Overview
The ZF 4644.231.173 OIL DIPSTICK is a precision-engineered measurement tool designed exclusively for the WG200 series transmission. This OEM genuine part provides accurate fluid level readings, ensuring optimal lubrication and hydraulic pressure within the gearbox. Installed directly into the transmission housing, the dipstick allows operators to quickly verify oil condition and volume without disassembly. The SKU 4644.231.173 is manufactured to ZF’s exacting tolerances, featuring a clearly marked indicator rod that resists corrosion and thermal deformation. Proper fluid level maintenance using this component prevents premature wear on internal assemblies such as the 4644101164 TRANSMISSION HOUSING and the 4644301371 TRANSMISSION HOUSING, both of which rely on consistent oil coverage for heat dissipation.
Symptoms of Failure
- Oil seepage around the dipstick tube: A worn or cracked dipstick seal allows transmission fluid to escape, leaving visible puddles under the vehicle. This often leads to low fluid levels and erratic shifting.
- Inaccurate fluid readings: When the dipstick’s markings fade or the rod bends, operators receive false oil level data. This can cause overfilling or underfilling, both of which stress the 0730365067 TYPE PLATE identification system and internal clutches.
- Gear slipping or delayed engagement: A compromised dipstick that fails to seal properly allows air ingress into the transmission. This aerates the oil, reducing hydraulic pressure and causing gear slippage during acceleration.
- Burned oil smell from the vent: If the dipstick is missing or broken, debris enters the transmission, contaminating the fluid. This accelerates wear on components like the 0631311009 GROOVED STUD and leads to thermal breakdown of the oil.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4644.231.173 |
| Material | Chrome-plated steel rod with rubber seal |
| Overall Length | Approx. 380 mm |
| Rod Diameter | 6 mm |
| Weight | 0.12 kg |
| OEM Reference | ZF 4644.231.173 |
| Seal Type | Integrated O-ring (compatible with 0634306525) |
Compatibility
This dipstick is primarily engineered for the ZF WG200 series transmissions, including the WG180, WG200, and WG210 models. It is also compatible with certain WG150 variants that share the same oil pan depth and tube geometry. Always verify fitment by cross-referencing the 0730365067 TYPE PLATE affixed to your transmission housing. For installations requiring additional sealing, pair this dipstick with the 0634306525 O-RING to prevent leaks at the tube interface.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101164 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4644301371 | TRANSMISSION HOUSING | Alternative housing variant for WG200 |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Fastener for housing alignment |
| 4644303060 | COVER PLATE | Seals the transmission access port |
| 4644201011 | COVER PLATE | Secondary cover for oil pan |
| 4644201010 | COVER PLATE | Lower housing cover plate |
| 4644301372 | COVER PLATE | Differential cover variant |
| 0636610028 | STUD | Threaded rod for mounting |
| 0634306525 | O-RING | Seal for dipstick tube connection |
