2.4l to 3.7l. need...more...powaaaaa

EUniqe · **Posted:** Sun Nov 22, 2009 7:22 pm

hey everyone, new to the forum.

i'm in australia, and there is no such thing as the liberty 3.7v6 with a manual transmission over here (only comes in auto)

now from what i understand, it is possible to buy the 2005 liberty with the 3.7v6 + ecu etc. with the manual (NVG NV3500/NV1500) in america??

if this is the case then what i'm considering is:

i have a 4x4 liberty 2.4. and it's got less power than your microwave. seriously, i can't get up any sort of incline at anything above 50mph.

so, what i was thinking of doing, is buying a 3.7v6 from the wreckers (as they come in auto form only over here - and i cannoottt have an auto) and having one of the 5-speed manual boxes shipped from america over here, as i have the 6 speed (NSG370) which i doubt will be a straight bolt on, and i want to do the least amount of modifications as possible. i'm also assumuming that the 4wd system and drivelines are identical to those on the 3.7, as i doubt jeep made a whole new one to suit the 2.4 in a year's time :S.

after i have the engine and box i assume it would be a straight bolt up to the stock engine mounts, fuel line locations etc. as i've heard that the 2.4 and v6 have identical engine mounts?? i understand that my key fob will have to be reprogrammed into the ecu to be able to start the car amongst other things.

i was looking for some clarification on these subjects, and any help would be greatly appreciated. i would love some more power, and i love my KJ but i can't spend thousands on a super/turbocharger setup.

cheers

Diggerfreek · **Posted:** Sun Nov 22, 2009 7:39 pm

The 6 speed should bolt straight up. I don't remember what year it started, but the 6 speed was standard with the 3.7 till the end of the 08 model year.....

EUniqe · **Posted:** Sun Nov 22, 2009 8:23 pm

ohh really?? thanks mate that's extremely useful information

Fulltimer · **Posted:** Sun Nov 22, 2009 8:27 pm

One good thing is that you already have the 4.10's in place! You will see a nice difference. BTW, welcome to the group!!

Terry

PS: Pics needed or it didn't happen!

Diggerfreek · **Posted:** Sun Nov 22, 2009 8:30 pm

ok, just did a little research.... for 05 to 08, the NSG 370 (6 speed) was used

EUniqe · **Posted:** Sun Nov 22, 2009 8:35 pm

okay that would sound about right. thanks dude, that could have saved me a whole lot of money.

haha cheers Fulltimer. lol you'll bet there will be a difference - almost double the torque

. hehe it hasn't happened yet

but if i get around to doing it, the build pics wil be going up on this site

CRD Joe · **Posted:** Mon Nov 23, 2009 4:26 pm

Bugger. Put a CRD in her.

InCommando · **Posted:** Mon Nov 23, 2009 6:50 pm

It may be easier to research a supercharger for your current engine. I am pretty sure it is the same 2.4 the Wranglers use.

If you haven't found it yet, go to the Downunder section. Several of the Aussies members are extremely helpful and knowledgeable.

ls6jay · **Posted:** Mon Nov 23, 2009 11:58 pm

good idea, it can be done. me and a friend put an ls1 6 speed in a notchback mustang about 8 years ago. :twisted:

cmohr · **Posted:** Tue Nov 24, 2009 12:58 am

Mean, I'm currently looking into this myself, as my auto is toast..

Anyone there in the States know where I can get a manual box, , bell housing, clutch flywheel, and ECU for a 2004 3.7 V6????

And a question for the lads that do have the V6 manuals, what transfer case do you have???? Do you have parttime and fulltime H4??? As thats what I have in the auto, can I use the same tranfer case with the manual Box..

As well, being the 04 model, does that mean I go with a 5 speed.???

Serious Sam on this..

InCommando · **Posted:** Tue Nov 24, 2009 12:43 pm

I can't help with most of your questions, but the 3.7's with the nsg370 6-speed have the 241j part-time transfer case, which is a heavier duty unit than the 231j. I am pretty sure that these two are interchangeable. I am not sure if the 242j full-time unit is a bolt-on to the 6spd.

2006 KJ · **Posted:** Tue Nov 24, 2009 1:20 pm

my 6 speed and 3.7 would be a absolute monster with 4.10's.. i bet you could burn tire through 3 or 4 gears

when mine was stock with 3.55s it would chrip the tires going into 3rd

cmohr · **Posted:** Tue Nov 24, 2009 5:37 pm

Yes, I have always thought that a Manual v6 would be very very good, it seems that all the torque control and crap auto programming in the v6 auto that is the problem, not the actual gearbox and engine, its just that it is limited so much by the programming.

Will be looking further into this. I am currently having way too many issues with the auto, I have been looking at going to a CRD manual, but, only an older 2.5lt model, 5 speed, rear drum brakes, no cruise control. But I have already done so much to mine, I would hate to have to start from the beginning on another one, If I can possibly switch mine to a manual, I'd be very happy.

What will be will be.

FreedomKJ · **Posted:** Tue Nov 24, 2009 9:44 pm

Be careful mating the NV242 up to a manual tranny.

I can't recall the exact details, but I remember several years ago that guys with the XJs were having issues doing that.

tjkj2002 · **Posted:** Tue Nov 24, 2009 9:53 pm

Yep it's a no-go for a select trac and manual trans combo,you will have lot's of issues.

As far as a 2.4 to 3.7 swap there will be alot of parts that need to replaced.You will need a new cradle since the 3.7 uses a different cradle than the 2.4.Also you will need different front diff mounts since the 2.4(like the CRD) moves the front diff closer to the drivers side for oil pan clearance.Then you will need new front CV's,both sides.Then the engine,all the wiring,PCM,TCM,and prepare to drop alot of money and time at a dealership for programming.In all it will be cheaper/easier to just trade in your 2.4 and get a 3.7 or a CRD.

cmohr · **Posted:** Wed Nov 25, 2009 6:48 pm

Yes, looked at a CRD, but thats money too. and i must admit, as much as I get frustrated with my Jeep, I still love the bugger and am trying everything I can to keep it.

I actually have the V6 but with that rle auto. A manual would be sweet, and I'm thinking possible, but the logistics of getting the parts seems to be too hard.

I'm going to see if I can find a better auto transmission mob to go to , rather than going back to the dealership again.

And I'm having a test drive of a 2002 CRD manual on Saturday..

cmohr · **Posted:** Thu Dec 03, 2009 10:41 pm

I figured out how to get a 5 speed maual into my KJ.... Change KJ's. :lol:

I just bought a 2002 2.5 5 speed manual.... Problem solved.. :wink:

JeepinJarhead03 · **Posted:** Sun Dec 06, 2009 6:33 am

stick a saab turbo on it and press the skinny pedal through the floor mat

good to hear you 'resolved' your problem though

2.4l to 3.7l. need...more...powaaaaa

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