Idler arm: Component of the steering linkage which is geometric duplicate of the steering gear i.e. Pitman arm. It supports the left side (i.e. on…

Hydramatic: First mass-produced fully automatic transmission without any torque converter, used in 1940 oldsmobiles.

Hub: The portion of the axle shaft over which the wheel and tyre are actually mounted.

Hot hatch or Sport compacts: It is a high-performance small car, usually a hatchback, based on standard superminis or small family cars, with improved straight-line…

Hotchkiss drive: The simplest and the most commonly used type of rear axle drive. In this, the suspension springs take the body weight, driving thrust,…

Hooke's Joint: The universal joint invented by Robert Hooks, where the yoke of one shaft is connected to the yoke of the second shaft at…

Hood: Part of the vehicle body which covers the engine compartment in front engine vehicles.

High beam: Also called main beam, which comes from the main filament of the head light and is of the higher intensity, to be used…

Helper spring: These are provided on many commercial vehicles in addition to the main springs. They serve to increase the range of loading, keeping the…

Head restraint: It is meant to protect the occupants of front seats from whiplash injury of the neck in case of a rear impact. It…

Hazard Flasher: Blinking lights meant to indicate hazard e.g. the vehicle stopped in or alongside moving traffic, a slow moving vehicle in high-speed lane.

Hatchback: A car with a rear tailgate. Not a saloon or an estate, but something in between, e.g., Maruti 800.

Handling: Relative ability of a vehicle to negotiate curves and respond to road conditions.

Half-shaft: A shaft transmitting the drive from the final drive unit to the road wheels.

Ground clearance: The gap between the lowest point of a vehicle body and the ground.