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General Forums => The Mess Hall => Topic started by: JCAUDILL0034 on December 11, 2008, 03:36:59 PM

Title: motor swap
Post by: JCAUDILL0034 on December 11, 2008, 03:36:59 PM
ok i finally got me a motor for my 98 jeep ....the thing is its a 4.0 5 speed from a 97 cherekee....i got the whole jeep for 500 (be rolled) but what all else do i need that won't be on the jeep i got not....will my tranny crossmember work and also is my frame mounts different from 4 banger to the six??? i know i will need the wiring and ecm.....i've done previous swaps on s-10's and i feel like i can do it...also my cherekee has some sweet leather seats will they bolt to my frames??
Title: Re: motor swap
Post by: Jeffy on December 11, 2008, 04:17:10 PM
Radiator won't swap, frame mounts for the engine won't match.  You'll need a new dash cluster as well.  RPM's signal is different for the tach, IIRC.  Small stuff should interchange.  Evap should work...
Title: Re: motor swap
Post by: Bounty Hunter on December 11, 2008, 06:12:05 PM
http://www.dakotadigital.com/index.cfm/page/ptype=product/product_id=127/category_id=287/home_id=59/mode=prod/prd127.htm should allow you to use the 4cyl tach with the 6cyl engine, not bad for $80.
(http://www.dakotadigital.com/cartimages/prd_zm_127.jpg)
Title: Re: motor swap
Post by: JCAUDILL0034 on December 11, 2008, 07:08:35 PM
ok thanks where can i order a motor mount for my jeep will it have to be welded???will the tranny croxx member work???
Title: Re: motor swap
Post by: oldjeep on December 11, 2008, 07:34:03 PM
ok thanks where can i order a motor mount for my jeep will it have to be welded???will the tranny croxx member work???

The skidplate (trans crossmember) will work with the 4.0L.  For the frame mounts, you'll either need to order some from jeep or cut some off a wreck, not aware of any aftermarket pieces for a 2.5L to 4.0L swap.  Yes, the new frame mounts will need to be welded
Title: Re: motor swap
Post by: TahoeYJ on December 12, 2008, 10:37:23 AM
Don't forget lengthening the front driveshaft, shortening the rear, and a case or two of beer  :smokes:
Title: Re: motor swap
Post by: oldjeep on December 12, 2008, 10:46:29 AM
Don't forget lengthening the front driveshaft, shortening the rear, and a case or two of beer  :smokes:

Don't think so.  Isn't the reason for the massive shroud on the 4cyl fan because the trans and tcase are in a relatively standard location regardless of which motor they used?
Title: Re: motor swap
Post by: Jeffy on December 12, 2008, 11:17:29 AM
Don't think so.  Isn't the reason for the massive shroud on the 4cyl fan because the trans and tcase are in a relatively standard location regardless of which motor they used?

No, he's right.  The difference is in the transmissions.  They're slightly off.  The AX15 is the longest of the bunch followed by the Auto and the AX-5 being the shortest.  There were 3 different driveshafts used because of this.  IIRC, the difference between the shortest and the longest was around 5".

If it's lifted though, he might be able to get away with the stock shafts.
Title: Re: motor swap
Post by: Bounty Hunter on December 12, 2008, 12:08:57 PM
Jeffy is correct, while the tranny/transfer case are in relatively the same location, each driveline type has different length driveshafts.
Title: Re: motor swap
Post by: JCAUDILL0034 on December 12, 2008, 03:45:41 PM
i got a 3.5 lift on it and i am gonna try  it first and then see
Title: Re: motor swap
Post by: TahoeYJ on December 13, 2008, 11:26:57 AM
You might be able to get away with it if you've got the stock one, or you can probably find a someone with a stocker that they've gotten rid of for a SYE/cv driveshaft (If you don't already have one). If you need to change the length, the going rate it seems is about $100 average. I paid about that to have my used CV shaft legnthened and a neew u-joint too.