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Old 06-25-2013, 10:36 PM   #31
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Quote:
Originally Posted by muherd50 View Post
fa310tx,
You need to change the speedo gear in your TC if you're sure your speedometer is off. Search for a chart that tells you the right size speedo gear (teeth count) for your tire size/gear ratio.
Thanks for the info.
I thought you could adjust the speedo, but I never knew how.
Does the tach need adjusted any, with gearing and tire differences, or would the RPMs be accurate?
JJ

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Old 06-25-2013, 11:15 PM   #32
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Originally Posted by Fa310tx View Post
Thanks for the info.
I thought you could adjust the speedo, but I never knew how.
Does the tach need adjusted any, with gearing and tire differences, or would the RPMs be accurate?
JJ
Tach is fine, its measuring the rotation of the motor not the transmission or axles.

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Old 06-26-2013, 07:51 AM   #33
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Here is a pretty cool youtube video that hits on gear ratios a little bit-

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Old 06-26-2013, 09:16 AM   #34
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Quote:
Originally Posted by Fa310tx View Post
Thanks for the info.
I thought you could adjust the speedo, but I never knew how.
Does the tach need adjusted any, with gearing and tire differences, or would the RPMs be accurate?
JJ
The tach reads whaever the engine is actually turning. The engine is mechanically coupled to the drive train. Changing the wheel size and or gearing impacts what the engine is running whan moving.
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Old 06-26-2013, 09:20 AM   #35
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Has Goodyear beefed up the Duratrac sidewall recently? Just curious since that's always been stated as the only reason not to buy them. Sorry replied to wrong thread. Duh

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