Rugged Venting for Transmissions, Axles & E-Drivetrains
Protect Powertrain Seals from Pressure Differentials — In Oil, Heat, and Water Wading
Gore powertrain vents rapidly equalize pressure in transmissions, differentials, axles, and e-drivetrains — preventing seal failures from thermal cycling, oil aerosols, and water wading events that cause expensive field failures.
Powertrain housings face some of the most demanding venting requirements in the vehicle: continuous exposure to hot gear oil and aerosols, extreme temperature cycling between cold-start and operating temperature, and periodic water wading events that create rapid external pressure loads on seals. Without an effective vent, these pressure differentials cause premature seal failure and allow fluid or water ingress — leading to costly transmission and axle damage. Gore's Direct-Fit (AVS 2148 / VE2148) and Tube-Mount (AVS 41 / VE2048) powertrain vents address each of these failure modes. The integrated pre-filter protects the Gore ePTFE membrane from internal oil aerosols that would plug an unprotected vent. The breathable membrane continuously equalizes pressure, reducing seal stress across all operating conditions. Tube-mount variants distance the vent from heat sources and oil mist by routing through a flexible tube to a cooler, cleaner location — enabling easy replacement without disturbing the main housing.
Why Choose Gore Automotive Powertrain Vents?
Oil-Resistant Membrane with Integrated Pre-Filter
Standard ePTFE vents can be plugged by oil aerosols generated inside transmission and gearbox housings. Gore's powertrain vents incorporate an integrated pre-filter that captures oil mist before it reaches the ePTFE membrane, maintaining full airflow capacity over the service life of the unit and protecting the membrane's breathability.
Eliminates Water Wading Test Failures
When a vehicle descends rapidly into water during wading, the sudden pressure differential across powertrain seals is one of the primary causes of field seal failures. Gore powertrain vents equalize this pressure spike fast enough to prevent over-stressing the seal, enabling compliance with OEM wading test standards without seal design changes.
Up to +150°C Continuous Operation
The High Temperature snap-fit variant is rated for continuous operation at +150°C and is resistant to mineral oil — making it suitable for automatic transmission housings, differentials, and e-drivetrain gearboxes that operate at sustained high temperatures during towing or high-load driving cycles.
Direct-Fit and Tube-Mount Configurations
The Direct-Fit variant (AVS 2148) integrates compactly into space-constrained housings. The Tube-Mount variant (AVS 41) uses a flexible tube to route the vent to a more favorable location — physically separating it from internal heat and oil mist, and enabling replacement without opening the main housing. Both are snap-fit for straightforward assembly integration.
Reduces Overall System Cost
By extending seal service life and eliminating vent-related wading failures, Gore powertrain vents reduce warranty costs and field service events. The compact, lightweight design also eliminates the need for machined vent plugs or labyrinth seal solutions that add mass and manufacturing cost to the powertrain housing.
Compatible with ICE, Hybrid, and EV Drivetrains
Gore powertrain vents are specified for conventional gearboxes, transmissions, and differentials as well as for e-drivetrains and e-motors in BEV and PHEV applications. The same membrane technology that handles hot gear oil in an ICE transmission is equally effective in the sealed gearbox of a high-torque electric axle.
Technical Specifications
- Direct-Fit Sample / Production
- AVS 2148 / VE2148
- Tube-Mount Sample / Production
- AVS 41 / VE2048
- Mounting Style
- Snap-fit (both variants)
- Standard Max Temperature
- +125°C continuous
- High Temperature Variant
- +150°C continuous, mineral oil resistant
- Oil Aerosol Protection
- Integrated pre-filter
- Application Standards
- OEM wading test compliant
- Drivetrain Compatibility
- ICE, hybrid, BEV e-drivetrains
- Regulatory Compliance
- EU REACH (PFOA-free)
Applications
- Automatic and manual transmission housings in passenger and commercial vehicles
- Front and rear differential housings
- Transfer case assemblies in 4WD and AWD systems
- E-drivetrain gearboxes and e-axle housings in BEV and PHEV
- Electric motor housings exposed to internal oil mist
- Industrial and off-highway vehicle gearboxes
Industries Served
Part Numbers
Reference these part numbers when requesting a quote. Contact RSTECH Electronics for pricing, availability, and samples in Israel.
Part numbers sourced from gore.com. Custom configurations and additional variants may be available — contact RSTECH for details.
Frequently Asked Questions
Why does a powertrain housing need a vent at all?
As a transmission or differential heats up during operation, the air and vapor inside expand and must have somewhere to go — otherwise pressure builds until it escapes past seals. When the housing cools, negative pressure can draw external air or water back in the same way. A Gore vent provides a controlled path for this pressure exchange while blocking contaminant ingress through the vent.
What is the tube-mount vent and when should I specify it?
The tube-mount variant (AVS 41) attaches to the housing via a flexible tube rather than directly to the housing port. This allows the vent itself to be positioned away from the hottest parts of the powertrain and away from the highest concentration of oil aerosols inside the housing. It is also field-replaceable without opening the gearbox. Specify the tube-mount version when direct-mounting location is thermally or contamination-adverse, or when serviceability is a requirement.
Can the Gore powertrain vent handle full water immersion during wading?
Gore powertrain vents are designed to comply with OEM wading test standards, which involve specific immersion depths and durations. The vent rapidly equalizes the external pressure surge from immersion, reducing the pressure load on housing seals to within their design tolerance. Contact RSTECH Electronics for specific wading depth and duration parameters for the variant you are considering.
Is the integrated pre-filter a separate serviceable component?
No — the pre-filter is integrated into the vent assembly and is not a separately serviceable element. The entire vent assembly (pre-filter + membrane + housing) is replaced as a unit. In applications where oil aerosol loading is very high, the tube-mount variant is often preferred because it can be replaced in the field without disturbing the main housing.
Ready to source Automotive Powertrain Vents in Israel?
Contact RSTECH Electronics — your authorized Gore representative in Israel.