NP242 in a JK?
06-14-2013, 05:34 AM
#21
JK Super Freak
Guys,
has anyone actually tried to swap the jk transfer case for the 242 (or 242hd)? I was told ther isn't enough room to fit the box in the jk. I am seriously considering a JK instead of my old Wj but the lack of 4HI got me worried. The european JK with the diesel engine and auto box has a very uneaven torque output and the back wheels keep on spinning any time you step harder on the throttle. I can't imagine any winter situations with the current transfer case. On the other hand both the 242 and my Wj quadradrive box work just fine when things get slippery so my question is really can you have any of them in a JK Unlimited?
has anyone actually tried to swap the jk transfer case for the 242 (or 242hd)? I was told ther isn't enough room to fit the box in the jk. I am seriously considering a JK instead of my old Wj but the lack of 4HI got me worried. The european JK with the diesel engine and auto box has a very uneaven torque output and the back wheels keep on spinning any time you step harder on the throttle. I can't imagine any winter situations with the current transfer case. On the other hand both the 242 and my Wj quadradrive box work just fine when things get slippery so my question is really can you have any of them in a JK Unlimited?
07-19-2013, 01:04 PM
#22
JK Enthusiast
Guys,
has anyone actually tried to swap the jk transfer case for the 242 (or 242hd)? I was told ther isn't enough room to fit the box in the jk. I am seriously considering a JK instead of my old Wj but the lack of 4HI got me worried. The european JK with the diesel engine and auto box has a very uneaven torque output and the back wheels keep on spinning any time you step harder on the throttle. I can't imagine any winter situations with the current transfer case. On the other hand both the 242 and my Wj quadradrive box work just fine when things get slippery so my question is really can you have any of them in a JK Unlimited?
has anyone actually tried to swap the jk transfer case for the 242 (or 242hd)? I was told ther isn't enough room to fit the box in the jk. I am seriously considering a JK instead of my old Wj but the lack of 4HI got me worried. The european JK with the diesel engine and auto box has a very uneaven torque output and the back wheels keep on spinning any time you step harder on the throttle. I can't imagine any winter situations with the current transfer case. On the other hand both the 242 and my Wj quadradrive box work just fine when things get slippery so my question is really can you have any of them in a JK Unlimited?
Last edited by tomharley; 07-19-2013 at 01:07 PM.
07-19-2013, 01:58 PM
#24
JK Enthusiast
It will not be easy to describe. My English is not so good. And this is a little more complicated theme in my own language.And,only five photos per post.
The main problem is of length,. NP242 is too long, and has a slip yoke instead fixed yoke ,if you want to use stock drive shafts. No one manufactured SYE kit with short shaft.
I have long thought up that model NP242 use. Finally it became the best NP242J from KJ Liberty. It has the same input shaft, same length. It has 32 teeth front and rear outputs and the same position switch. It is important for the proper function of the ESP.
First:
shorten the main shaft. Spline length -1,25" (32mm),drill and tap thread 3/8 or 10mm.
Then make washer and weld it to the inside of yoke.
The main problem is of length,. NP242 is too long, and has a slip yoke instead fixed yoke ,if you want to use stock drive shafts. No one manufactured SYE kit with short shaft.
I have long thought up that model NP242 use. Finally it became the best NP242J from KJ Liberty. It has the same input shaft, same length. It has 32 teeth front and rear outputs and the same position switch. It is important for the proper function of the ESP.
First:
shorten the main shaft. Spline length -1,25" (32mm),drill and tap thread 3/8 or 10mm.
Then make washer and weld it to the inside of yoke.
07-19-2013, 02:21 PM
#25
JK Enthusiast
second:
modification of range selector
The position switch is the same. Five positions. NP241 only skips the position of Full Time.
The value in position Full Time in the Selec Trac,JK's electronics does not know. It is necessary to weld on a little a bit material on the third surface of range selector. The switch must be in this position to give the same value as in the 2WD position.
stock 242
Modified
2WD
Part Time
Full Time
Neutral
0,21
Lo Range
0,06
modification of range selector
The position switch is the same. Five positions. NP241 only skips the position of Full Time.
The value in position Full Time in the Selec Trac,JK's electronics does not know. It is necessary to weld on a little a bit material on the third surface of range selector. The switch must be in this position to give the same value as in the 2WD position.
stock 242
Modified
2WD
Part Time
Full Time
Neutral
0,21
Lo Range
0,06
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Travis Patton (12-26-2020)
07-19-2013, 02:32 PM
#26
JK Enthusiast
Last, but still not resolved. It is necessary to rotate the direction of the shifting. Everything works, only the lever is backwards in 2WD and shifting is forward.
07-19-2013, 02:45 PM
#27
JK Enthusiast
Even after this modification, the new t-case is longer than Command Trac. It's not a problem for JK Unlimited but I do not know how the 2dr.
241 - 14,56" (370mm)
242 - 17,70" (450mm)
241 - 14,56" (370mm)
242 - 17,70" (450mm)
07-19-2013, 02:58 PM
#28
JK Junkie
Join Date: Feb 2013
Location: West Richland Washington
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What tcase they using in new grand? Get that its awd and they put behind hemi so should be strong enough (unless differ for hemj) but none the less grand has same engine and tranny and I've seen em wheel them through moab and the rubicon
07-19-2013, 03:02 PM
#29
JK Enthusiast
Here's a nice overview
Jeep Transfer Case Rebuilt Quality Factory Transfer Cases, Save Money! - Drivetrain.com
Jeep Transfer Case Rebuilt Quality Factory Transfer Cases, Save Money! - Drivetrain.com
07-19-2013, 06:31 PM
#30
JK Enthusiast
Join Date: Oct 2010
Location: Windsor, ON
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Thanks for write up! You basically had to make your own slip yoke eliminator.
I dunno how well the extra length would work in my 2dr :(
Either way, bookmarked for when the warranty runs out lol
I dunno how well the extra length would work in my 2dr :(
Either way, bookmarked for when the warranty runs out lol