derekwilliams345
New member
I can assure that the rear ABS has nothing to do with speedometer. I have my ABS cutout from the rear axle. And my speedo working properly.
I have a feeling that the speedo is linked with the front. I remember my wheel bearing being dirty, and the abs ring having rust. I cleaned up it. And sealed the hub back up with silicone over the seal. And it's better now. Because my speedometer used to go out randomly and I'd have to shut the car of to reset it.
I think the speedo is linked to all four ABS sensors at all four wheels. It works best when there are four but can measure speed using any one of them. I think when it sees discrepancies between the sensors it has to double check somehow and when it only has two sensors it kinda freaks out and shuts down. Theoretically if i go to a one wheel burnout right now i think it will cause my speedo to stop working so I'm gonna test the theory today
There are also Vehicle Speed Sensors normally located in the tranny or T/C. From some pics i saw they can be either mechanical gear driven or electronic very similar to the wheel speed sensors only located on the driveline somewhere in the cases