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Old 07-08-2009, 07:32 PM   #1
john02fxdl
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Join Date: Oct 2008
Location: Avondale, PA. South east corner of the state
Posts: 75
Speedo question?

OK, I need some input. I just got my 70 stepper on the road and my speedometer is WAY off. I'm running a 350, th350 trans, 3.08 gear in the rear and 235/75/15 all the way around(approx. 29" tall tire). While I'm driving the truck, I think I'm doing around 30-35 mph but the speedo shows 100mph. What gives? I looked through the forums and guys have the problem with a 5mph off scenario. I'm off by like 70mph!!! Could my drive and driven gears be that far off? The trans was rebuilt and came out of an early to mid 80s chevy something. I bought the trans done already. It shifts great and the truck drives great, but I am stumped on this speedo. I looked at the sites on how to chose the drive and driven gear setup but I was wondering if anyone who is running the same combo I am could remember what color their drive and driven gears are in the trans. Any help????
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