An aluminum driveshaft connected it to 4.10&colon;1 rear limited slip gears. The suspension upgrade includes new struts/steering knuckles, torsion bars, shocks and mounts and driveshaft. Some cars have a freewheel that disengages the driveshaft from the driven shaft. Power is transferred by an enclosed splined driveshaft with one universal joint. A simple retarder uses vanes attached to a transmission driveshaft between the clutch and roadwheels. This happens when the driven shaft rotates faster than the driveshaft. The end of the driveshaft is splined and fits into the outer "joint". Connection to the third member rear-end was via an enclosed "torque tube" driveshaft. Jeep dealers will replace the rear driveshaft on affected 2020 Gladiator models. They can also be driven separately via gears off a driveshaft. That could be achieved with front-wheel drive obviating the need for a central driveshaft. At the "outboard" end of the driveshaft a slightly different unit is used. The same year, a 4.5-inch aluminum driveshaft replaced a 3.5-inch steel unit. Either engine can power both proprotors through the wing driveshaft. Also, it uses universal joints at "both" ends of the driveshaft, which is not enclosed.