Not familiar with the "4R" designation, but there are really only 2 'popular' speed sensors:
Both are well covered in the "Related Questions" below
yes the have a speed sensor a input and out put the input allow your transmission to change gears and the output speed sensor allow your speed to register on your speed domitor
Speed sensor on a 2001 ford expedition
If it is the rear sensor, it will be in the differential. If it is a front sensor, it will be located at each front wheel.
The crank position sensor on a 2001 Ford Windstar van is located on the bottom of the engine. It constantly monitors the engine's crankshaft and reports information to the computer.
where is the speed sensor for the transmission located in 2001 chevy venture
There isn't an input speed sensor.
where is the output shaft speed sensor located on a 2001 Kia Optima?
how do you change a thermostat sensor in a 2001 Chevy cavalier and where is it
Speed Sensor The sensor is located on the rear axle housing.
No speed sensor on the manual trans. The speedometer signal comes from the rear axle speed sensor.
how do you change ALC sensor on 2001 Grand AM
Remove the wheel Trace the speed sensor from behind the rotor to a connector disconnect the connector unscrew the bolt that's attaching the sensor to the rotor platform You might have to pry the sensor from the rotor platform geraldfulsom34@yahoo.com