thinking about 373s
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http://www.f-body.org/gears/ Plug in your stuff in here it will tell you exactly. You should be around 2150-2200 rpm @ 65 mph with 3.73's.
Now mind you, if a car has a converter, it may have some slip but being it should be stock, there should be no addition RPMs even though stock tachs cant read worth a damn.
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All M6 F-Bodys have 3.42's from the factory so you have a 3 series carrier
Automatic Fbodys without the GU5(3.23) option come with 2.73's, they make for excellent gas mileage but shitty ET's
Rob @ Strictly does gears, install kit, fluid, installation, and computer adjustments for $550-575
Automatic Fbodys without the GU5(3.23) option come with 2.73's, they make for excellent gas mileage but shitty ET's
Rob @ Strictly does gears, install kit, fluid, installation, and computer adjustments for $550-575