Quote:
Originally Posted by Sax1031
Not exactly sure.
I think it is a loop hole in the EPA testing. They can get by with testing the base car and add the option for gear and not have rate again for gearing.
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Quote:
Originally Posted by syr74
I worked with the epa and NHTSA on a certain project, and while it wasn't the focus of what we were doing it did invollve fuel economy and as such I can tell you from my own experience that the EPA does not require re-cert. for optional axle ratios. You certify with whatever the standard ratio is and that's it.
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Then Chevy should drop a set of 4:10 rear gears in and see what happens..
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