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11-25-2008, 08:35 AM
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#1
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Registered User
Join Date: Mar 2007
Location: Indiana
Posts: 345
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NP231 Popping out of Gear
When engaged in 4High, my T-Case will pop out and go back to 2W. I used 4Low and it didn't pop out.
Is this an easy fix, or are gears not meshing right? Anyone else have this problem? I tried the search, but didn't find what I was looking for.
I should mention I have 4.0L, NP231 w/ SYE.....don't know if that makes a diff.
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96 Cherokee Sport w/ 4.0L, AW4, NP231, 4" Rough Country Lift, 31" BFG AT's
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11-25-2008, 02:34 PM
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#2
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Don't poke the bear
Join Date: Jul 2007
Location: Stuart, Florida
Posts: 12,971
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The gears may indeed be failing to mesh properly. The question becomes, "Why?"
It is possible that your shift pads are worn out/missing on the shifter forks, or the forks may be damaged/bent.
Here is a link to the replacement pads.
http://www.quadratec.com/products/52219_01.htm
Last edited by Mean Max; 11-25-2008 at 03:17 PM..
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11-25-2008, 02:45 PM
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#3
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Registered User
Join Date: May 2005
Location: Colchester, VT
Posts: 941
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stop driving it. Crack the case your shift forks are prob bad that is exactly what mine was doing. you might be lucky and get away with just wear pads but this is what happened to mine.
__________________
1993 Jeep Wrangler
4.0L Tom Woods rear HD shaft
D30 w/yukon alloys, lock right, jb4x4 bracket, Rusty's HD tie rod 8.8w/ LSD,SOA xj rear 100" wheelbase, homemade greasable boomerang shackles, SS braided lines, 1" prothane body lift, 35" TrXus M/T, smitty built XRC.
lots of gen right armor and rear stinger.
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12-01-2008, 11:49 AM
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#4
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Registered User
Join Date: Mar 2007
Location: Indiana
Posts: 345
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Quote:
Originally Posted by crb577
stop driving it. Crack the case your shift forks are prob bad that is exactly what mine was doing. you might be lucky and get away with just wear pads but this is what happened to mine.
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Ouch! I hope it's just the pads then!
Quote:
Originally Posted by Mean Max
The gears may indeed be failing to mesh properly. The question becomes, "Why?"
It is possible that your shift pads are worn out/missing on the shifter forks, or the forks may be damaged/bent.
Here is a link to the replacement pads.
http://www.quadratec.com/products/52219_01.htm |
Thanks Max! If I just open the case in the middle, is the fork/pads right there and easy to change?
__________________
96 Cherokee Sport w/ 4.0L, AW4, NP231, 4" Rough Country Lift, 31" BFG AT's
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12-01-2008, 01:04 PM
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#5
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FORMELY BIGPIMPIN
Join Date: Mar 2008
Location: placerville, ca
Posts: 4,171
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before you pull the whole thing out ,take a look at the spring and ball that keep the shift fork rail inplace. its accessed from the out side. if theres a lot of metal in your oil then you might as well pull the whole thing out anyway and rebuild it.
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red 92 yj,4.0,dana 44 rear,xj driveshaft,rubi 4-1 tc,35"tires,smitty built winch,oba, 6" flares,hand throttle,aussie's front and back,posi-lock,6" lift.anti-wrap, hombrew bumpers, rack and sliders,cb,rear shock truss <>< ,MY BUILD: http://www.jeepforum.com/forum/showt...hp?t=613943see
Two fish swim into a concrete wall. One turns to the other and says 'Dam!'
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12-01-2008, 01:21 PM
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#6
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Registered User
Join Date: Mar 2007
Location: Indiana
Posts: 345
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What bolt/nut do you remove to check the ball/spring from the outside?
Would changing my fluid help at all? I haven't checked it
__________________
96 Cherokee Sport w/ 4.0L, AW4, NP231, 4" Rough Country Lift, 31" BFG AT's
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12-01-2008, 01:25 PM
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#7
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Registered User
Join Date: May 2005
Location: Colchester, VT
Posts: 941
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personally I think if it's doing that then you have symptoms of exactly what happened to me it doesn't take long and is very easy to crack the case open to take a look inside everything is very easily accessible takes me about 15 mins to crack a 231 now. they are very easy to work on just be sure to make lots of mental notes about how things came apart. label everything that comes out as well. good luck and changing your oil prob won't help the situation but wouldn't hurt it either.
__________________
1993 Jeep Wrangler
4.0L Tom Woods rear HD shaft
D30 w/yukon alloys, lock right, jb4x4 bracket, Rusty's HD tie rod 8.8w/ LSD,SOA xj rear 100" wheelbase, homemade greasable boomerang shackles, SS braided lines, 1" prothane body lift, 35" TrXus M/T, smitty built XRC.
lots of gen right armor and rear stinger.
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12-01-2008, 02:03 PM
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#8
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Registered User
Join Date: Apr 2008
Location: chicago
Posts: 525
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Quote:
Originally Posted by crb577
stop driving it. Crack the case your shift forks are prob bad that is exactly what mine was doing. you might be lucky and get away with just wear pads but this is what happened to mine.
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i remember seeing that! lol the oil was shiney from all the fragments ahahah
__________________
1994 yj. lifted 4 inches locked, loaded, and armored!
Member of Great Lakes Jeep Thing
and supporting jeeps gone wild
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12-01-2008, 02:16 PM
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#9
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Registered User
Join Date: Mar 2007
Location: Indiana
Posts: 345
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Sunuva!!! lol
__________________
96 Cherokee Sport w/ 4.0L, AW4, NP231, 4" Rough Country Lift, 31" BFG AT's
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12-01-2008, 04:21 PM
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#10
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Registered User
Join Date: May 2005
Location: Colchester, VT
Posts: 941
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Yeah the mechanic that looked at it told me my t-case was just fine and then i brought it to my cousin's tranny shop and he said it was my t-case so i found out for myself but it's all fixed now and it's getting a 4:1 in a few weeks
__________________
1993 Jeep Wrangler
4.0L Tom Woods rear HD shaft
D30 w/yukon alloys, lock right, jb4x4 bracket, Rusty's HD tie rod 8.8w/ LSD,SOA xj rear 100" wheelbase, homemade greasable boomerang shackles, SS braided lines, 1" prothane body lift, 35" TrXus M/T, smitty built XRC.
lots of gen right armor and rear stinger.
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NP231 Popping out of Gear
