84-85 Trucks & 4Runners 2nd gen pickups and 1st gen 4Runners with solid front axles

4.7 t case roar

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Old Dec 9, 2012 | 01:26 PM
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From: alabama
4.7 t case roar

i had a 4.7 gear set put in my 4runner now it roars alittle bit . no vibrations just a slight noise its more noticeable in 3rd thru 5th. just trying to figure out what it is
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Old Dec 9, 2012 | 03:03 PM
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Is thus while in 4hi? There should be any noise unless the case wasn't clearanced enough
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Old Dec 9, 2012 | 05:39 PM
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Single case or duals? 4.7s always sound a bit louder to me than the stock stuff but it really isn't a "roar". If it's roaring something is wrong.

:wabbit2:
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Old Dec 9, 2012 | 05:46 PM
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My 4.7 case is noticeably louder..in low..
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Old Dec 9, 2012 | 06:25 PM
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its a single case and it only does it in low. i have changed the gear dope a few times and not noticed any debris. its not really a roar its more like hearing the gears turning

Last edited by SHINE RUNNER; Dec 9, 2012 at 06:35 PM.
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Old Dec 9, 2012 | 09:11 PM
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its normal for reduction gears like 4.7s to whine in low range.

its even worse when you have dual t cases with 4.7 in the rear.....
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Old Dec 10, 2012 | 04:04 AM
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i'm doing duals in a few weeks and putting the 4.7 in the rear thanks for the advise
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Old Mar 5, 2013 | 03:29 PM
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after i done the duals the case is alot quieter no noise at all really
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