Changed left hand hub and still getting loudwhining/grinding. What am I missing?
09-03-2009, 07:43 PM
#22
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Ok, I just thought of something. I'm at the end of my rope here... so I'm going to do something crazy. I'm going to put my truck on blocks tomorrow ans secure it properly. Start in rear wheel drive, then in 4 wheel drive, turn the steering a few times. If I hear a sound, I'll locate where it's coming from quickly. Whether it's a gear or a bearing.
If I do not hear a sound, I'll have to assume that it's a bearing making noise under load. Correct me if my reasoning is wrong... But why would a gear make noise when there is weight on certain wheel but stop once that weight is gone? that doesn't make sense. If a gear was grinding when accelerating maybe that would make sense. At that point the gear is stressed between the weight of the truck and the engine's power. But in my situation, when free-wheeling, there is still grinding. At this point the gears don't have any stress as they aren't transfering any power. So why do they still grind as much? Furthermore, the grinding gets worse when i turn right and stops when I turn to the left.
So logically, it can't be my transfer case or front/rear differentials. Am I correct? Has anyone ever heard of a problem in differentials that worsens or stops depending on the weight on a certain wheel(s)?
Problem I have now is that i just drained the differentials, is it safe to have them running bare for 5-10 seconds at about 15mph without a load? (truck on blocks)
If I do not hear a sound, I'll have to assume that it's a bearing making noise under load. Correct me if my reasoning is wrong... But why would a gear make noise when there is weight on certain wheel but stop once that weight is gone? that doesn't make sense. If a gear was grinding when accelerating maybe that would make sense. At that point the gear is stressed between the weight of the truck and the engine's power. But in my situation, when free-wheeling, there is still grinding. At this point the gears don't have any stress as they aren't transfering any power. So why do they still grind as much? Furthermore, the grinding gets worse when i turn right and stops when I turn to the left.
So logically, it can't be my transfer case or front/rear differentials. Am I correct? Has anyone ever heard of a problem in differentials that worsens or stops depending on the weight on a certain wheel(s)?
Problem I have now is that i just drained the differentials, is it safe to have them running bare for 5-10 seconds at about 15mph without a load? (truck on blocks)
09-03-2009, 07:50 PM
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09-03-2009, 11:53 PM
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hmmm....You've lost me here... maybe I'm missing your point but...if the spider gears were the problem, wouldn't they make noise only when turning? Considering they don't activate in a straight line.
09-04-2009, 12:23 AM
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09-04-2009, 12:50 AM
#29
Either the other hub is bad, or the new one you installed is bad. I can't believe you haven't fixed this already. You are overthinking this thing to death. I'm not trying to give you a hard time, just trying to give you solid advice. 14 years with GM and 18 years in the auto-service industry is my background. Hope you have it repaired soon. Good luck.
09-04-2009, 06:59 AM
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Either the other hub is bad, or the new one you installed is bad. I can't believe you haven't fixed this already. You are overthinking this thing to death. I'm not trying to give you a hard time, just trying to give you solid advice. 14 years with GM and 18 years in the auto-service industry is my background. Hope you have it repaired soon. Good luck.