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Old 02-08-2010, 06:06 PM
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Gears?? Help?

Ok so I did the check for my gear ratios.. I rolled the truck, and after one revolution the driveshaft turned 3.75 times. So Im guessing the gear ratio is 3.73? So now Im wondering why truck is at 2k RPMs and only doing like 55mph? could the overly wide tires cause this? they are 33x15.50s. any suggestions?
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Old 02-08-2010, 06:32 PM
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Wider tires will not affect your gearing at all. Taller will though.

Based on the rpms you say, it looks like you have 4.10. But if you said it spins about 3.75 times you have 3.73, so i dont' know. Is your trans going into over drive? is your torque converter locking?
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Old 02-08-2010, 06:35 PM
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sounds like OD off
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Old 02-08-2010, 06:44 PM
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Quote:
Originally Posted by Jake View Post
Wider tires will not affect your gearing at all. Taller will though.

Based on the rpms you say, it looks like you have 4.10. But if you said it spins about 3.75 times you have 3.73, so i dont' know. Is your trans going into over drive? is your torque converter locking?
Is there any other way to tell for sure to be 100% sure?

Quote:
Originally Posted by dereku View Post
sounds like OD off

Humm when I driving tomorrow Ill set the cruise and press the button button and see, will the OD stay off, or will it reset every time I turn the truck on and off?
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Old 02-08-2010, 07:01 PM
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When you turn the truck off and turn it back on it cancels out the OD lockout.
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Old 02-08-2010, 07:14 PM
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Quote:
Originally Posted by mclarengts View Post
Ok so I did the check for my gear ratios.. I rolled the truck, and after one revolution the driveshaft turned 3.75 times. So Im guessing the gear ratio is 3.73? So now Im wondering why truck is at 2k RPMs and only doing like 55mph? could the overly wide tires cause this? they are 33x15.50s. any suggestions?
33's are taller than stock and you have to turn overdrive off every time you start the truck
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Old 02-08-2010, 07:19 PM
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Originally Posted by highraven99 View Post
33's are taller than stock and you have to turn overdrive off every time you start the truck
Why do I have to turn it off, everytime I start the truck??
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Old 02-08-2010, 07:25 PM
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The light will say whether it's on or off. OD is just 4th gear basically.
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Old 02-08-2010, 07:26 PM
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You don't have to turn it off to start the truck. What he is saying is that if you want overdrive off, you have to shut it off every time you restart the truck.
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Old 02-09-2010, 03:15 AM
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oh ok thats what i was figuring
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