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Old 01-28-2023, 05:57 PM   #2
LS short box
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Join Date: Jun 2015
Location: Carlos MN
Posts: 2,091
Re: Driveshaft critical speed

On my LS swaps I have the tuner set the rev limiter at 6400-6500.
I like to upgrade to 1350 u-joints while I'm at it.
You didn't say if you have a long or short box. That makes a difference.
I would bite the bullet and get a new one. I've only used steel and never had an issue.
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