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4.0 in a jk?

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Old Jan 3, 2011 | 08:53 AM
  #11  
robin's Avatar
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Joined: May 2007
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From: slp. Mexico
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Originally Posted by dpoelstra
the 4.0 may be a good crawler, but it is a crappy driver. I never understood why the 4.0 stands in such high regard compared to the 3.8. I have had both and MUCH prefer the 3.8, once I did the CAI and Superchips!
this is exactly what I've been thinking, lately I've had the chance to drive a few tjs at work an they drive like crap!! I even remember somebody saying tjs were built for speed
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Old Jan 3, 2011 | 11:53 PM
  #12  
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Joined: Mar 2009
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From: Arvada, CO
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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.
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Old Jan 13, 2011 | 09:51 PM
  #13  
NH-JK's Avatar
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Joined: Aug 2009
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From: NEW HAMPSHIRE
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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.
X2 it's not like we drag race these bricks!
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Old Jul 11, 2011 | 11:31 AM
  #14  
Cruiser's Avatar
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Joined: Dec 2006
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From: Jim Thorpe, Pa
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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..
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Old Jul 12, 2011 | 06:18 AM
  #15  
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Joined: Oct 2010
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From: Manitoba
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I had a 04 TJ with a 4.0 and a 5spd, after driving my 2011 JKU with a 6Spd I dont miss the the TJ at all. The JK was a huge improvement in almost every way.
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