need help in va with xj

U

ugly87xj

NAXJA Forum User

Location

virginia

• May 18, 2006

• #1

i have an 87 xj with the 2.5 4cyl with an auto behind it. my question is how much trouble would it be to put a 4.0l? would the tranny bolt up or do i need a tranny from a 4.0. lastly the reason for motor swap is i think i wiped out an exhaust lobe on the cam, it idles rough and compression is no.2-125 no.3-110 and no.4-75. the motor has 157,000 on it.should i just rebiuld or swap?

 

goodburbon

NAXJA Forum User

Location

Westcliffe Colorado.

• May 18, 2006

• #2

you'd have to get the tranny too, and tranny controller, and computer, and..........

 

53guy

NAXJA Forum User

Location

EnTransit

• May 18, 2006

• #3

Good luck finding good used xj parts around here for cheap. The junk yards suck and the ones that do have xj's in them are expensive. Anyways, I'd say just rebuild the motor. Its not worth the hassle of swapping everything in my opinion.

 

ILLXJ

NAXJA Member

NAXJA Member

Location

Louisville, IL

• May 18, 2006

• #4

The 2.5l may have the AW4 behind it. My 89 parts jeep had this combo. Might just need a 4.0 bell housing & TC, I don't know. Good luck. JIM.

 

cal

NAXJA Forum User

NAXJA Member

Location

Hammertown, USA

• May 18, 2006

• #5

you will need enough parts from teh donor jeep that you should probably just buy a cherokee with a 4.0 and move your upgrades over..

 

F

fryed_1

NAXJA Forum User

Location

Fredericksburg, VA

• May 19, 2006

• #6

I have an 88 4L engine, AW4 and 231 near richmond.

 

53guy

NAXJA Forum User

Location

EnTransit

• May 19, 2006

• #7

I have an 87 cherokee if you want it for $200. Its been rolled and has been sitting in a field for about a year.

 

J

JeepCherokee25

NAXJA Forum User

Location

Canada

• May 20, 2006

• #8

Hey,
I have a 1990 Jeep Cherokee 4.0 with an Aw4 tranny in it. I"m thinkin about droppping either a 350 or a 340 into it. What transmissions would fit under my rig without changing drivelines. the aw4 really isnt strong enough to add like 200 more hp. They make conversion kits but those are junk.

 

R

RandyD71

NAXJA Forum User

Location

Telford, PA

• May 20, 2006

• #9

The best way to go about doing a 4.0 swap would be to have an entire donor vehicle with all drivline parts available. You will definitely need the engine harness & computer, the transmission with its harness & computer, probably gonna want the fuel tank and pump also. Also remember that there is more than one vesion of the 4.0. The versions that I know of are 87-90,91,92-93,94-98,99 & up. From 91 on they are the high output models. With all of the work involved I would also be of the opinion that it would probably be easier and more economical in the long run to get a decent running 4.0 and switching over your mods. Or you may even be able to score a fairly low mile used 2.5 for under $400 from a yard as apparently nobody wants them and the are not in high demand. Best of luck which ever way you decide to go.