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Old 08-23-2020, 02:36 PM   #2
gmc684x4
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Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
Re: Electronic or mechanical speedo?

700r4 can run a mechanical speedo
I would keep it stock

If your running a 4.8 5.3 6 liter with 4l60e 4l80e then i would look at electric speedo as the new tranny has no mechanical provisions and the computer for the engine needs a speed input
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