I have a 99' Dodge ram 1500 4x4 5.9L with a 3.55 rear end gear ratio. Just swapped limited slip with a posi but the censor on the top doesn't match,what can I do?

Asked by Jan 18, 2015 at 02:16 AM about the 1999 Dodge Ram 1500 2 Dr ST 4WD Extended Cab SB

Question type: Maintenance & Repair

Had to switch the censor out from the new rear end to the old for the
censor to fit but after re-assybling my speedometer reads around
25 mph when I'm doing 55, if I let off the throttle it reads normal like
its backwards, how can I fix this?

1 Answer

4,965

you might have to use the sensor that came with the diff and switch out the connector ...the tone wheels may be different and have a different gap or less teeth ....//The ABS module receives the signal from the sensor and the calculates it into MPH and then sends it to the PCM...// the only other thing is did you get the correct gear ratio ...do you know what year the vehicle the diff came out of??

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