Overview
The ZF 4661.106.032 CONTROL UNIT is a critical electro-hydraulic valve body assembly designed specifically for the WG 94 series powershift transmissions. This OEM genuine part governs clutch engagement, shift timing, and modulation pressure within the transmission control system. Positioned on the upper valve body housing, the 4661.106.032 unit receives electronic signals from the transmission ECU and converts them into precise hydraulic actions. The SKU 4661.106.032 is a direct factory replacement, ensuring factory-specified shift quality and preventing premature wear on downstream components such as the 4661103010: OUTPUT assembly.
Symptoms of Failure
- Erratic or delayed gear engagement: A failing control unit often causes hesitation when shifting from neutral to drive or reverse, particularly under load. This is a common search query for “ZF WG94 shifting delay.”
- Harsh or jarring shifts: When the control unit loses modulation capability, shifts become abrupt, leading to driveline shock. This symptom is frequently searched as “transmission clunking on shift.”
- Transmission slipping under load: Worn solenoids or valve spools inside the 4661.106.032 can cause clutch pack slip, especially during uphill hauling. Users often search “WG200 transmission slipping.”
- Oil contamination in the harness connector: Internal seal degradation allows transmission fluid to migrate into the electrical connector, causing intermittent fault codes. This is a known issue for “ZF control unit oil in plug.”
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4661.106.032 |
| Material | Die-cast aluminum housing with steel valve spools |
| Weight | 3.2 kg (7.05 lbs) |
| Dimensions (L x W x H) | 280 mm x 180 mm x 95 mm |
| OEM Reference | ZF 4661.106.032 |
| Operating Pressure | 12–18 bar (174–261 psi) |
| Seal Type | Nitrile rubber (NBR) O-rings |
Compatibility
This control unit is engineered for the ZF WG 94 series, which includes the WG180, WG200, and WG210 transmission models commonly found in heavy-duty trucks, cranes, and off-highway equipment. The 4661.106.032 is also compatible with select WG 92 series variants that share the same valve body footprint. Always verify the transmission serial number before installation. When rebuilding the valve body, consider replacing the 4661303004: OUTPUT SHAFT and inspecting the 4661201204: TAPER ROLLER BEARING for wear. The 4661201206: TAPERED ROLLER BEARING should also be checked for pitting during any major overhaul.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661103010 | OUTPUT | Transfers torque from planetary set to driveline |
| 4661303004 | OUTPUT SHAFT | Rotates within bearings to deliver power |
| 4661201204 | TAPER ROLLER BEARING | Supports radial and axial shaft loads |
| 4661201206 | TAPERED ROLLER BEARING | Handles high thrust loads in planetary gearset |
| 4661372031 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4661103800 | OUTPUT | Alternative output assembly for specific ratios |
| 4642303059 | INPUT FLANGE | Connects transmission to engine flywheel |
| 0750111307 | SHAFT SEAL | Prevents fluid leakage at rotating shafts |
| 0634306328 | O-RING | Seals hydraulic passages between valve body sections |
| 4660303022 | WASHER | Distributes load under bolt heads |
ZF 4661.106.032 CONTROL UNIT – Control Unit RFQ Support
ZF 4661.106.032 CONTROL UNIT is treated as a control-system part-number lookup item. Send visible markings, machine details, and documentation needs for RFQ review.
Part-Number Summary
Use ZF number 4661.106.032 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: WG 94
- Illustration section: CONTROL UNIT
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 4661.106.032 |
|---|---|
| Normalized SKU | 4661106032 |
| Part name | CONTROL UNIT |
| Product category | control unit |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
Image and Documentation Notes
Current product media status: fallback. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
Related Parts
- ZF 4660.106.031 CONTROL UNIT
- ZF 4661.106.013 CONTROL UNIT
- ZF 4660.106.024 CONTROL UNIT
- ZF 4661.106.014 CONTROL UNIT
- ZF 4660.106.013 CONTROL UNIT
