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3.90 or 4.10 in AUTO?

Old 11-11-2007, 10:23 PM
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Default 3.90 or 4.10 in AUTO?

With my mods in my sig, would you guys recommened 3.90 or 4.10. I am switching out my rearend and going to put a 9 inch in. I want it to be nasty. But i have heard that 3.90 can be noisy is this true?
Old 11-12-2007, 07:19 AM
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3.90...
Old 11-12-2007, 10:09 AM
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Had 3.90 Motive performance in my 10 bolt they were nice. Went with 4.30 Motives in my 9" Both have been quiet.

Last edited by Jays00ss; 11-12-2007 at 03:02 PM.
Old 11-15-2007, 12:13 AM
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looking for some opinions and experiences please.
Old 11-15-2007, 10:20 AM
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I am using 3.73's and crossing the line at 6,000 rpms. I have a little more stall and the 3.90's will be perfect. So, with your mods, go with the 3.90's.


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