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Ok. I got the rear swapped out. Have 2 problems. Wheels (14" steelies) wont fit, the axle hub? Is too big, so i used spacers. Problem #2. I have a horrible brake vibration. I checked everything out twice & don't see anything wrong. I am ase certified in brakes & suspension, so i kkow the usual problems. It feels like the drums are warped, but i have a hard time believing they could be warped this bad. My question is: could the abs be causing this? There is no vibration or noise during driving, until you hit the brakes, then holy shit its bad. If it is the abs causing this, can i unplug the sensor & make it stop? I know the abs won't work if i unplug it, but its hard to drive as is.ABS doesn't use "speed" it just watches "pulses per second", if there is a sudden drop, i.e. wheel stops turning, it activates and lowers pressure going to the brakes of that wheel
Speedo/odo uses Pulses per Mile(PPM)
If there is 102 teeth on a tone ring then there would be 102 pulses per axle rotation, then using a tire's Revolutions Per Mile(RPM) you can calculate PPM
This is what 1998 and up Rangers did, via GEM module or Computer, each used "known" 1 revolution pulse count + "known" tire PPM to get the calculated speed/distance to display on speedometer/odometer
If you change either of the "known" data then you have to change it in the calculator as well, or compensate for it
1997 and earlier still used the gear drive type setup so you could just change the driven gear's tooth count to compensate for changes in ratios or tire diameter