Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: shirleythesquid on April 07, 2014, 09:22:58 PM

Title: xj 2.5 petrol swap to 4.0
Post by: shirleythesquid on April 07, 2014, 09:22:58 PM

Right so I currently have a 2.5 petrol xj 98, I find it a little under powered however I prefer the manual gearbox for offroad. Now I have been thinking would it be possible (and how simple would it be) to put a 4.0 in the vehicle onto the manual gearbox. Would the gear box handle the power?  Would the engine fit directly onto the gear box?

Any advice would be appreciated.

Title: Re: xj 2.5 petrol swap to 4.0
Post by: Dave69 on April 07, 2014, 09:50:41 PM

its not a simple swap if thats what your hoping,

search online will be the best source of information, stateside forums should be able to offer more information

Title: Re: xj 2.5 petrol swap to 4.0
Post by: dtooth on April 07, 2014, 09:53:03 PM

Easier to put manual box in an auto 4.0l than a 4.0l in a 2.5 cherry.

Ax15 manual box came with 4.0 on wranglers and import jeeps.

Flywheel, clutch ,pedals ,propshafts and electrical fettling needed (nss)

Title: Re: xj 2.5 petrol swap to 4.0
Post by: j33pky on April 08, 2014, 06:34:18 AM

And diesels

Title: Re: xj 2.5 petrol swap to 4.0
Post by: The Smiths on April 08, 2014, 10:08:20 AM

Quote from: j33pky on April 08, 2014, 06:34:18 AM

And diesels

somebody has to use the dirty word - you will set everyone off agan :violence: :violence:

Title: Re: xj 2.5 petrol swap to 4.0
Post by: Dave69 on April 08, 2014, 07:54:58 PM

awww come on diesels are great, good power loads of torque



except when it's a VM lump but there again if you get the 3ltr from the schmitt road sweeper then that should be a better unit.

Title: Re: xj 2.5 petrol swap to 4.0
Post by: Mike Pavelin on April 09, 2014, 06:22:22 PM

The easiest way is to sell the 2.5, buy a 4.0. Then buy a 2.5 diesel with a f**ked engine, use the gearbox, stick, pedal assembly and clutch hydraulics. Also use the 3.73 axles off the diesel which gives perfect gearing on 31"tyres with a manual box. You can then choose either the 242 transfer box off the 4.0 or the 231 from the diesel. You may have juggle propshafts depending on what lift you are running, and you will need a 4.0 manual TJ or XJ clutch and flywheel. Don't forget to install a pilot bearing in the end of the crankshaft as well. Manual 4.0 XJs rock by the way :003:

Title: Re: xj 2.5 petrol swap to 4.0
Post by: Dave69 on April 09, 2014, 07:34:17 PM

manual 4ltr = power slides on tap

Title: Re: xj 2.5 petrol swap to 4.0
Post by: wildwood on April 09, 2014, 07:58:46 PM

Weird old world ain't it ???

Tis now cheaper to put together an ass kicking XJ or even ZJ with the purchase of a few broken donors than it is to search out that TJ you think you want.........???

I think a 1 Ton ZJ with lots of chassis stiffening and cage and either removable doors or cut down doors is the way forward........ It's got the wheelbase we all crave.........


Argue and debate at will...............

I'll be back after dinner :icon_biggrin:

Title: Re: xj 2.5 petrol swap to 4.0
Post by: bigjeepzj on April 09, 2014, 08:20:48 PM

told you ZJ's are the way forwards

Title: Re: xj 2.5 petrol swap to 4.0
Post by: jay140285 on April 09, 2014, 08:47:00 PM

Hell yea


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