Gears?? Help?

[mclarengts]

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?

[Jake]

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?

[dereku]

sounds like OD off

[mclarengts]

Originally Posted by Jake

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?

Originally Posted by dereku

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?

[Jake]

When you turn the truck off and turn it back on it cancels out the OD lockout.

[highraven99]

Originally Posted by mclarengts

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

[mclarengts]

Originally Posted by highraven99

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??

[jesilvas]

The light will say whether it's on or off. OD is just 4th gear basically.

[Jake]

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.

[mclarengts]

oh ok thats what i was figuring