What's the name of the tire and the complete size?

 

did you have 3.55's or 3.73's stock? normally one gear change is so slight, it's rarely worth the cost. If you're final trans ratio is .70 to 1 (no idea on the 01's but the 04-08's were that. if so, you'll be at 1992 rpms at 65 mpg where 4.10's would be 1790. personally i don't think 1992 is terrible but to each their own

 

I have 35 12.5 17 fierce attitude mts and my gear ratio from the factor is 3.55 and it doesn't drive bad now as it is. My old truck had 4.56s and I miss the power towing

 

I'm running almost exactly 1600 at 65 speedo is exact set by my edge