Thread: 3.90 gearing?
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Old 04-23-2013, 11:19 AM   #7
Tim99GT
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Join Date: Dec 2007
Vehicle: 1999 Mustang GT
Location: Lafayette, LA
Posts: 1,700
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I have 3.90 gears and loved them when i was N/A. Not so much now being boosted. Its too much gear for a boosted car i believe. 1st gear was pointless even @ 400RW...
Again, when i was N/A i loved them. I wasn't making a lot of HP so they performed great and 1st wasn't so short. As soon as i tear into the rear end I'm swapping them out for 3.55's
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