4.0 in a jk?

I don't get it either (+15?). The torque and horsepower curves are nearly identical, the 3.8 gets better mileage, and even if the 3.8 blows out early it would still be cheaper to put in several of these before on 4.0 swap paid off. I don't understand the hate on the 3.8. If the TJ had a 5.0 V8, and had went to a 3.8 V6, sure maybe. But the engines are nearly identical.
Originally Posted by rickyj
I don't get it either (+15?). The torque and horsepower curves are nearly identical, the 3.8 gets better mileage, and even if the 3.8 blows out early it would still be cheaper to put in several of these before on 4.0 swap paid off. I don't understand the hate on the 3.8. If the TJ had a 5.0 V8, and had went to a 3.8 V6, sure maybe. But the engines are nearly identical.
The 4.0 had a slight, very slight advantage off-roading.. but the 3.8 is a better motor everywhere else.. I've had several 4.0's and 2 3.8's now and a 3.7 libby and must say I'd take my 3.8 over them all.. but I'm liking the rumors of the new v6 coming out.. more HP and torque.. time will tell if they make power in the right places.. MPG is better highway as rumors have it around 26mpg highway.. for a brick that aint bad..


