Hummer transmissions are engineered to handle massive curb weights and the high-torque demands of serious off-road recovery and exploration. From the industrial-grade 4L80-E and 6L80 units in the H2 to the specialized manual and automatic options in the H3, these drivetrains are built with heavy-duty internal components designed for thermal stability and high-payload durability.
By choosing a thoroughly inspected, OEM used Hummer transmission from our inventory, you are ensuring your vehicle maintains its factory-intended low-range crawl capability and towing power. Every unit is load-tested and fluid-verified, providing a rugged and cost-effective alternative to expensive dealership replacements for these American icons.
We stock transmissions for every legendary Hummer ever built.
We stock heavy-duty 4-speed automatic transmissions tested for peak military-grade reliability and torque.
Restore your full-size SUV shifting with tested 4L65-E and 6L80 powerplants verified for maximum towing capacity.
Find the perfect replacement 4L60-E automatic or 5-speed manual to get your versatile mid-size explorer back on the trail.
Find high-output replacement transmissions verified for high-torque V8 engines and aggressive gear engagement.
"Don't let a failing gearbox ground your machine. Our Hummer transmissions represent the pinnacle of heavy-duty American engineering, ready to deliver that signature unshakeable performance for miles to come."
Bench-tested for smooth low-range engagement and high-pressure clutch health.
100% genuine Hummer/GM components with verified 4WD transfer case compatibility.
"The Hummer H2 utilizes the Heavy-Duty 4L80-E series, which is derived from military architectures to handle extreme gross vehicle weight ratings while providing reliable hydraulic control."
Our expert team is standing by to verify transmission compatibility and secure a tested Hummer unit for you today.