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  #1  
Old 07-22-2010, 08:02 PM
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Default Normal for 4.7 gears to whine when new???

As the title says. NEw gears in there and they wine. Randy did yours wine???
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Old 07-22-2010, 08:43 PM
J Kimmel J Kimmel is offline
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are you talking high range or low? running around fire roads in low or low low it whines a bit. on the highway, etc in high range, no.

I had a CJ-7 once with a dana 18 in it and as it turned out the output gear was a cheap charlie from China, and it whined the entire time I had it, and eventually ate the gears. when I pulled everything you could see the horrific wear pattern on that gear

have you called Marlin? could be new bearings just breaking in, tight tolerances.
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Old 07-22-2010, 08:52 PM
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My Marlin 4.7 gears had more whine than stock in low range.
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Old 07-23-2010, 07:51 AM
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My 4.7s whine more in low especially with the tranny in 3, 4, or 5th. The thing is spinning FAST. But I gather this is more noticeable than the last set? Check with Marlin. You did get 'em from him?
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Old 07-23-2010, 08:42 AM
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He didn't have 4.7's in the last set.

Mine whine in low. Like Bill, in 3, 4, or 5.
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Old 07-23-2010, 09:30 AM
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Same here, whining in low, I think he got his from TrailGear, but they have good tech & customer support too.
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Old 07-23-2010, 09:59 AM
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:edit: Geiger Mart bashing comments deleted.....
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Old 07-23-2010, 10:11 AM
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I hear whining from the back of the 40 whenever my kids are back there
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Old 07-23-2010, 10:13 AM
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I hear whining from the back of the 40 whenever my kids are back there
Usually hear whining from mini truck drivers!
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Old 07-23-2010, 10:13 AM
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Usually hear whining from mini truck drivers!
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