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Gears for a 99 auto

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Old Apr 12, 2009 | 09:55 AM
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Default Gears for a 99 auto

Thinking about putting gears in my 99 automatic. Would 373 be too much for the highway??? I;m not worried about gas milage but i dont want to lose too much top end
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Old Apr 13, 2009 | 12:03 AM
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Originally Posted by jerseynick
Thinking about putting gears in my 99 automatic. Would 373 be too much for the highway??? I;m not worried about gas milage but i dont want to lose too much top end
I have a 2004 C-5 convertible and I put in 373 gears, also a 2800 stall torque converter. It's amazing, a whole new car. Don't worry about top end, 6000 rpm's in o.d. is 170 mph. i've only been to 150. Also 80 mph is about 2600 or 2700 rpm's, so it's fine for the x-pressway too. Gas milage is over 20 mpg on the highway so it's a great combination ........bob.
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Old Apr 13, 2009 | 04:21 AM
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Go for it!
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Old Apr 13, 2009 | 08:33 AM
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this sounds great to me too! I am in the process of having my 3.15 replaced with a 3.73, along wiht a new tranny and tc...
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Old Apr 13, 2009 | 08:42 AM
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How much (approximately) money does it cost for each step?

Gears - $$$$$$ -?
Stall - $$$$$$ - ?

thanks
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Old Apr 13, 2009 | 09:03 AM
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Here is what I paid:

RPM Stage 3 Diff, w/ 3.73 ratio, upgraded to a 3 rib design (extra $350)* $2,645.95
Precision Industries (Vigilante) Custom built converter 2600rpm stall* $895.95

and then, there is to labor costs...
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