Jeep Wrangler Forum

Jeep Wrangler Forum (http://www.wranglerforum.com/)
-   JK General Discussion Forum (http://www.wranglerforum.com/f274/)
-   -   3.8 vs. 3.6 (http://www.wranglerforum.com/f274/3-8-vs-3-6-a-122375.html)

TurboTony84 11-12-2011 10:11 AM

3.8 vs. 3.6
 
possibly looking to buy a JK wrangler. i know that the 3.8 is a minivan motor that replaced the 4.0 (a damn shame for the 4.0 was a great motor). from what i gather, 2012 came out with the new 3.6. what is the deal with the new 3.6? is that the same motor in the new grand cherokee? looking to get more info about it. performance, upgrades, reliability, etc. any info would be great. i had an 02 TJ. besides the crappy gas mileage, i absolutely loved it. i see alot of the newer wranglers, and there slowly growing on me, but im not really fond of the 3.8 v6...

kbwwolf 11-12-2011 10:19 AM

Both are minivan motors, but the 3.6 would beat the 3.8 in a race. :D

cu in oz 11-12-2011 10:20 AM

:popcorn:The 3.6 is 0.2 smaller.

joe002 11-12-2011 10:31 AM

Quote:

Originally Posted by TurboTony84 (Post 1739352)
...but im not really fond of the 3.8 v6...

Then don't get one.

kbwwolf 11-12-2011 10:32 AM

Some links to posts that deal with the 3.8 vs the 3.6:


3.8 & 3.6 Dyno Results


Pentastar 3.6 V-6

tcass 11-12-2011 10:38 AM

I like the 3.6 in the 2012. i think they are the motors in the new grand cherokee. I had the 3.8 in my 2007 Wrangler with a 6 speed and 3.21 rear. Hated it performance wise. wouldn't advise getting a 2011 as i think you might be disappointed :hide:. i know there are a lot of guys that love there pre 2012 3.8 engine. for me it was likely the 3.21 that i was having real problems with rather than the engine. However, having a 2012 Rubi with a 6 speed 4.10 comes close to the 4.0 in torque (imho), or at it feels similar to my 98 TJ to me except more fun :thumb:. its really slow when in low low 4 x 4, which i really like. while i don't do any rock crawling i go hunting in the NE where you can just run into just about anything from rocks to mud to creeks on old logging skid roads.
My advice would be to go drive one. Just remember to leave your wallet at home. :popcorn:

cass :wavey:

Dylanjwhall 11-12-2011 10:39 AM

yes it is the motor in the new Grand Cherokee. is may be .2 smaller but it has 83 more horses and 23 more ft lbs of torque, also its a DOHC with VVT (vtech) so you get better gas mileage on top of getting more power. 90 lbs lighter exhaust manifolds are built right into the head so there is no need for headers. the oil filter is right underneath the engine cover so doing an oil change is extremely easy (except for me who was searching under the jeep for over 20 min before i said screw this and used google) the motor is also in the v6 challenger and only does 0-60 .2 seconds slower. but the 3.6 does 0-60 2.5 seconds faster than the 3.8. All around the 3.6 motor is better. Chrysler/dodge/fiat/jeep is slowly integrating the motor into all of its vehicles and its the new poster child. i love mine and i love the faces other jeep owners get when they see how quick it is. and the last thing i had my jeep headlights deep in water and she dredged through it with no problem and has been running fine since :thumb:

Al Nebular 11-12-2011 11:05 AM

I recently took delivery of a 2012 Wrangler Sport with the new Pentastar motor. I could not be happier. It is smooth and powerful. A big plus for 2012 is the new 5 speed auto trans. This is my first Jeep without a clutch, but so far I am very pleased.

TurboTony84 11-12-2011 11:15 AM

Quote:

Originally Posted by joe002 (Post 1739375)
Then don't get one.

Im not posting on here to get bashed. Im on here for some good feedback. Telling me not to get one is not good feedback. To everyone else, thank you. I was checking out all the different options and what not on the jeep website. I'll go and take a look at the new 2012 wranglers some more, and I'll research a bit more before making the jump to buy one. it sounds as though the 3.6 is a pretty solid motor. I think its different to see that you can buy right hand drive wranglers as well. i'm sure you would have to order and wait for something like that, but it sounds like something the post office guys would use. and like i said before, this is just merely to point out some key differences between the 2 motors so n00bs like myself to the JK world can get some insight on this topic. I'm sure it has come up before, and will come up again...

kbwwolf 11-12-2011 11:21 AM

Quote:

Originally Posted by TurboTony84 (Post 1739448)
Im not posting on here to get bashed. Im on here for some good feedback. Telling me not to get one is not good feedback. To everyone else, thank you. I was checking out all the different options and what not on the jeep website. I'll go and take a look at the new 2012 wranglers some more, and I'll research a bit more before making the jump to buy one. it sounds as though the 3.6 is a pretty solid motor. I think its different to see that you can buy right hand drive wranglers as well. i'm sure you would have to order and wait for something like that, but it sounds like something the post office guys would use. and like i said before, this is just merely to point out some key differences between the 2 motors so n00bs like myself to the JK world can get some insight on this topic. I'm sure it has come up before, and will come up again...

