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Old Oct 25, 2005 | 07:20 PM
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I know nothing about gears and I am about to order a ring and pinion in 3.73 and was wondering if I need a new carrier also or will the stock one work. Also is my stock 99 carrier a series 2 or series 3?
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Old Oct 25, 2005 | 07:38 PM
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Since you have an M6, your stock gears should be 3.42, and you have a 3 series carrier. Why are you switching gears? 3.42 to 3.73 is not a very big change to spend the money on, unless you needed new ones anyway.
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Old Oct 25, 2005 | 08:44 PM
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I am having to go into the rear anyway to replace bearings so I figure I might as well do this while I am at it. I am going with 3.73 because 4.10 will kill my gas mileage too much. Like I said, I really don't know too much in this area.
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Old Oct 26, 2005 | 05:56 PM
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The stock carrier will work just fine . We have the gears in stock and on sale right now for $159.95 (Motive Performance) and we also have Master install kits which include new pinion and carrier bearings for $69.95 with free shipping . You can order online at www.neweraperformanceparts.com or call us during business hours at 585-865-1832 .

Mike
New Era Performance
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Old Oct 26, 2005 | 06:33 PM
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Originally Posted by 99M6Z28
I am having to go into the rear anyway to replace bearings so I figure I might as well do this while I am at it. I am going with 3.73 because 4.10 will kill my gas mileage too much. Like I said, I really don't know too much in this area.
4:10s won't hurt your highway mileage too much but will most likely seriously affect your city mileage as you will have trouble resisting the urge to stand on it
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Old Oct 26, 2005 | 07:27 PM
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Originally Posted by New Era Performance
The stock carrier will work just fine . We have the gears in stock and on sale right now for $159.95 (Motive Performance) and we also have Master install kits which include new pinion and carrier bearings for $69.95 with free shipping . You can order online at www.neweraperformanceparts.com or call us during business hours at 585-865-1832 .

Mike
New Era Performance
I've got Motive 3.73 gears, and I like them a lot.
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Old Oct 26, 2005 | 07:27 PM
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!f ya swap gears with some aftermarket one more than likely your going to get a small whine out of the gears unless you don't mind that!And way easyer to break!
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Old Oct 26, 2005 | 07:30 PM
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A little whine wont bother me cause I probably wont be able to hear it over the ORY-pipe and open Borla
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Old Oct 26, 2005 | 08:10 PM
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Motive Performance gears do not whine when set up right , never had a car come out of my shop louder than stock after install . Sometimes the 4.10's whine just a little , but it is hard to hear unless you really listen for it . Most guys with M6 go with 4.10's and A4's go with 3.73's , but it also does depend on what you are trying to achieve as well .
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Old Oct 27, 2005 | 09:47 PM
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Originally Posted by New Era Performance
Motive Performance gears do not whine when set up right , never had a car come out of my shop louder than stock after install . Sometimes the 4.10's whine just a little , but it is hard to hear unless you really listen for it . Most guys with M6 go with 4.10's and A4's go with 3.73's , but it also does depend on what you are trying to achieve as well .
No whining from my Motive 3.73's.
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