Thanks Hot Rod Dad! I was wondering what driving in the city would be like as well. The 4.11 does ok below 45 mph, but I live in rural W.Neb attm and do quite a bit of hwy driving. With the 3.73 I won't need a new case in the swap, however will there be a noticable difference at highway speeds. Not worried about 75 mph but would like to go 65 mph with out revving to high. Maybe 3.4X to the 3.55 would be the best? BTW I grew up in Lakewood, say hi to the mountains for me! Regards, Dennis