NP 231 J Rebuild and SYE install - Page 2 - JeepForum.com

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post #16 of 30 Old 05-09-2010, 08:25 PM
nj95yj
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please check the pics I would love yo use this write up to help rebuild my t case... thanks


One lovely blue 97' with 33's and 4 pissed off hamsters under the hood
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post #17 of 30 Old 05-09-2010, 10:01 PM Thread Starter
EZAces
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I will redo the picks tomarow did not know they got moved
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post #18 of 30 Old 05-11-2010, 08:58 PM Thread Starter
EZAces
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post #19 of 30 Old 01-27-2011, 03:23 PM
chaserYJ1990
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I guess this is as good a place as any that I can find in the FAQ's.

Has anyone replaced their "NP231 VACUUM 4WD SWITCH"? I'm going to be doing this this weekend and was wondering how difficult it's going to be. I'm guessing just unscrew the old one and screw the new one right in? Is there going to be any fluid loss from the NP231 when I take the old one off? I would think not...

Thanks in advance for any help, never messed with a transfer case, EVER! :-) should be fun!!!!
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post #20 of 30 Old 01-27-2011, 07:42 PM
The1AndOnlyBug
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Yeah you just unscrew the old one and put the new one on, no fluid loss. If you need one and can wait a few days I got one that I bought offline new for $10 you can have it for the cost of shipping (should be really cheap), depending on what store you go to depends on how much they cost, I got the one that's in the jeep at carquest for $16.

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'89 Wrangler 4.2 .....Sold......
'08 Grand Prix GXP 5.3 V8 303 hp 323 ft-lb tq, my baby =D ..... SOLD.......
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'94 Wrangler 4.0 K&N cold air, bored throttle body, head polished, Comp cam, 4.5" RE extreme duty, ubolt flip, 1" booms, 1" daystar body, M.O.R.E shock mount extenders rear, shock mount extenders on front, D35 W/ Richmond Lunchbox, 4.56 Gears, 35/12.5/15 Pro Comp M/T, Black D steelies, Front bumper W/ Stinger and winchplate (Armorology), Warn XD9000I, Dakota seats,Kenwood KDC-MP342U head unit, Soundbar with Kicker DS65's, Kicker DX200.4 Amp, Kenwood 6X9 on bottom of rollbar, Infinity 4X6's in dash, Tuffy Glovebox, 4 100W Daylighters, and a CJ hardtop.
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post #21 of 30 Old 01-28-2011, 07:49 AM
chaserYJ1990
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Thanks for the info and the offer, but I have already purchased the part and it should be here today. Thanks so much for your help!
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post #22 of 30 Old 06-01-2011, 06:59 PM
ZeroGravity
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Could this please be stickied? Wish I had this when I did my 231...

91 YJ
98 XJ
2 door love
The U.S. Army vaguely envisioned something bigger than a motorcycle, smaller than a truck, and undaunted by the most difficult terrain.
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post #23 of 30 Old 11-07-2011, 10:08 AM
Rockabilly
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My 93 YJ already had the SYE when I purchased it last year. Now the rear seal for the yoke is leaking. Is the seal the same as the factory seal? How can I find the part number if it is different?
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post #24 of 30 Old 11-18-2011, 06:45 PM
Duvalbulldog
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Can you do a switch with the electronic speed sensor. I bought a used ax15 and it came with the transfer case. My set up is a mechanical speedometer and I want to switch this part instead of tearing down the both to get the input shaft. If anyone could help that would be awesome thanks. I know it's friday.

The obvious is usually looked over when the worst is assumed
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post #25 of 30 Old 11-18-2011, 07:01 PM
raynmaker
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Nice writeup Aces.

Rockabilly the seals might be different. I found Napa to be the best place to check and if you take the old one they can match it. Might be worth the trouble of pulling the entire tailcone off and taking it with you incase no one has it you can put it together and drive it.

Duval the tailcones are the same for both mech and elec speedo. It is only the sender that is different. I am not sure about the gear that turns the speedo. they may be different. just have to look at the sensor gears and compare.

Warning: This poster has infinite knowledge of useless information and redneck tendencies. Use info at your own discretion. :wave:
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post #26 of 30 Old 11-18-2011, 08:24 PM
Duvalbulldog
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Quote:
Originally Posted by raynmaker View Post
Nice writeup Aces.

Rockabilly the seals might be different. I found Napa to be the best place to check and if you take the old one they can match it. Might be worth the trouble of pulling the entire tailcone off and taking it with you incase no one has it you can put it together and drive it.

Duval the tailcones are the same for both mech and elec speedo. It is only the sender that is different. I am not sure about the gear that turns the speedo. they may be different. just have to look at the sensor gears and compare.
Thanks raynmaker thought that it might be the same just had to remove and install but wanted to ask before started taking apart and needing extra parts. very excited about this swap ready to get that po ba out and get that ax in.

The obvious is usually looked over when the worst is assumed
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post #27 of 30 Old 11-21-2011, 08:21 PM
Rockabilly
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[QUOTE=raynmaker;12529873]Nice writeup Aces.

Rockabilly the seals might be different. I found Napa to be the best place to check and if you take the old one they can match it. Might be worth the trouble of pulling the entire tailcone off and taking it with you incase no one has it you can put it together and drive it.


Raynmaker: Thanks for the info. I ended up following a wheelin buddy's advice and cleaned the area real good to discover it was seeping through the splines of the yoke. A little bit of black RTV on the inside of the yoke and the leak is gone.
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post #28 of 30 Old 03-03-2013, 10:02 PM
cubsfan92
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i have a 1997 wrangler and need a new transfer case. will a 2003 liberty t-case fit on it? thanks
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post #29 of 30 Old 06-23-2016, 05:50 PM
bobjp
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What is the dimension to which you press the needle bearing into the planetary gear assembly. I know you said you used the "old shaft". Did you press to a stop?
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post #30 of 30 Old 06-23-2016, 06:28 PM
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....
Beach248 likes this.

Stop whining about the 'ride' - If your YJ ain't wrangling your soul free, then might I suggest you buy a stationwagon... at least you can fit all your bull**** in the back.
~YJOTM MAY '16~
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