The '87-up
ABS sensor (DY1123, F85Z-9E731-AB) bolt is like the rear cover bolts: 13mm hex head @ 25-30 lb-ft. The sensor's resistance should be 800-1400 Ohms across the pins, and more than 10K Ohms from the metal shell to either pin. If any VSS problem is suspected, pull the ABS out & look for damage, indicating a serious problem in the diff. For info about how the ABS sensor is used, read these captions & the others in the albums:
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Early axles use a yoke with U-bolts that wrap around the rear U-joint caps. Later axles use this companion flange (
221369) sized for
51330X U-joint with 12-point 12mm bolt heads torqued to 80 lb-ft.
See also:
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![flange.jpg The '87-up [url=https://www.amazon.com/dp/B001H1MQFI]ABS sensor (DY1123, F85Z-9E731-AB)[/url] bolt is like the rear cover bolts: 13mm hex head @ 25-30 lb-ft. The sensor's resistance should be 800-1400 Ohms across the pins, and more than 10K Ohms from the metal shell to either pin. If any VSS problem is suspected, pull the ABS out & look for damage, indicating a serious problem in the diff. For info about how the ABS sensor is used, read these captions & the others in the albums:
[url=https://www.supermotors.net/registry/media/1172020][img]https://www.supermotors.net/getfile/1172020/thumbnail/rabssensor.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/1164812][img]https://www.supermotors.net/getfile/1164812/thumbnail/4wabscomponents.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/280872][img]https://www.supermotors.net/getfile/280872/thumbnail/rabs-components-92.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/322459][img]https://www.supermotors.net/getfile/322459/thumbnail/cruisee.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/76023][img]https://www.supermotors.net/getfile/76023/thumbnail/cluster-front.jpg[/img][/url]
Early axles use a yoke with U-bolts that wrap around the rear U-joint caps. Later axles use this companion flange ([url=https://www.amazon.com/dp/B08LTGLWK6]221369[/url]) sized for [url=https://www.amazon.com/dp/B00DOI9GFK]51330X U-joint[/url] with 12-point 12mm bolt heads torqued to 80 lb-ft.
See also:
[url=https://www.supermotors.net/registry/media/284976][img]https://www.supermotors.net/getfile/284976/thumbnail/dshaftsujoints.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/816251][img]https://www.supermotors.net/getfile/816251/thumbnail/drivelineanglesguide.jpg[/img][/url]](https://www.supermotors.net/getfile/74193/fullsize/flange.jpg)