The phrase "transmission hump" refers to the elevated area in the floorboard of a vehicle where the transmission is located. It's called a hump because it creates a raised section, or bump, in the center of the floor.
Sentences with «transmission hump»
However, space for the rear passengers is quite limited and there is a huge transmission hump in the middle, which means the rear seats are best suited for two adults. (rediff.com)
Knee room and headroom are average at the rear and three adults sitting abreast isn't a good idea because of the big transmission hump in the middle. (rediff.com)
Like before, the rear bench can seat three but the massive transmission hump makes it comfortable for two adults. (motorbeam.com)