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1998 xj 350 swap

Old 09-15-2016, 07:18 AM
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Default 1998 xj 350 swap

hello all. I am really close to putting a 350 in my 98 xj with the 4.0 and a automatic AW-4 trans. im wanting to keep the trans if I can. are there any adaptors that go from a 350 gen 1 to a AW-4. also motor mounts. advanced adaptors maybe? couldn't really find much on there website for a AW-4 transmission. thanks guys
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Old 09-15-2016, 10:50 AM
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What I can tell you is that neither Novak or Advance make an AW4 adapter. Novak does, however, make an AX-15 adapter. Why do you want to keep the transmission so bad?
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Old 09-15-2016, 12:03 PM
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I don't necessarily need to keep it I was just looking for the quickest easiest way....if there is an easy way to put a 350 in a xj
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Old 09-15-2016, 12:44 PM
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Originally Posted by JesseFixesCATs View Post
I don't necessarily need to keep it I was just looking for the quickest easiest way....if there is an easy way to put a 350 in a xj
you will have to keep the trans that goes with the 350 and adapt the jeep transfer case to the chevy trans.
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Old 09-16-2016, 12:16 AM
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Chevy 4L60E or 700r4 mated to a Chevy NP231. Do some Google research. Lots of build threads out there.
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Old 09-16-2016, 01:25 AM
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Empty the 88-98 chevy truck np241 is stronger and a driver side drop and bolts right on a 4l60e.But i will give you a heads up unless its a mud bog jeep a carb and off road don't mix well.Its best to have efi even a throttle body injection is better off road.
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Old 09-16-2016, 01:38 PM
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Originally Posted by andrewmp6 View Post
Empty the 88-98 chevy truck np241 is stronger and a driver side drop and bolts right on a 4l60e.But i will give you a heads up unless its a mud bog jeep a carb and off road don't mix well.Its best to have efi even a throttle body injection is better off road.
Carbs aren't bad offroad if you have them setup right. I've had my Jeep at some crazy angles with no problems. I went from a bastardized 2se carb on the 2.8L to a Holley Truck Avenger on the 3.4L, which is designed out of the box for offroad use.
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Old 09-16-2016, 02:44 PM
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You can go propane or propane/carb hybrid. "Poor man's fuel injection".

See the can of worms you can open once you start modifying stuff.
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Old 09-16-2016, 02:51 PM
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I wouldn't want a 4L60E. those transmissions are complete garbage. Much better off with a 4L80 or even a turbo 400
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Old 09-16-2016, 08:41 PM
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Originally Posted by Jeepin'_Aint_EZ View Post
I wouldn't want a 4L60E. those transmissions are complete garbage. Much better off with a 4L80 or even a turbo 400
A stock rebuilt turbo 400 will pretty much be bullet proof up to 500 hp.. with a few hundred bucks more .. you can make it handle anything and everything you will ever throw at it.. you will twist axles before you destroy a turbo 400 that is built to handle it..
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Old 09-17-2016, 01:46 AM
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If its a off road toy a turbo 400 is best,If you need a overdrive the 4l60e can be built up to handle some insane power.A 4l80e won't fit the stock trans tunnel in the xj with out some cutting and beating.
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Old 09-17-2016, 01:49 AM
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Originally Posted by emptypockets View Post
Carbs aren't bad offroad if you have them setup right. I've had my Jeep at some crazy angles with no problems. I went from a bastardized 2se carb on the 2.8L to a Holley Truck Avenger on the 3.4L, which is designed out of the box for offroad use.
What cfm carb do you have tho ?Last holley truck carb i had problems with but was a mix of our crappy fuel and me having a beater truck and drove it like one.I did end up replacing it with a motorcraft i had laying around it and it ran better tell it threw a rod on me.
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