaders, and rough-terrain forklifts. It is also compatible with select WG 120 and WG 150 models that share the same bell housing bolt pattern and input shaft spline count. Always verify the serial number of your existing transmission against the 4660.062.005 specification before ordering. The assembly interfaces directly with the 4950301018: HOUSING I and the 4660101023: TRANSMISSION HOUSING to form the complete driveline enclosure.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4950101004 | HOUSING | Encloses the torque converter and pump drive |
| 4950301018 | HOUSING I | Intermediate casing for clutch pack assembly |
| 0734309932 | SHAFT SEAL | Prevents fluid egress at the output shaft |
| 4660101023 | TRANSMISSION HOUSING | Main structural body of the gear train |
| 4660301058 | HOUSING | Rear cover for the PTO drive section |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0750100022 | SCREW PLUG | Seals hydraulic test ports and drain holes |
| 4660301009 | BRACKET | Mounting support for shift valve body |
| 4660221039 | TUBE | Hydraulic fluid transfer line between sections |
| 0636103274 | CAP SCREW | High-tensile fastener for housing retention |
