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Unread 08-17-2011, 02:48 PM   #1
USMC3531
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1990 YJ Wrangler 
 
Join Date: Jul 2011
Location: Coshocton, OH
Posts: 57
Easiest swap to six over 2.5 "four angry squirrels"?

OK, I have the four angry squirrels in my 90YJ, TBI, stock 4.10 gears, 31 inch tires. I am getting tired of looking at Peterbuilt radiators in my rear view mirror on the highway.

What would be the easiest swap to a Jeep 6? I like the simplicity of the TBI over a carb and would like to keep it if possible. What about the ICM, clutch and bellhousing?

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Unread 08-17-2011, 03:44 PM   #2
Hghgrad
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1994 YJ Wrangler 
 
Join Date: Dec 2009
Location: Monroe, Mi
Posts: 386
I'm currently swapping my 94 2.5 over to a 95 4.0. So far, I've got $450 invested in the motor, trans, tc, wiring harness, rear driveshaft.

I just ordered new frame side motor mounts for $95...and I'm not really sure what else I'll be needing at the moment. For simplicity, I went with an ax15 so I wouldn't have to be concerned with wiring the aw4 controller.


I could have likely had it done in 3 solid days if I wasn't waiting on the mounts. Everything else went sooooo smooth until that.
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Unread 08-17-2011, 04:04 PM   #3
oldtime_ironman
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1991 YJ Wrangler 
 
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Location: 14304 Niagara Falls, NY
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I would look for an XJ Cherokee (the cherokee sport) in a junkyard. Get the whole motor, transmission, and transfer case. Probably also the wiring and ECU. Its almost identical to what they put in the 4.0 Wrangles anyway. But like highgrad says, the only new parts you *really* need is a new pair of engine mounts, because you'll have to cut the 2.5 mounts off the frame.
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Unread 08-17-2011, 04:05 PM   #4
dadstoy
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1995 YJ Wrangler 
 
Join Date: Dec 2005
Location: Livingston, Louisiana
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Do a search. Lots of write ups on 4.0 swaps.
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Unread 08-17-2011, 07:14 PM   #5
ridgeghost
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1990 YJ Wrangler 
 
Join Date: Jun 2011
Location: billings, montana
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i swapped my 2.5 to a 4.0. it was a 90 originally, and i have all of the wiring harness out of a 94 and my engine, transfer case and transmission are out of the 96 cherokee sport. i cut and rewelded moter mounts and trany mounts, and almost everything else went into place. i also snagged a set of 93 guages and those all bolted up and wired up as well. i still have the 4.10s out of the 90 so i have plenty of power!
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Unread 08-17-2011, 09:08 PM   #6
NonRubicon
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1990 YJ Wrangler 
 
Join Date: Nov 2009
Location: The southern armpit of California
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The 4.2L can be fitted with the Howell TBI kit or the junkyard equivalent from a 4.3L V6. The 4.0L ('91 and newer) will have MPFI.

The Howell kit for the 4.2L comes with everything you need, including the ECM programmed for the 4.2L. It will set you back over 1000 clams though.
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Unread 08-19-2011, 04:39 AM   #7
SLADE
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2004 TJ Wrangler 
 
Join Date: Jul 2010
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Quote:
Originally Posted by USMC3531 View Post
What would be the easiest swap to a Jeep 6?

Sell the 4cyl Jeep and buy one with a 6cyl allready in it.
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