Rear Gear Swap, now ABS light? - Ford Powerstroke Diesel Forum
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Old 06-13-2013, 05:31 AM
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Rear Gear Swap, now ABS light?

Just changed my rear diff gears out after driving home and hearing a terrible hammering, only to pull the cover and find 3 teeth ripped off the ring. Went ahead and spent the extra $$$ and put Yukon ring and pinion in (4.10) and replaced the carrier and planetaries with a Detroit Locker. Installed everything, no noises or excessive heat, but the ABS light came on during the test drive. Not sure if the ABS sensor on the rear diff crapped out when the ring and pinion ate themselves or...? What/where is the pick-up for the sensor on the ring/carrier? Any ideas?

Thanks,

John
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Old 06-13-2013, 01:10 PM
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The sensor reads the teeth on a tone ring that is mounted to the ring gear. There is a good chance that some of the teeth were mutilated from the chunks of ring gear floating around. Pull the cover and spin the carrier around, you will see the tone ring. Clean the oil off of it and look really closely for any teeth that are bent, missing or otherwise not exactly like the others.

Here's a pic of a 96 I worked on a few years ago, almost identical to the 10.5 in your SD. A chunk came out of both the ring and pinion, was drug up the cover and damaged the teeth on the tone ring. The tone ring is the small teeth on the back of the ring gear.
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Old 06-13-2013, 03:00 PM
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Well ****... Turns out I didn't put the tone ring on the new ring . Since I didn't disassemble the old ring and carrier and just used a new ring on the Detroit locker, I didn't notice I was missing something. Guess I'll be dealing with the ABS light and putting on the tone ring when I change the fluid after break-in. Thanks JS!
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Old 06-13-2013, 04:54 PM
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Well, that would cause it too. If you have a auto, you should avoid driving it till it's fixed. The VSS is crucial to the shifting strategy.
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