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1980 4 Speed gear ratios

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Old 07-17-2002, 02:54 AM
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corvgreg
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Default 1980 4 Speed gear ratios

What are the gear ratios in the 4 speed transmission for the 80...it went to a wider ratio but I can't find the numbers. Thanks in advance for the help.
Old 07-17-2002, 01:24 PM
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45ACP
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Default Re: 1980 4 Speed gear ratios (corvgreg)

It is a Borg Warner Super T10 with the following:

2.88, 1.91, 1.33, 1.00, (R)2.78

The RPO was "M18".
Old 07-17-2002, 02:40 PM
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Default Re: 1980 4 Speed gear ratios (45ACP)

Thanks for the response...I thought it was a Super T10 but the "M18" in the book threw me off..."M" for Muncie. The rear ratio for this is 3.07, right?
Old 07-20-2002, 09:57 AM
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Default Re: 1980 4 Speed gear ratios (corvgreg)

greg, the rear end ratio of an '80 is a 3.07:1 providing it's never been changed by another owner. Also, the transmissions are BW T-10's. GM for some reason kept that "M" designation well after the Muncie trans were not being use anymore after about Feb/March of '74.

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