New 15” Wheels. What gear ratio?

[sgtsandman]

I have been looking in the Tech section to see the codes.

Beautiful! I forget that it is there sometimes. So, it's great that you are doing so already. I need to practice what I preach better at times.

 

[gungfudan]

Beautiful! I forget that it is there sometimes. So, it's great that you are doing so already. I need to practice what I preach better at times.

Gear ratio is 3.45 I need to go 3.73. I do a fair amount of highway miles, but I carry the majority of my tools in the back because I am a handyman. I also live in the mountains so I need the truck to have some more torque.

 

[sgtsandman]

Gear ratio is 3.45 I need to go 3.73. I do a fair amount of highway miles, but I carry the majority of my tools in the back because I am a handyman. I also live in the mountains so I need the truck to have some more torque.

If the mountains are anything like around here, 4.10:1 might serve you better. I had 3.45 in my 1998 and it was a dog. Granted, the 2.5 Lima isn't exactly a power house of an engine. Going to 4.10 woke the truck up and the fuel mileage never changed.

3.73 gears in my 2011, with the 4.0 SOHC and stock tires (235/75R15) were mostly adequate but were found wanting on some of the steeper grades, requiring downshifting that in my mind shouldn't have had to happen. With 31" tires, the truck can really struggle now. 4.10 will get it back to about where it was and 4.56 will likely get me where I want. 4.27 gear would be ideal but they don't make those for the Dana 35 front axles. Even the 8.8 axle gear set can be hard to find.

4.10 axles are not as common, so finding them may be a bit of a hunt. 3.73 should give you a bit of boost though. So, if you are mostly happy with how the truck drives now. 3.73 should be the "Chef's Kiss". Only you can really decide that.