Overview
The ZF 4642.231.134 OIL DIPSTICK is a precision-engineered measurement tool designed exclusively for the WG150 series transmission. This OEM genuine part provides accurate fluid level readings, ensuring the hydraulic system maintains optimal pressure and lubrication. Mounted directly into the TRANSMISSION HOUSING, the dipstick allows operators to quickly verify oil condition without disassembly. The SKU 4642.231.134 is manufactured to ZF’s exacting tolerances, featuring a corrosion-resistant shaft and a clearly marked indicator zone for rapid visual inspection. Proper dipstick function is critical for preventing aeration and overheating in the WG150 gearbox.
Symptoms of Failure
- Oil leaks at the dipstick tube seal: A worn or cracked dipstick O-ring allows transmission fluid to escape, leaving puddles under the vehicle and causing low fluid levels that lead to gear slipping.
- Inaccurate fluid level readings: A bent or degraded dipstick shaft provides false oil level indications, causing overfilling or underfilling that results in erratic shifting and clutch chatter.
- Contaminated oil entry: A broken dipstick cap or missing seal allows dirt and moisture to enter the transmission housing, accelerating internal wear and reducing hydraulic pressure.
- Difficulty inserting or removing the dipstick: Warpage or corrosion on the dipstick shaft creates friction against the tube, making routine checks impossible and risking damage to the TRANSMISSION HOUSING bore.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4642.231.134 |
| Material | Stainless steel shaft with nitrile rubber O-ring |
| Overall Length | 385 mm (15.2 in) |
| Indicator Range | Min–Max etched marks at 10 mm intervals |
| Weight | 0.12 kg (0.26 lb) |
| OEM Reference | ZF 4642.231.134 |
| Thread Type | M14 x 1.5 |
Compatibility
This dipstick is primarily designed for the ZF WG150 series, but it also fits select models in the WG180 and WG200 families when used with the correct TYPE PLATE for identification. It is compatible with all WG150 variants including the WG150-1, WG150-2, and WG150-3. For installations requiring a secure mounting point, the GROOVED STUD is used to anchor the dipstick tube to the housing. Always verify your transmission serial number against the ZF parts catalog before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Encloses gear train and hydraulic components |
| 4642301205 | TRANSMISSION HOUSING | Alternate housing variant for WG150 |
| 0730365125 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Secures dipstick tube to housing |
| 4642301168 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4642301169 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 0636100621 | HEXAGON SCREW | Fastener for housing assembly |
| 4642301186 | SCREEN SHEET | Secondary filter screen |
| 4644106324 | SHIFT SYSTEM | Controls gear engagement |
| 4644306598 | PLATE | Cover plate for shift mechanism |
