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post #1051 of Old 02-08-2012, 06:22 AM
csouers
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1999 XJ Cherokee 
 
Join Date: Feb 2008
Location: Bloomington
Posts: 2,031
My 242 ESY swap on my stock 5.9 required rear dshaft work. We took an inch off.


1998 Bright Platinum ZJ 5.9 Limited - 5.9l, 46RE, NV-242, D30/44a (Trac-Loc) w/3.73s - The DD
1999 White XJ Sport - 4.0l, AW4, NP-231, D30/8.25 w/3.55s - The Rig

My Photography
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post #1052 of Old 02-08-2012, 09:23 AM
2GPS4ME
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1998 TJ Wrangler 
 
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Location: 44.1N, 103.2W
Posts: 857
This is why I chose to go with the 231. The measurements are identical.

But the 242 is a nice TC, though....


WJ (WIFE JEEP) PROJECT COMING SOON
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post #1053 of Old 02-26-2012, 01:41 PM
elkski
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1993 ZJ 
 
Join Date: Feb 2012
Location: Sandy
Posts: 65
Before I read all 71 pages of this.. Why does one want to change out TC's?? I have a 93 GC 5.2
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post #1054 of Old 02-26-2012, 01:46 PM
KingtheZJ
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1998 ZJ 
 
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Location: Rochester NY
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Quote:
Originally Posted by elkski View Post
Before I read all 71 pages of this.. Why does one want to change out TC's?? I have a 93 GC 5.2
blown viscous coupling in a 249 causing binding on turns. 242s and 231s are abundant and cheap
or, the ability to run a front automatic locker on pavement. or smoother operation having a rear automatic locker.

'88 XJ
'98 ZJ on 37s and tons
'02 Chevy 2500HD 8.1
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post #1055 of Old 02-26-2012, 02:00 PM
cttandy
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1998 ZJ 
 
Join Date: Mar 2010
Location: Springfield, TN
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Quote:
Originally Posted by KingtheZJ View Post
blown viscous coupling in a 249 causing binding on turns. 242s and 231s are abundant and cheap
or, the ability to run a front automatic locker on pavement. or smoother operation having a rear automatic locker.
Don't forget improved fuel mileage, stronger components, the ability to do 2wd burnouts, better traction offroad.


So to summarize


BETTER, BETTER, BETTER, BETTER, BETTER, BETTER, BETTER

SOLD - 1998 Jeep Grand Cherokee 5.9 Limited - stock 120,000 miles, NP242 conversion,1999 Jeep Grand Cherokee 4.0L Limited 4x4- Stock, 1999 Jeep Cherokee 4.0L 4x2 - Stock, 1987 Jeep Cherokee 4.0L 4x4 - Stock, 1987 Jeep Grand Wagoneer 4x4 - From from stock, far to much to list here
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post #1056 of Old 02-26-2012, 02:06 PM
KingtheZJ
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1998 ZJ 
 
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Quote:
Originally Posted by cttandy View Post
Don't forget improved fuel mileage
any reports of increased mileage are negligible. front axle still spins w/o lockout hubs. no overall increase
Quote:
Originally Posted by cttandy View Post
stronger components
the 249 has the highest torque rating
Quote:
Originally Posted by cttandy View Post
the ability to do 2wd burnouts
i'll agree with this!

'88 XJ
'98 ZJ on 37s and tons
'02 Chevy 2500HD 8.1
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post #1057 of Old 02-26-2012, 02:09 PM
cttandy
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1998 ZJ 
 
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Quote:
Originally Posted by KingtheZJ View Post
any reports of increased mileage are negligible. front axle still spins w/o lockout hubs. no overall increase
I wouldn't call jumping from 13.5MPG to 18.5MPG negligible. I tried everything I could before swapping the TC. The results were worth the effort.

Granted, there was probably a lot more problems under the surface.

SOLD - 1998 Jeep Grand Cherokee 5.9 Limited - stock 120,000 miles, NP242 conversion,1999 Jeep Grand Cherokee 4.0L Limited 4x4- Stock, 1999 Jeep Cherokee 4.0L 4x2 - Stock, 1987 Jeep Cherokee 4.0L 4x4 - Stock, 1987 Jeep Grand Wagoneer 4x4 - From from stock, far to much to list here
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post #1058 of Old 02-26-2012, 03:26 PM
E-rok
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1996 ZJ 
 
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Quote:
Originally Posted by cttandy View Post
I wouldn't call jumping from 13.5MPG to 18.5MPG negligible. I tried everything I could before swapping the TC. The results were worth the effort.

