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Re: are 3.08 gears good with 200r4?
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Originally Posted by vasquezmrysvll
i dont really understand why my 85 iroc came with 2.73 rear gear, 700r4 and 245/50r16 if everyone says 3.08's are too numerically low?
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Two words: fuel economy. With that tall of a rear end coupled with that deep of an overdrive, the engine would be barely ticking over during flat cruising/fuel economy testing. Low RPM + light throttle = high mileage. When I bought my '89 Caprice, it had a 305/700-R4/2.73 & 235/60R15s.* 2000 RPM was 81 MPH, so 55 wasn't even 1500.
Come to think of it, there was even a 2.56 available for the B-bodies. My Gramma's '88 has that one.
*From the factory, it was a 305/200-4R/2.73 with 205/70R15s.
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'67 C20--427 tall deck/SM420, 4.10 HO52 (Michigan has not been kind to the Old Man)
'95 Caprice--355 LT1/T56/3.42 8.5" 10-bolt (daily driver, almost 300k on the chassis)
'07 Outback--wife's car. 125k & counting. No head gasket or transmission issues yet. *fingers crossed*
Last edited by CE20934; 10-18-2010 at 07:30 AM.
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