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Rebuilt all the front end ball joints, now the TC engaging in corners

Old Apr 29, 2024 | 07:12 PM
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Default Rebuilt all the front end ball joints, now the TC engaging in corners

I had my front end all apart to replace the 4 steering knuckle ball joints and install brakes and now my TC comes on in corners. I guess it may be a hub sensor but they seem pretty bullet proof and I'm pretty sure I didn't damage one. any tests I can do to figure this out?
 
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Old Apr 29, 2024 | 09:17 PM
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Is the Centre Diff locked?
 
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Old Apr 29, 2024 | 11:18 PM
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Maybe the anti-lock braking is activating, rather than the TC?
 
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Old Apr 30, 2024 | 07:12 AM
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It brakes a wheel and the TC light comes on. No I never messed with the diff
 
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Old Apr 30, 2024 | 08:39 AM
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Years of troubleshooting in IT teaches me to look at what was changed or touched.

Ball joints aren't implicated by TC. But speed sensors would have been touched as a part of the process. As you mention, they are robust and you were careful, but the wires that connect them are 20+ years old and exist in a harsh environment. My first thought is that either insulation has degraded due to age and movement, or that the copper inside has corroded and no longer has a good connection. Both of these create the potential for bad signal from the speed sensor to the [BE]CU. I imagine there is a bench test write up around here somewhere for them, and that is where I would start.
 
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Old Apr 30, 2024 | 09:47 AM
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Originally Posted by sqlbullet
Years of troubleshooting in IT teaches me to look at what was changed or touched.

Ball joints aren't implicated by TC. But speed sensors would have been touched as a part of the process. As you mention, they are robust and you were careful, but the wires that connect them are 20+ years old and exist in a harsh environment. My first thought is that either insulation has degraded due to age and movement, or that the copper inside has corroded and no longer has a good connection. Both of these create the potential for bad signal from the speed sensor to the [BE]CU. I imagine there is a bench test write up around here somewhere for them, and that is where I would start.
Yeah I will see if they're both the same resistance anyway
 
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Old May 3, 2024 | 06:06 AM
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1.05 kohm each so they appear ok
 
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Old May 3, 2024 | 07:43 AM
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It happens when turning. Check to make sure there is sufficient slack in the sensor cables and they are not being slightly pulled when wheels are turned.
 
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Old May 3, 2024 | 12:04 PM
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My Centre Diff question is not about the front diff. It’s in the transfer case. If you remove either drive shaft, can you still drive it? There is probably an easier way to determine if it’s locked or not though.
 
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Old May 4, 2024 | 12:09 AM
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Looks like TC = Traction Control in this case (and Transfer Case in other cases).
 
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