just drove my truck for the first time after putting the 4.88's in the back. To be honest, I didn't feel that much of a difference over the 4.10s. Granted, it had been a few weeks since I drove it and since that time I have driven much better powered vehicles...I am running bfg a/t 31 10.50's with a 4 banger. The more I think about it, I guess there was a difference. I didn't go past 40 though, so I guess I may see a difference on the interstate. I noticed that when I stomped the gas to pull out it did rev up faster and higher. <img src="/forums/images/graemlins/lol.gif" alt="" /> Still very happy with the new gears though!