What is the freon capacity for a 1999 Dodge Ram 1500 5.9?
R134 is a refrigerant. Pretty much the same thing. If you have front and rear A/C it calls for 28oz. If its just front A/C, it calls for 30oz.
You have more than one ABS wheel speed sensor. Probably three sensors, one for each front wheel and one for the rear differential. If the ABS light is on, have your local auto parts store read the code(s). The code(s) will help direct you to which speed sensor is bad if in fact you have a bad speed sensor.