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Old 09-28-2010, 06:40 PM
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2010 RT classic rear end gears

I got my factory build sheet today and noticed that my 2010 Challenger RT Classic with an auto tranny has a 3.09 rear end gear in it. Is that normal? I would have thought a car with alot of spunk should have about a 4 or so. i would think that would kill your 0-60 time.
Thanks for your inputs,
Rick
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Old 09-28-2010, 07:15 PM
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That's what Auto's have in them. 6 Spd's get the 3.91's Sorry. Don't worry too much, that torque converter makes up the difference
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Old 09-28-2010, 08:22 PM
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Originally Posted by R/T Classic View Post
That's what Auto's have in them. 6 Spd's get the 3.91's Sorry. Don't worry too much, that torque converter makes up the difference
Well... the 6 speed cars with 18" wheels get 3.73 and with 20" they get 3.92.

Here's the "final drive" (trans gear X axle ratio) for the 6 speed w/3.73 (first column is transmission ratio second is the final drive ratio):

2.97 11.08
2.10 7.83
1.46 5.45
1.00 3.73
0.74 2.76
0.50 1.87


Here's the "final drive" (trans gear X axle ratio) for the 6 speed w/3.92:
2.97 11.64
2.10 8.23
1.46 5.72
1.00 3.92
0.74 2.90
0.50 1.96


Here's the "final drive" (trans gear X axle ratio) for the auto w/3.06:
3.59 10.99
2.19 6.70
1.41 4.31
1.00 3.06
0.83 2.54
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Old 09-28-2010, 11:44 PM
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Thanks for the info Is this the same for the super track pack cars?
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Last edited by mechaniac; 09-28-2010 at 11:49 PM. Reason: thought of a question
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