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Old 04-16-2013, 11:30 AM   #4
Stingray
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Quote:
Originally Posted by Bolt-onC6 View Post
What does the A1 mean for the 2.56 rear axle ratio? I know the A means available. So what is standard if 2.56 is available?

I had the 2.56 on my 2007 Corvette and it renders 6th gear very nonresponsive. I put in a 3.15 in my 08 Z51 that had the 2.73 and 6th was so much better. Pulled very good and only lost 1-1/2 mpg.
Correct that A = Available/Optional. Code GU6 (3.42) is the standard rear across the board... unless you get an Automatic. 2.56 on non-Z51 autos, while 2.73 with the Z51 option on autos.
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