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NP242J T case question 
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Joined: Tue Sep 06, 2016 6:59 pm
Posts: 122
Location: Aldergrove B.C.
Post NP242J T case question
I have my new axles in and went for a test at Stave today. Climbing up some loose dirt in 2 HI it is apparent that the rear Variloc is functioning perfectly both rear wheels spin in the dirt.

So roll back and shift into 4 full time (open ctr diff) and approach dirt pile again. Climbs well until the torque biases to the rear and spins both rear wheels. Sounds correct so far.
Roll back and shift into 4 part time (locked ctr diff) and approach hill. Surprisingly same result, torque bias to rear. Now, 252j case has a spring loaded select fork so I figured it may not have engaged the locked mode. My thought is to back down to the road and put it in 4Lo and drive back and forth a little with no load. There should be no way that the ctr diff can be open in 4 Lo, right?

Well same result in 4 Lo torque bias to rear. It has a funny symptom too, it will climb until there is a loss of traction, followed by a dull clunk and then torque bias to rear. Like popping out of gear.

So I don't think its the axles and I do remember being on a snow run this winter and having issues with the torque biasing to the rear in 4 Hi (part time) with my old axles. Anyone know how the mode select in the 242 case works and what could be up?

_________________
2002 WJ Laredo 4.0L
4" long arm
32" BFG MT T/A KM

2013 Ford Raptor SVT 6.2L Super Crew
35" General Grabbers

VA7 RTR


Sun Jun 17, 2018 8:45 pm
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Joined: Thu Apr 24, 2008 5:23 pm
Posts: 550
Post Re: NP242J T case question
Very odd. I always thought the 242 just had a center differential in it. Information from advance adapters claims 48/52 torque bossing but looking at the exploded views I don't see why it would bias either way, but it's also a minimal amount.

Regardless, in part time mode output should be equal front to rear.

Ill try to make copies of the exploded view.


Sun Jun 17, 2018 11:42 pm
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Joined: Thu Apr 24, 2008 5:23 pm
Posts: 550
Post Re: NP242J T case question
Simpler is just to find one online https://images.google.ca/imgres?imgurl= ... h%2Fx%2Fim

Maybe, just maybe the shift collar isn't moving far enough to lock out the center diff


Sun Jun 17, 2018 11:46 pm
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Joined: Tue Sep 06, 2016 6:59 pm
Posts: 122
Location: Aldergrove B.C.
Post Re: NP242J T case question
Think you are right there. Could be a cable adjustment or apparently the shift forks have plastic sliders that can become worn or dislodged. That would make sense why the low range would work but would not shift securely into locked diff. 2 separate forks.

Lame :(

_________________
2002 WJ Laredo 4.0L
4" long arm
32" BFG MT T/A KM

2013 Ford Raptor SVT 6.2L Super Crew
35" General Grabbers

VA7 RTR


Mon Jun 18, 2018 8:26 am
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Joined: Tue Sep 06, 2016 6:59 pm
Posts: 122
Location: Aldergrove B.C.
Post Re: NP242J T case question
I wonder if the shift cable needs a minor adjustment after the TCase drop.

_________________
2002 WJ Laredo 4.0L
4" long arm
32" BFG MT T/A KM

2013 Ford Raptor SVT 6.2L Super Crew
35" General Grabbers

VA7 RTR


Mon Jun 18, 2018 12:52 pm
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Joined: Tue Sep 06, 2016 6:59 pm
Posts: 122
Location: Aldergrove B.C.
Post Re: NP242J T case question
Fixed, got a 242J T Case from Pick a Part for $109. It’s reliably 4wD again.

_________________
2002 WJ Laredo 4.0L
4" long arm
32" BFG MT T/A KM

2013 Ford Raptor SVT 6.2L Super Crew
35" General Grabbers

VA7 RTR


Sat Aug 18, 2018 11:31 pm
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