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gonzo6869 · 11-30-2010, 10:13 PM

You said you have 4.11 gears and an automatic; I am going to guess a th350. You can always do the math and find out if it’s the tach dash that’s off or the old one, maybe a bit of both.

Check out this link and enter your information and you'll get your correct RPM and Speed,

http://www.pszweb.com/car/gears.htm

11-30-2010, 10:13 PM	#13
gonzo6869 Cops, ha, catch me if you can! Join Date: Jun 2009 Location: Santa Barbara, CA. Posts: 271	Re: Tach Problems You said you have 4.11 gears and an automatic; I am going to guess a th350. You can always do the math and find out if it’s the tach dash that’s off or the old one, maybe a bit of both. Check out this link and enter your information and you'll get your correct RPM and Speed, http://www.pszweb.com/car/gears.htm __________________ 72 C-10 Stepper 350/TH350 3.73 in the back Edelbrock intake and Carb Hooker Comp Headers 275/60R15 on Rallies