I have a 2015 Sahara JKU with 3.73s. This weekend on a road trip I found myself cruising at 85 - 90 mph with no issues.........I still have the stock 18 inch tires if that makes a difference? What is the reason 3.21s would be better for this driving speed? Better gas mileage? I'm a NewB so I have no clue. Please let me know. ThanksMy jku has manual 373, my wife's has auto 321. Just ordered my 15 jku with 373 again. I would never get another one with 321 unless you plan on doing 90mph on the highway
Better gas mileage but you sacrifice on performance, especially when going with larger tires and wheeling.I have a 2015 Sahara JKU with 3.73s. This weekend on a road trip I found myself cruising at 85 - 90 mph with no issues.........I still have the stock 18 inch tires if that makes a difference? What is the reason 3.21s would be better for this driving speed? Better gas mileage? I'm a NewB so I have no clue. Please let me know. Thanks
3.21's are better on fuel, sure. you might get 15 as opposed to 14. my point is, MPG doesnt matter when you get a jeep, and if you cant afford to fill up 20 miles earlier, go buy a prius.I have a 2015 Sahara JKU with 3.73s. This weekend on a road trip I found myself cruising at 85 - 90 mph with no issues.........I still have the stock 18 inch tires if that makes a difference? What is the reason 3.21s would be better for this driving speed? Better gas mileage? I'm a NewB so I have no clue. Please let me know. Thanks
not even worth the money to do so. Jump up a bit more to make it worthwhile.My 2012 Wrangler Sport has 3.21's and I really want to switch to 3.73's. Guess I need to find a complete kit and have it installed.
:mooning:3.21's are better on fuel, sure. you might get 15 as opposed to 14. my point is, MPG doesnt matter when you get a jeep, and if you cant afford to fill up 20 miles earlier, go buy a prius.
What about 4.10's?not even worth the money to do so. Jump up a bit more to make it worthwhile.
I've done over that with 3.73's and actually get the best gas mileage when I do. On three separate occasions I've opened her up for extended periods and averaged over 20 mpg. Normal driving gets me, at most, 18.5 on a good day. Apparently these 3.6L really enjoy high speeds. :thumb:My jku has manual 373, my wife's has auto 321. Just ordered my 15 jku with 373 again. I would never get another one with 321 unless you plan on doing 90mph on the highway