Tony: I only gave you a couple of the more pertinent threads to the 3.8/3.6 debate. If you don't mind doing the work (some people do), you can find tons of info simply by using the forum's search field. Use the Advanced Search to limit your hits to the JK section, if you want. You'll notice that the rumor mill starts early in '11, and facts get filled in as you go later into the year, when people actually started bringing home the '12's.

Good luck!

TurboTony84 11-12-2011 11:29 AM

Quote:

Originally Posted by kbwwolf (Post 1739460)
Tony: I only gave you a couple of the more pertinent threads to the 3.8/3.6 debate. If you don't mind doing the work (some people do), you can find tons of info simply by using the forum's search field. Use the Advanced Search to limit your hits to the JK section, if you want. You'll notice that the rumor mill starts early in '11, and facts get filled in as you go later into the year, when people actually started bringing home the '12's.

Good luck!

Thats Awesome! Thanks a bunch! I'm finding all sorts of good stuff!

ranjr 11-12-2011 11:45 AM

You looking at an auto or manual trans? If auto get the 2012, the auto is a bigger improvement in my opinion.

joe002 11-12-2011 11:52 AM

Quote:

Originally Posted by TurboTony84 (Post 1739448)
Im not posting on here to get bashed...

Where's the bashing? You say you don't like the 3.8 so why would consider buying one? It doesn't make any sense to me? :confused:

cu in oz 11-12-2011 12:42 PM

Its not bashing......honestly just some humor. Ok.

I like the 3.8! I don't care for the 3.21's I have but I wanted ONLY a Sahara Tan Sport "S" and this is what it had in it. Game over for me.

Now IF I had a chance to order mine I would not have picked 3.21's, they do cut the performace......quite a bit. I do find its like having a 4spd with 2 o/d's. 6th is ONLY for flat crusing-no head wind. 5th is ok, 4th is fine for most of my driving. I don't do real "off=raod' so this works well for me and I do get reasonably nice milage.

Would I have liked to have the 3.6 YES!!!!! All day long. BUT, the 3.8 is a nice engine, mini-van motor and all. ALSO: I did NOT know of this fourm......had I, I might have waited......but it was the colour that grabed my heart.

TurboTony84 11-12-2011 02:26 PM

Quote:

Originally Posted by ranjr (Post 1739499)
You looking at an auto or manual trans? If auto get the 2012, the auto is a bigger improvement in my opinion.

Most likely a manual trans, but i may consider getting the auto.

Quote:

Originally Posted by joe002 (Post 1739510)
Where's the bashing? You say you don't like the 3.8 so why would consider buying one? It doesn't make any sense to me? :confused:

Point taken. Just considering all of my options

kbwwolf 11-12-2011 02:41 PM

I bought the manual, even though the '12 auto is supposed to be the bom. I prefer to manage my shift points myself...might've been a different story if I planned to rock crawl with my rig.

Lovin my manual so far. :D

ranjr 11-12-2011 02:56 PM

Quote:

Originally Posted by TurboTony84
Most likely a manual trans, but i may consider getting the auto.

Not as big of a difference with the manual. The 3.6 only makes the 80+ more HP where the 3.8 quits, above 5500 rpm. The 3.6 has small gains across the rest of the range.

theotis 11-12-2011 03:01 PM

As said before, the 4sp vs 5sp auto trans difference is larger than the engine difference. If you can get a really good deal ($4-6K savings) on 3.8 manual with 3.73 or 4.10 gears it could be something to consider. Remember resale will be less on a new '11 vs '12 since it is one model year older, so even if it was the same configuration you would want significant savings.

I currently have the 3.6 auto and really enjoy it. The engine is free revving and the oil change is easy. There is no data on long term usage since there is no data on a new engine.

MTH 11-12-2011 03:19 PM

This has been talked to death, though not for the past few weeks I suppose.

Aside from whatever complaints purists may have about added complexity, the 3.6 is pretty much a little better all around in the usable RPM range. Particularly with the new auto trans. That said, if you're willing to regear the diffs in the 3.8 you should be able to come reasonably close to the stock performance of the 3.6 in the sub-4k RPM range.

Given that 2011s and 2012s are within a few bucks of each other brand new, I'd go 2012 if I were buying today. But if I already had a 2011, I wouldn't trade in. In other words, all things being equal, I'd pay a little more for a 2012, but I wouldn't take a $5k+ trade-in hit. (I have a 2010, btw.)

Jeepin Dave 11-12-2011 05:07 PM

Have been following the development of the 3.6 for several years.

While the 3.8 is a great and proven engine, the 3.6 will be Chrysler, Dodge, and Jeep's standard going forward.

The 3.6 is a "clean sheet" design. It is lighter with better performance and easier to service which one would expect from a new clean sheet design.

The long term reliability of the 3.6 is unknown but it seems to have proven itself in the GC.

In the future, things like turbos are expected. Do not know if it is true, but have been told the 3.6 is ready for a bolt on turbo.

