I just found this while browsing around over on FSB and want to save it for future reference:
Well, since I have a pre-1992 Bronco, my VSS is run off of a mechanical speedometer/odometer cable attached to the transfer case tailhousing. The Speed Sensor located in my rear differential is soley for 2-wheel RABS.
1992 and later Broncos changed to use the rear differential Speed Sensor as a combination 4-wheel ABS and VSS Sensor as they upgraded to an electronic speedometer/odometer. This would be an issue that could be overcome with an after market transfer case yoke mounted Speed Sensor, such as the new Brea Auto Electric unit as referenced in my previous post.
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I have not yet decided whether to eliminate my RABS as of yet.
Here are pics of the Currie 9" Race Ready Rear End installed in a Full Size Bronco which I have been refering to:
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