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Old 09-19-2010   #5
asshanson
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Join Date: Oct 2005
Location: West Des Moines
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Re: Miata+4g63+T56=awesomeness!

Don't use the 04/05 CTS-V rear diff, the case is not strong. The 06/07 is a bit stronger though. Maybe you're talking about an 09+ rear diff, but I imagine those are $2k+ and impossible to find used.

My T56 is holding 520wtq, and I know a few V guys are running at least 600wtq on them without any issues, never revving past 6500-7000rpms though. I bet the Viper guys spin them faster, but the Viper spec ones are pretty spendy. Maybe slowbubblecar can chime in on those.
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