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Old 06-18-2012, 05:30 PM   #5
Alderson95
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Join Date: Oct 2010
Location: Whitney
Posts: 152
Re: 89 2500 Transmission/Rear End Questions

I am going to assume that when you were checking your speed you used a gps if so don't worry trust the truck 1mph off is nothing when I put bigger tires on my 95 gmc it threw the speedo off by like 8mph. But like I said just trust the truck gps is only acurate to a sertine point.
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