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Rubber Bumper

1. Rubber stop on the car frame that prevents metal-to-metal contact when the rear-axle housing moves to its maximum upward position. 2. Rubber stops positioned on or near a control arm to limit the maximum upward or downward travel of the arm.

Rubber Manufacturers Association (RMA)

A trade association for the manufacturers of rubber products for motor vehicles.

Rubberized Cork

A mixture of cork and rubber sometimes used as a gasket.

Rubbing Block

The insulated section of the movable breaker-point arm that contacts the breaker cam of a conventional ignition distributor.

Rules Of Motion

A term used for Newton's laws of motion.

Rumble Seat

A folding seat in the rear deck of some older two-door coupes, convertibles, and roadsters.

Rumper

A big, noisy, rough-idling, high-performance engine.

Run Whatcha' Brung

To run whatever one brings to a racing event, especially a drag-racing event.

Run-on

A term used for dieseling or running on.

Running Board

A flat step between the front and rear fenders to help passengers get in and out of the vehicle.

Running Gear

The undercarriage of a vehicle and all mechanical components attached to it.

Running On

The condition that exists when a spark-ignition engine continues to run after the ignition switch has been turned off.

Rust

A metal oxidation caused by moisture and oxygen.

Rust Converter

A liquid that can be painted over that is sprayed on pare metal to eliminate light rust and prevent other rust from forming.

Rust Inhibitor

A chemical added to the coolant in a radiator to reduce the build-up of rust.

RV

An abbreviation for recreational vehicle.

RV Airstreaming

Using an Airstream travel trailer as RV of preference. Towing an Airstream travel trailer.

RV Artic Package

An RV that has been equipped with extra insulation and heat pads for holding tanks for winter time use.

RV Axle Lock

A replacement right front axle built to freely wheel the front wheel when towing (on towed car).

RV Back-up Monitor

Video camera mounted on rear of motor home to assist the driver visually with backing up the motor home, via a monitor mounted in the driver's compartment or in a central area of the cab where it can be viewed by the driver from the driver's seat. These monitors are usually left in the 'on' position to also assist the driver with the flow of traffic behind the motor home and in watching a "towed" vehicle.