Overview
The ZF 0501.002.473 SHIFT CYLINDER is a critical hydraulic actuation component engineered for the WG 200 series transmissions. This OEM genuine part (SKU: 0501.002.473) directs pressurized oil to engage clutch packs and select gear ranges within the transmission valve body. Positioned between the main control module and the clutch housing, this cylinder converts hydraulic signals into precise mechanical movement. When paired with a robust TRANSMISSION HOUSING, the shift cylinder ensures consistent pressure delivery for smooth ratio changes under heavy load conditions.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn shift cylinder often causes a noticeable lag when shifting from neutral to drive or reverse, followed by a jarring engagement.
- Intermittent gear slipping under load: If the cylinder cannot maintain hydraulic pressure, the transmission may momentarily lose power during uphill climbs or towing.
- External oil seepage around the shift tower: Degraded seals on the 0501.002.473 allow ATF to leak past the cylinder bore, leaving visible drips on the bell housing.
- Erratic shift patterns: A sticking piston inside the cylinder can cause the transmission to skip gears or hunt between ratios unexpectedly.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.002.473 |
| Material | Hard-anodized aluminum alloy |
| Bore Diameter | 38 mm |
| Overall Length | 145 mm |
| Weight | 0.42 kg |
| Seal Type | PTFE lip seal (integrated) |
| OEM Reference | ZF 0501.002.473 |
| Operating Pressure | 10–18 bar |
Compatibility
This shift cylinder is primarily designed for the ZF WG 200 series transmissions, including models WG180, WG200, and WG210. It also fits select variants of the ZF Ecomat 4HP and 5HP series where the shift cylinder mounting pattern matches the valve body interface. Always verify the TRANSMISSION HOUSING casting number before installation, as housing revisions may require a different cylinder stroke length. For identification, cross-reference the TYPE PLATE affixed to the transmission casing, and secure the assembly with a GROOVED STUD to prevent fastener loosening.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101222 | TRANSMISSION HOUSING | Encloses gear train and shift cylinder |
| 4644301226 | TRANSMISSION HOUSING | Alternate housing variant for WG200 |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Fastener for shift cylinder mounting |
| 4644301298 | COVER PLATE | Seals shift cylinder access port |
| 0634306525 | O-RING | Hydraulic seal between cylinder and housing |
| 0636305026 | SCREW PLUG | Closes pressure test port |
| 4475280078 | ADAPTER | Converts hydraulic line fitting |
| 4644301279 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4644301088 | SEALING CAP | Protects unused hydraulic ports |
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