I have 4:88 gears but yeah.......it doesn't help much. I started with 36's, stock gearing. Went on to 37's with stock gearing for about 1 week. Went to 37's and added the 4:88's. Now with 4:88's and 39.5's. I ran the 36's and 37's on the 3:73's for 35,000 miles. I know that did help but i'm sure...