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Vented Dipstick System

All models of dipsticks

The vented dipstick system (VDS) was developed for MFWD axle housings. Its design allows the housing to breathe bi-directionally, preventing over-pressurization and vacuum conditions caused by factory sealed units or one-way relief valves made by other manufacturers, including the OEM option. 


  • Provides protection from axle housing pressurization/vacuum, preventing potential hub seal failure, oil leaks, costly repairs and down time. 

  • Precision machined aluminum dipstick and fittings replace OEM components

  • Extruded dipstick boss allows for tool-less removal or accepts ¾” (19mm) wrench

  • Inverted vent offers maximum protection from water, dust and debris

  • Filter enclosed in dipstick head provides dust protection even if hose becomes damaged or removed

  • Beaded hose adapter allows for quick removal of vent hose for oil changes or level checks 

  • Durable and weather resistant thermoplastic rubber hose

  • No moving parts

  • Designed and made in USA

Dipstick on tractor
Complete VDS kit

What's in the kit?

Vented Dipstick


Custom Vent Cap




Zip Ties

Otis Sticker

Detailed Instructions

Why VDS?

Have you heard this sound when checking your front axle oil? If so, there is a pressure differential from ambient inside your front axle housing. This pressure is being exerted on all components of the axle housing, including all seals. Protect the seals from pressure-related leaking and failure by allowing the housing to vent freely with our VDS kit.

Don't be misled. The part shown here is termed a "breather". It is factory installed on various late model tractors and OEM replacement "vented" dipsticks. This is not a vent. It is a pressure relief valve (PRV) that allows air to only exhaust from the axle housing upon exceeding the pressure exerted on the valve disc by the spring. This will not allow bi-directional venting or equalization of the axle housing to ambient pressure. 

Pressure release valve
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Also distributed by: Bolt On Hooks
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