ABS Light problem
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Joined: May 2006
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ABS Light problem
I replaced my rear differential mounted speed sensor less then 50 miles ago (I thought it will fix my bouncing speedometer needle problem) and today the ABS light started flickering on and off and finally stayed on. The speedo gauge started bouncing wildly from 0 to 85 mph, that is worst then when I had to change the sensor -- then it used to start the dance after I accelerate past 45-50 mph.
Also, I think that the transmission started to hesitate when shifting gears -- I will have to build up RPMs and then "bam" it will whiplash into gear. When I hit a pothole the gauge bounce will increase from the vibration.
My van is a 1996 E250, 5.8 V8, 148k miles and I think that it has only rear ABS. I do not know if the rear differential is a traction-lok one, but when I changed the speed sensor (less than 50 miles ago) I also replaced the oil with 80W90 and added friction modifier. The guy at the parts place said that it won't hurt to add the modifier if I am unsure about the differential type.
Thanks,
Simon
Also, I think that the transmission started to hesitate when shifting gears -- I will have to build up RPMs and then "bam" it will whiplash into gear. When I hit a pothole the gauge bounce will increase from the vibration.
My van is a 1996 E250, 5.8 V8, 148k miles and I think that it has only rear ABS. I do not know if the rear differential is a traction-lok one, but when I changed the speed sensor (less than 50 miles ago) I also replaced the oil with 80W90 and added friction modifier. The guy at the parts place said that it won't hurt to add the modifier if I am unsure about the differential type.
Thanks,
Simon
Lead Driver
Joined: Feb 2003
Posts: 8,140
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From: Oak Harbor, OH
First step is to pull the speed sensor back out and see if there are any metal shavings on it, if so you need to pull the back off the diff and take a look to see what's goin on. It's possible the tone ring has gone bad, or the sensor may have come loose. Make sure the wire harness is good and securely plugged in as well.
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Thanks Pfogle, I just pulled the sensor and there are 2-3 microscopic metal particles stuck on the magnetic part. I would have assumed that this si normal given the mileage on the van. When I changed the differential oil 50 miles ago I could not see any missing teeth or solid metal particles floating in there. Is there other way to diagnose the tone ring? The wire harness is securely affixed with a pigtail to the sensor.
Anything else that could be the problem?
Regards,
Simon
Anything else that could be the problem?
Regards,
Simon
Lead Driver
Joined: Feb 2003
Posts: 8,140
Likes: 4
From: Oak Harbor, OH
Check you're connection. I forget how many wires there are on it. It should have a 5v+ and a signal return at least. It may have a ground. If it has three there should be a voltage between the two outer wires as the center one is usually the return. A good shop manual will help you determine which wire is which. Haynes and Chilton are OK, but a factory ford manual (www.helm.com) will be the best.
