Quote:
Originally Posted by 80stech
The Bentley shows (suggests) the speedometer gets it's signal from the left rear wheel but it goes through the ABS module first, so if the ABS is working properly you would think that all the sensor info up to the ABS module was good so something is happening to the signal coming out of the ABS module or to/at the speedo. It could also be that there is a sensor issue and the ABS module is less sensitive to it than the speedo so you can't totally rule that out either.
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I was thinking bad transmission sensors, are you 100% sure the speedometer reads the speed from rear left ABS speed sensor? I recently replaced the right front one since it was shown as a DTC. One thing I guess I should have mentioned it is that since the double speed is happening I have the ABS also disabled (fuse out) since as soon as you try to move forward/backwards everything starts to blink like you just made a launch with 2k hp or something, not driveable in other words... So maybe the back sensor... works but not really?