Granted, there was probably a lot more problems under the surface.
I swapped in a 242 and run 2WD for the most part and found no noticeable gain in MPG.

unless you have disco hubs, its not going to make much diff.

2011 WK2 Laredo X Hemi
2013 Ram 2500 Cummins
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post #1059 of Old 02-26-2012, 03:29 PM
KingtheZJ
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1998 ZJ 
 
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Location: Rochester NY
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Quote:
Originally Posted by cttandy View Post
I wouldn't call jumping from 13.5MPG to 18.5MPG negligible. I tried everything I could before swapping the TC. The results were worth the effort.

Granted, there was probably a lot more problems under the surface.
i had 0 gain from the swap. you definitely had something else going on.

'88 XJ
'98 ZJ on 37s and tons
'02 Chevy 2500HD 8.1
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post #1060 of Old 02-26-2012, 04:13 PM
Dyn0mitemat
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1998 ZJ 
 
Join Date: Dec 2010
Location: BC
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x2 i didn't gain any mpg at all doing my swap

Actually lost a bit because i'm skinny pedal happy now drifting it around corners

09 Rubi 2dr:MetalCloak2.5", 37"MTZ's/Slabs, EVO Stff, ORFab Cage, Chromo's, Driveshafts etc
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post #1061 of Old 02-26-2012, 06:10 PM
cttandy
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1998 ZJ 
 
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Location: Springfield, TN
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Before the swap, when I took my foot off the gas to coast, the jeep would just start stopping. Afterwards, it would coast great, even if I put it in full time 4wd it would still coast.

By the end, the 249 was only putting power to the front wheels. Made for some pretty awesome front wheel drive burnout's though.

SOLD - 1998 Jeep Grand Cherokee 5.9 Limited - stock 120,000 miles, NP242 conversion,1999 Jeep Grand Cherokee 4.0L Limited 4x4- Stock, 1999 Jeep Cherokee 4.0L 4x2 - Stock, 1987 Jeep Cherokee 4.0L 4x4 - Stock, 1987 Jeep Grand Wagoneer 4x4 - From from stock, far to much to list here
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post #1062 of Old 02-26-2012, 06:13 PM
comptiger5000
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1998 ZJ 
 
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Posts: 4,556
Then your 249 was screwed far worse than a bad VC, or your tires weren't matched front to rear (or the pressures were noticeably different).
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post #1063 of Old 02-26-2012, 07:49 PM
moldeck
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1996  
 
Join Date: Feb 2012
Location: tecumseh
Posts: 122
OK im in the middle of the input shaft change. I turned the gear in the big fork around a couple times... not sure which way is toward the tail shaft. I am guessing that the thinner side goes toward the tail shaft. Can someone confirm this?
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post #1064 of Old 02-26-2012, 08:08 PM
Dyn0mitemat
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1998 ZJ 
 
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Location: BC
Posts: 1,307
Your description left me clueless as to what your talking about, get a picture of what parts your talking about

There's not much in the cases that can be installed backwards, most likely if you can bolt it all together and run the shifter through the modes and everythings turning like it should you probably won't have a problem

09 Rubi 2dr:MetalCloak2.5", 37"MTZ's/Slabs, EVO Stff, ORFab Cage, Chromo's, Driveshafts etc
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post #1065 of Old 02-26-2012, 08:43 PM Thread Starter
JrMechanic
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1993 ZJ 
 
Join Date: Oct 2008
Location: Lima, Ohio
Posts: 3,370
Quote:
Originally Posted by moldeck View Post
OK im in the middle of the input shaft change. I turned the gear in the big fork around a couple times... not sure which way is toward the tail shaft. I am guessing that the thinner side goes toward the tail shaft. Can someone confirm this?
The low range (lower of the two forks) hub goes with taller portion facing down into the input assembly. The hub should be pretty much level with the fork once installed.

The mode sleeve goes with the taller portion and teeth facing up towards the rear of the case.

Want to swap an NP242 or NP231 into your ZJ? Here's how:
http://www.jeepforum.com/forum/f13/n...pdated-685644/
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