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Old 09-09-2007, 08:44 AM   #1
wfbont007 [OP] wfbont007 is offline
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Front diff noise

I have a 2006 4x4 four door Tacoma with a 3 inch Toytec lift. When I drive down the street at around 40mph, it sounds like I have mudders on my truck. There is a distinct hum but I don't have mudders and it sounds like my front diff case. If I put the truck into 4 wheel high when the hum starts, it goes away. At road speed there is no hum. When I decelerate to come to a stop, the hum begins at 40 mph and lasts for a couple of seconds before it stops. Anybody heard of this problem or have recommendations?
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Old 09-09-2007, 09:13 AM   #2
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Quote:
Originally Posted by wfbont007 View Post
I have a 2006 4x4 four door Tacoma with a 3 inch Toytec lift. When I drive down the street at around 40mph, it sounds like I have mudders on my truck. There is a distinct hum but I don't have mudders and it sounds like my front diff case. If I put the truck into 4 wheel high when the hum starts, it goes away. At road speed there is no hum. When I decelerate to come to a stop, the hum begins at 40 mph and lasts for a couple of seconds before it stops. Anybody heard of this problem or have recommendations?
When you did your lift did you do a front diff drop also?

I have heard that tacoma's have problems with the CV joints when lifted, but I do not have any first hand experience with this, just things I have heard.
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Old 09-09-2007, 10:08 AM   #3
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I did the front diff drop also. Today, I removed the drop and test drove and the noise was still there. I re-installed the drop and still there. The noise is inconsistent, sometimes it is more noticeable than others.
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Old 09-09-2007, 10:29 AM   #4
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Quote:
Originally Posted by wfbont007 View Post
I did the front diff drop also. Today, I removed the drop and test drove and the noise was still there. I re-installed the drop and still there. The noise is inconsistent, sometimes it is more noticeable than others.
Sorry, I am at a loss then, though I suspect that come monday morning when they are back at their computers some of the members more knowledgable about lifting trucks than I am should be able to help you.
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Old 09-11-2007, 06:48 AM   #5
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Is there a possibility that the front drive shaft is turning by 4x4 isn't engaging?
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Old 09-13-2007, 01:31 PM   #6
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Just got the truck back from the dealer. He told me that because there are no shims on the back end for the diff, it is causing a vibration in my front diff/ transfer case. I'm not buying it. Going to a 4x4 shop tomorrow.
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Old 09-28-2007, 09:31 AM   #7
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Truck is fixed. Rear shims did the trick.
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Old 09-28-2007, 10:25 AM   #8
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nice, glad to hear you got it taken care of. I'm gonna add the toytec in the future and i'm glad to know what to do if i have the same problem
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