Dadinator Posted September 10, 2014 Share Posted September 10, 2014 It would appear the friggin' transfer case is popping. Chain perhaps? Did it a year or so ago. Got one out of a junkyard and now this one is doing it. How new of a 231 can I put into this thing? What fits? I don't want to get another "old" one again and have it last only a year. Link to comment Share on other sites More sharing options...
cruiser54 Posted September 11, 2014 Share Posted September 11, 2014 I you'e got a 90, it's 87 to 90 or selection. How about putting a chain in it? Link to comment Share on other sites More sharing options...
COMJNUT Posted September 11, 2014 Share Posted September 11, 2014 basically unlimited choices, it depends on how much work and $ you want to put into it. http://www.novak-adapt.com/catalog/transfer_case_parts/np_231_parts.htm http://www.novak-adapt.com/knowledge/np_nvg_input_gears.htm you can buy a input gear and cut it down, possibilities are endless. Link to comment Share on other sites More sharing options...
JeepcoMJ Posted September 11, 2014 Share Posted September 11, 2014 A chain is like $80. Rebuilding these cases is stupid easy "How easy." You say? Well, I can do it... Link to comment Share on other sites More sharing options...
Mattwheels Posted September 11, 2014 Share Posted September 11, 2014 I also have an old input shaft I don't need anymore, I changed my 231 from a 89 to a 96 to match my tranny. let me know if you need it Link to comment Share on other sites More sharing options...
88whitemanche Posted September 11, 2014 Share Posted September 11, 2014 What is this popping sound your talking about? I've been trying to diagnose a popping noise when I let go off the clutch.... I'm thinking it may be my clutch..I've checked u-joints and they're good...but after reading This thread I may have to put it up on jackstands to check it out.... It instantly happen when let off the clutch to accerlarate after first gear... Link to comment Share on other sites More sharing options...
yxmj Posted September 11, 2014 Share Posted September 11, 2014 What is this popping sound your talking about? I've been trying to diagnose a popping noise when I let go off the clutch.... I'm thinking it may be my clutch..I've checked u-joints and they're good...but after reading This thread I may have to put it up on jackstands to check it out.... It instantly happen when let off the clutch to accerlarate after first gear... I would assume he only gets the popping sound when 4WD is engaged? Thats why he is thinking TC I have heard that sound many times myself..........like mentioned above the chain (once the T-case is out) is about a 40 minute repair :thumbsup: Link to comment Share on other sites More sharing options...
xjrev10 Posted September 11, 2014 Share Posted September 11, 2014 231 are simple to rebuild. Pull it apart and fix it. Nothing is going to jump out at you. Link to comment Share on other sites More sharing options...
Mountain Dude Posted September 11, 2014 Share Posted September 11, 2014 You can also upgrade to a wider chain and sprockets from an NP207 or a Chevy NP231C. Link to comment Share on other sites More sharing options...
Eagle Posted September 11, 2014 Share Posted September 11, 2014 It would appear the friggin' transfer case is popping. Chain perhaps? Did it a year or so ago. Got one out of a junkyard and now this one is doing it. How new of a 231 can I put into this thing? What fits? I don't want to get another "old" one again and have it last only a year. Even if you get one out of a 2001 XJ (which will have the new-style, inferior, vibration-prone output shaft), it will be 13 years old. Why not just put a chain in the one you have? Link to comment Share on other sites More sharing options...
Dadinator Posted September 12, 2014 Author Share Posted September 12, 2014 Because I didn't know it would be as simple as a chain. LOL! Where is a good place to check for chains? Thanks! Link to comment Share on other sites More sharing options...
hillbilly51 Posted September 12, 2014 Share Posted September 12, 2014 If you've got the "Part Time" 4 wheel drive, you can't run it in 4 wheel on dry pavement. The chain will jump teeth in the transfer case resulting in a loud "POP" Ask me how I know? steve Link to comment Share on other sites More sharing options...
yxmj Posted September 12, 2014 Share Posted September 12, 2014 Because I didn't know it would be as simple as a chain. LOL! Where is a good place to check for chains? Thanks! If you have an account with them E-bay is good Link to comment Share on other sites More sharing options...
xjrev10 Posted September 12, 2014 Share Posted September 12, 2014 http://www.quadratec.com/products/918612_05.htm Not dirt cheap but you'll never touch it again. Link to comment Share on other sites More sharing options...
Dadinator Posted September 12, 2014 Author Share Posted September 12, 2014 I know not to run it in 4wd on dry pavement. I do have an account on ebay, Was really asking is there a brand to buy that is preferred or more important not to buy. I will check quadratec. I like them anyway. Link to comment Share on other sites More sharing options...
Dadinator Posted October 28, 2014 Author Share Posted October 28, 2014 Just an update. Bought a chain on ebay. Installed pretty easily. Frankly removing the tcase from the truck was the hardest part. Sat on the workbench for a bit as other things got done first. You know how that is. Reinstalled this past weekend. All is good. now back to the brakes. :) Link to comment Share on other sites More sharing options...
mvusse Posted October 29, 2014 Share Posted October 29, 2014 When I installed a heavy duty slip yoke eliminator (for which you have to get into the case just a little bit deeper than just replacing the chain), I did it under the truck; didn't bother to take the case out from under, or even unbolt it from the transmission. Jacked up the truck, set a transmission jack under the cross member, unbolted the cross member from the frame rails and lowered it down a few inches. Link to comment Share on other sites More sharing options...
joester1908 Posted October 29, 2014 Share Posted October 29, 2014 I pulled my T case when I did the SYE. I decided while it was apart to replace the bearings, chain and oil seals. So simple to work on. Link to comment Share on other sites More sharing options...
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