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Unread 11-15-2010, 02:50 PM   #1
Registered User
1988 YJ Wrangler 
Join Date: Nov 2010
Location: Noblesville, IN
Posts: 8
I need some advice!

Okay.....this is what I would like to do:

I have a 1988 Sahara that I have down to the frame & ready to put back together. It had the factory 4.2 with a TF999 3 speed auto transmission, NP 231 transfer case and about 130,000 miles.

Before I took it apart, it was having carb & head gasket issues and hesitated shifting from park to drive.

I also have a totaled 1996 Cherokee XJ with the 4.0 HO and AW4 auto transmission, but it is only a 2WD, and a 1994 YJ with the 2.5 and a 5 speed manual.....both run great with comperable miles.

I was hoping to use the newer 4.0 and AW4 transmission, but I don't think they will jive with my 231 transfer case.

In the end, I just want a reliable daily driver that will also push a little snow in the winter.

Any advice on how I should combine all of this stuff or any part I should stay away from would be very helpful!!!!!



Last edited by dmack3501; 11-15-2010 at 05:51 PM..
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Unread 11-15-2010, 03:38 PM   #2
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1995 YJ Wrangler 
Join Date: Oct 2008
Location: Grand Jct, CO
Posts: 2,963
I'd use the 4.0 with the NP321, I think the NP231 that comes with the 2.5 will have to be adapted to work with the 4.0 and it's tranny though.
1995 YJ 2.5 - 4 RC lift - 1" MML - 33's - flat fenders front - TJ flares rear -Raptor lined exterior - Herc'd interior - DIY front bumper & winch plate - 136 amp alternator mod - 4.0 TB swap

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I've got a shotgun, a rifle and a four wheel drive...
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cherokee , sahara , wrangler , xj , YJ
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