Officially the Hummer debuted on the American SUV market in 1992 after General Motors (GM) partnered with AM General – a heavy military vehicle manufacturer based in South Bend, Indiana – to produce a smaller, civilian version of the U.S. Army’s bulky High Mobility Multipurpose Wheeled Vehicle (HMMWV). During the first Gulf war, U.S. soldiers deployed to the Middle East nicknamed their hefty all-terrain transportation “Humvees”, so as a result, GM altered the domestic Humvee’s name to “Hummer”. Since 1992, Hummers have been sold to American consumers as the H1, H2, and H3 makes and models. Strict environmental standards imposed by the Environmental Protection Agency (EPA) in 1996 led to GM adapting the Hummer’s specifications to comply with the federal government’s updated regulations.
H1 Transmissions (1992-2006)
GM released the Hummer H1 with three different transmissions. The first H1 transmissions were 3-speed automatic GM Turbo-hydramatic THM400/3L80s, which were still deployed in the U.S. Army’s “Humvee” until their retirement. The next H1 transmission option available was the 4-speed longitudinal automatic 4L80; however, only the 6.6L V8 turbo diesel engine included a 5-speed automatic Allison 1000 transmission.
H2 Transmissions (2002-2009)
H2 Hummers were built with 4-speed longitudinal automatic 4L60E transmissions, which are electronically shifting versions of GM’s Turbo 700R series. Electronically shifting transmissions were an innovation in auto technology at the time since previous transmissions shifted gears mechanically, but with the electric shifter transmissions, slippage became a thing of the past in most cases since switching is controlled via a the Hummer’s computer processor. Another transmission deployed in the H2 Hummer fleet was the larger 6-speed 6L80E unit released to handle the upgraded V8 engines included inside these particular H2 makes and models. Both of the 4L60Es and 6L80Es were produced with 2-wheel and 4-wheel configurations depending once again on the particular options specified.
H3 Transmissions (2006-2010)
Recently, GM announced its intention to retire the Hummer fleet altogether in favor of newer hybrid models, which makes the H3 Hummer makes the last of their kind. Since 2006, H3 Hummers were produced with either a manual 5-speed 4L60E transmission, same as the H2 Hummer options. Other transmissions deployed were of the 4-speed automatic variety, yet it is worth noting that these final Hummer makes and models were released with a manual transmission option, but a number of consumers still appeared to prefer the automatic transmissions.
Hummer transmissions available
Hummer H1 V8 5.7 Liter, Hummer H1 V8 6.2 Liter Diesel, Hummer H1 V8 6.5 Liter Diesel, Hummer H1 V8 6.5L Turbo Diesel, Hummer H2 V8 6.0 Liter, Hummer used transmissions are here at your fingertips. Both used Hummer transmission or a rebuilt Hummer transmission or houstonenginerebuild has numerous locations for Hummer