CV Joints

CV joints allow a drive shaft to transmit power through a variable angle, at constant rotational speed, without an appreciable increase in friction or play. They are mainly used in front wheel drive and all wheel drive cars. Rear wheel drive cars with independent rear suspension typically use CV joints at the ends of the rear axle halfshafts, and increasingly use them on the propshafts.

They are protected by a rubber boot, a CV gaiter. Cracks and splits in the boot will allow the joint to corrode and a new joint would need to be fitted if the joint is not removed early enough, cleaned, greased, and a new boot fitted.

Transmissions

A transmission provides speed and torque conversions from a rotating power source to another device using gear ratios