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Are 3.90's really more loud?

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Old Mar 25, 2004 | 12:58 AM
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Default Are 3.90's really more loud?

I plan to get my 12 bolt soon and maybe going to do 3.90's. I want the 3.90s over the 4.10's because the car might have gas on it one day. I just think the 3.90 is a perfect medium. But some people say they are alot more loud for some odd reason. Let me know guys.
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Old Mar 25, 2004 | 06:33 AM
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My 3.89's in my 9" are pretty quiet
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Old Mar 25, 2004 | 07:17 AM
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i got 390s they howl pretty good from 50-68 or so, their in my moser 12 bolt, never got any quieter or louder with plenty of abuse.....im swapping to 410s in my full H/C car, IMO just go 410s until you get nitrous gears are cheap for 12 bolts, 390 is a richmond cut gear, some people say its louder cuz of that some say its cuz of the way they set them up, i think its a little of both, but im going to swap to a 410(not a richmond gear) and have a friend set them up nice and quiet for me, plus it will help this heavy *** WS6 get outta the hole better, unless you do alot of highway racing 410s are the way to go.
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Old Mar 28, 2004 | 11:54 PM
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I want to do 3.90 when i get a 12 bolt seems like a perfect in between. Although i know i could have fun with a 4.56!!!! Hey really stupid question , but is ther any way to put 3.90 gears in a 10 bolt?
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Old Mar 29, 2004 | 12:38 AM
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Originally Posted by Kurtomac
i got 390s they howl pretty good from 50-68 or so, their in my moser 12 bolt, never got any quieter or louder with plenty of abuse.....im swapping to 410s in my full H/C car, IMO just go 410s until you get nitrous gears are cheap for 12 bolts, 390 is a richmond cut gear, some people say its louder cuz of that some say its cuz of the way they set them up, i think its a little of both, but im going to swap to a 410(not a richmond gear) and have a friend set them up nice and quiet for me, plus it will help this heavy *** WS6 get outta the hole better, unless you do alot of highway racing 410s are the way to go.
what if I got 3.90's and hed them reset to be quiet
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Old Mar 29, 2004 | 12:45 AM
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maybe if you run a thicker oil they might quiet them down a bit
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Old Mar 29, 2004 | 03:48 PM
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the rear end in my car is my friends old rear end....he tried a thicker oil once, it worked on the noise....lost 10rwhp on the dyno
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