The 3.8 is a proven engine but it does not have all the latest advances. Having owned a 2008 JKRU with a 3.8, it was underpowered but thought it was because of the weight of the Rubi U and the fact that it was a brick. Changes in gearing might have helped but had immediate work for it to do.

Would avoid the 4-speed auto. The new 5-speed is so much better. :hide:

ovrthetop 11-12-2011 05:23 PM

I just got a 2012 JKU Sport Model with the 6spd , its great, couldnt be happier. :D

Black2012 11-12-2011 06:27 PM

Simple answer - 3.6 is more powerful, more efficient, and sounds better.

Edmunds Inside Line just track tested it at 7.1 seconds 0-60 which is a few seconds faster than the 3.8. Another review a while back had it at 6.8 seconds.

kbwwolf 11-12-2011 06:32 PM

Quote:

Originally Posted by Black2012 (Post 1740269)
Edmunds Inside Line just track tested it at 7.1 seconds 0-60 which is a few seconds faster than the 3.8. Another review a while back had it at 6.8 seconds.

Whew. Glad to know I could outrace a...what...Yugo? :D

rics1997 11-12-2011 07:01 PM

Quote:

Originally Posted by TurboTony84 (Post 1739352)
possibly looking to buy a JK wrangler. i know that the 3.8 is a minivan motor that replaced the 4.0 (a damn shame for the 4.0 was a great motor). from what i gather, 2012 came out with the new 3.6. what is the deal with the new 3.6? is that the same motor in the new grand cherokee? looking to get more info about it. performance, upgrades, reliability, etc. any info would be great. i had an 02 TJ. besides the crappy gas mileage, i absolutely loved it. i see alot of the newer wranglers, and there slowly growing on me, but im not really fond of the 3.8 v6...

The 3.8 wasn't just a minivan motor, it started in the New Yorker but since it was a very good motor at the time, they ended up using it in the Minivan. Being a good motor they used it in the minivan for years. Not to mention the 3.6L came out in the Minivan before the Wrangler also, so why not call it a minivan motor too?

As far as the 4.0, it was a good motor but not as versatile as the 3.8L not to mention the 3.8 had a few more hp then the 4.0. If the 4.0 was put in the heavy JKU it would have had the same issues the 3.8L did. The biggest issue with the 3.8 in the Wrangler was it wasn't matched correctly with its transmission to gears. If the manual would have came stock with 3.73 and the manual with 4.10 with the Rubi having 4.88 from stock, there would have been far less complaints.

Once you regear the 3.8L JKU, it is like driving a different vehicle.

jay-1 11-12-2011 07:25 PM

Im sorry i dont get it.I didnt buy my jeep to drag race it. 0 to 60 seriously the 3.8 is a proven engine thats why i bought a 2011 and and got a hell of a deal. i recalibrated it for the 35's. it runs great and will climb anything i point it at.

Black2012 11-12-2011 07:34 PM

Quote:

Originally Posted by jay-1 (Post 1740396)
Im sorry i dont get it.I didnt buy my jeep to drag race it. 0 to 60 seriously the 3.8 is a proven engine thats why i bought a 2011 and and got a hell of a deal. i recalibrated it for the 35's. it runs great and will climb anything i point it at.

0-60 is simply an indicator of ability to accelerate - not saying anyone here is drag racing. It is nice to be able to accelerate quickly when one wants to - on ramps, passing, etc. The 3.6 is significantly better at this.

Otherwise, both engines will get you from a to b and over whatever rock you want it to.

jay-1 11-12-2011 08:49 PM

I know what 0-60 is thanks. I just cant believe people bitch about it so much on a vehicle thats not designed for speed.My 3.8 gets on the interstate noproblem and ive never had a problem passing anyone i needed to. thats what im saying maybe you didnt get that out of my last post

kjeeper10 11-12-2011 09:00 PM

Quote:

Originally Posted by Black2012

0-60 is simply an indicator of ability to accelerate - not saying anyone here is drag racing. It is nice to be able to accelerate quickly when one wants to - on ramps, passing, etc. The 3.6 is significantly better at this.

Otherwise, both engines will get you from a to b and over whatever rock you want it to.

The one thing I don't understand is why people complain about merging or highway passing. Yes I do have a manual and not the auto but merging or passing I have no issues. From a dead stop first gear is very quick and shifting takes some time off also. 2 into 3rd is fine and away I go. My Jk is a lot better then my Tj was on the highway.
So 20-60 is fine. 0-20 could use some help
and from what I see the 3.6 is no better :popcorn:

rics1997 11-12-2011 09:10 PM

I have the Auto and even with the 3.73, I never had any problems getting up to speed, passing or highway problems. I got the 4.88 to tow my travel trailer and had no problems maintaining 60mph pulling it over West Virginia mountains.

JeffC 11-12-2011 09:13 PM

I debated between the '11 and '12 JKU. I ended up getting the '11.
As far as the engine performance goes...I just think my '11 is more sluggish due to all the extra money in savings I am hauling around :rofl: :hide:


All times are GMT -5. The time now is 07:01 AM.