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Old 11-21-2007, 04:44 PM
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3.42 1st gear and 3.70 rearend

a borg warner super t10 with a first gear of 3.42 can I use a 3.70 rearend, it is going in a 56 chevy, thank you for the help retired 56 also it has a 355 in it

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Old 11-21-2007, 05:56 PM
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t 10

I ran 1 back in the 6 t's in a 57 327 and it was great. 4.11 was stock 4 55,56, and 57 stick shifts automatics were 373 anyway. It want do much for your gas mileage.
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Old 11-21-2007, 07:08 PM
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Originally Posted by lanierledford
I ran 1 back in the 6 t's in a 57 327 and it was great. 4.11 was stock 4 55,56, and 57 stick shifts automatics were 373 anyway. It want do much for your gas mileage.
That sure is news to me as we use to seek out 6 cyinder standards in the wrecking yards because they had 3:70's in them. I don't ever recall running across a 55, 56, or 57 with a 4:11 OEM.

Vince
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Old 11-21-2007, 09:26 PM
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axle ratios

I would think that most of the 55,56 and 57 rearend were probably ripped out and replaced with 3.73, 3.56, and even 3.36's, the chunks would inter change up until 64. Best I can remember, my 64 Impala conv. 400hp 409 4 speed can from the factory with a 3.73 prostration. I do remember, if you power shifted it to 2nd, it'd rip the spider gears out of it. I think when I let it go it have a 3.36 tho.
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Old 11-21-2007, 09:50 PM
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Quote:
Originally Posted by lanierledford
I would think that most of the 55,56 and 57 rearend were probably ripped out and replaced with 3.73, 3.56, and even 3.36's, the chunks would inter change up until 64. Best I can remember, my 64 Impala conv. 400hp 409 4 speed can from the factory with a 3.73 prostration. I do remember, if you power shifted it to 2nd, it'd rip the spider gears out of it. I think when I let it go it have a 3.36 tho.
64 Impala gear options were 3.08, 3.36, 3.55, 3.70, 4.11, 4.56
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Old 11-22-2007, 07:35 AM
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Originally Posted by 1930u
64 Impala gear options were 3.08, 3.36, 3.55, 3.70, 4.11, 4.56
Correct, the 3:73 and 4:10 ratios came along later in the integral axles.

Vince
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Old 11-22-2007, 11:08 PM
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I think it will work nice!
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Old 11-22-2007, 11:56 PM
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Hi,
Here is a gear ratio calculator.

www.grimmjeeper.com/gears.html

Take care,
rich
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