ring gear problem
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Joined: Jan 2005
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ring gear problem
I have a question, my 96 Bronco was having problems shifting gears and the odometer is on the fritz. I took it to a mechanic he originally thought it was the vehicle speed sensor but, then determined it was the ring gear on the rear axle. Does this sound right? He said he has to take the rear axle apart to replace it. What all is entailed in this job and how much does it usually cost to fix it? Thanks
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Joined: Sep 2002
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From: Gateway to the West
Its probaly not the actual ring gear but rather the "trigger" (excitor) ring that the Vehicle Speed Sensor uses to measure axle RPM's. Its not often that this ring developes a problem unless something has really gone wrong in the rear axle housing and even then, it usually just requires a good cleaning. The excitor ring has a series of grooves in it that the sensor "sees" as they roll past the end of the sensor. The sensor basically "counts" the grooves to determine axle RPMs. Like I said, its not a part that usually developes a problem. I'd at least get a second opinion unless you trust the mechanic.
If this is indeed the problem, I'm not certain of the cost but I do know it requires removing the differential which is not all that difficult but putting it back in, requires careful attention to how the ring gear and the pinion gear mesh with each other. If you are planning on changing gears for future larger tires or any other components in the axle are "marginal" you might want to have it all done at once since the axle will be that far apart.
If this is indeed the problem, I'm not certain of the cost but I do know it requires removing the differential which is not all that difficult but putting it back in, requires careful attention to how the ring gear and the pinion gear mesh with each other. If you are planning on changing gears for future larger tires or any other components in the axle are "marginal" you might want to have it all done at once since the axle will be that far apart.
Last edited by greystreak92; Mar 15, 2005 at 06:52 PM.
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