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10-28-2007, 07:36 AM #1
General Motors 12 Bolt Rear End Assy
Who makes a good strong & lightweight 12-bolt rear end that will bolt right up and be quiet enough for the street ?
When I say quiet I mean NO howling or whine noise .
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10-28-2007, 08:36 AM #2
I'm not sure on noise but Moser is pretty popular on these boards...
Moser 12bolt = a4
Moser 9" =m6
Strange Dana S60 = big horsepower
The Moser 12bolt bolts right up and the 9"/S60 require the driveshaft to be shortened, though they can withstand more abuse than the 12 bolt.
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10-28-2007, 08:55 AM #3
- Join Date
- Jun 2007
- Location
- Lathrop, Missouri
- Posts
- 2,482
NBM / Silver- 00 SS / 71 SS Elcamino
9" does not require your drive shaft being shortened only the S60. I should know, I have a 9". also the 12 bolt and the S-60 torque arm mount is not as good as the 9". I have done a lot of reasearch and people are haveing problems with gear whine on the 12 bolt and the strange dana 60 due to the torque arm mount tweaking the housing and causeing gear whine. The 9" does not have that problem and they have a much better torque arm mount design.
2000 SS Camaro Heads, Large cam, Fast 90, 9"w/430's and locker, yada yada yada... you get the picture
1971 SS ElCamino 402 Big Block 550HP
2006 Silverado 2500HD 496 cubic inches of pure muscle
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10-28-2007, 09:00 AM #4
- Join Date
- Jun 2007
- Location
- Lathrop, Missouri
- Posts
- 2,482
NBM / Silver- 00 SS / 71 SS Elcamino
look at this thread for more info. http://www.ls1.com/forums/showthread.php?t=66740
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10-28-2007, 09:10 AM #5
i second, the whine or gear noise is caused by a bad install with a lot of play
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11-03-2007, 12:57 AM #6
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11-03-2007, 12:58 AM #7
- Join Date
- May 2007
- Location
- Seattle
- Posts
- 88
Purple- 1998 T/A convertable
The whole point of helical cut gears is to allow a smooth transition from tooth to tooth. If they're off, it defeats the point. Straight cut are a bit more efficient, but sound like a blower.
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11-04-2007, 06:26 PM #8
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