A performance axle refers to a part in a vehicle that is designed to improve its speed, power, and overall performance. It is usually stronger and more durable than a regular axle to handle higher levels of stress and torque. Full definition
The car retains the original matching - numbers M21 Muncie 4 - speed transmission and anti-spin limited - slip rear end with 3.42:1 performance axle ratio. (barrett-jackson.com)
ECU calibration was performed by SCT Performance, and an MRT Performance axle - back exhaust kit was fitted. (fordauthority.com)
The engine modifications aside, there are literally four driveline upgrades — a Driveshaft Shop one - piece driveshaft, Stifflers driveshaft safety loop, CHE Performance axle brace, and an Eaton Truetrac differential. (mustangandfords.com)