jtdesigns Posted August 23, 2008 Share Posted August 23, 2008 How hard is it to replace the transfer case chain on a np231? Would a 96 xj with auto be the 231? Link to comment Share on other sites More sharing options...
DirtyComanche Posted August 23, 2008 Share Posted August 23, 2008 Not hard, and yes. You'll need some decent size snap ring pliers to get the rings off the mainshaft as you pull it apart. Start at the @$$ end with the tailcone and work foreward. Link to comment Share on other sites More sharing options...
jtdesigns Posted August 23, 2008 Author Share Posted August 23, 2008 Not hard, and yes. You'll need some decent size snap ring pliers to get the rings off the mainshaft as you pull it apart. Start at the @$$ end with the tailcone and work foreward. Cool thanks... know of any good write-up? Link to comment Share on other sites More sharing options...
Pete M Posted August 23, 2008 Share Posted August 23, 2008 96 XJ with auto could also be the 242. Link to comment Share on other sites More sharing options...
Geonovast Posted August 23, 2008 Share Posted August 23, 2008 How hard is it to replace the transfer case chain on a np231? Would a 96 xj with auto be the 231? Wouldn't it be easier to just swap the whole case? Link to comment Share on other sites More sharing options...
jtdesigns Posted August 23, 2008 Author Share Posted August 23, 2008 96 XJ with auto could also be the 242. Whats the physical difference? Wouldn't it be easier to just swap the whole case? Yeah, probably, if I go JY'ing then the swapped one might need it too,, I don't know what Ill do right now, just getting me edumacation right now boss.. Link to comment Share on other sites More sharing options...
Geonovast Posted August 23, 2008 Share Posted August 23, 2008 NP242 is the full time case, or all wheel drive. It has a viscous coupling for the front, which allows you to be in 4wd on dry pavement, all the time when in 4wd full time. Link to comment Share on other sites More sharing options...
jtdesigns Posted August 23, 2008 Author Share Posted August 23, 2008 NP242 is the full time case, or all wheel drive. It has a viscous coupling for the front, which allows you to be in 4wd on dry pavement, all the time when in 4wd full time. Hummm it has something on the sun visor that states part time this, part time that,, I believe it was part time for high and low,, almost certain it did. Command trac?? Maybe??? :dunno: Link to comment Share on other sites More sharing options...
Eagle Posted August 23, 2008 Share Posted August 23, 2008 NP242 is the full time case, or all wheel drive. It has a viscous coupling for the front, which allows you to be in 4wd on dry pavement, all the time when in 4wd full time. The 242 does not have a viscous coupling, it mas a mechanical differential. JT, "CommandTrac" is the 231, "SelecTrac" is the 242. Link to comment Share on other sites More sharing options...
jtdesigns Posted August 23, 2008 Author Share Posted August 23, 2008 NP242 is the full time case, or all wheel drive. It has a viscous coupling for the front, which allows you to be in 4wd on dry pavement, all the time when in 4wd full time. The 242 does not have a viscous coupling, it mas a mechanical differential. JT, "CommandTrac" is the 231, "SelecTrac" is the 242. There it is,,, I went out and checked it did say Command Trac,, I knew it did.. Thanks guys, I don't care what they say about yous,,, y'all aight be me! Link to comment Share on other sites More sharing options...
Geonovast Posted August 23, 2008 Share Posted August 23, 2008 NP242 is the full time case, or all wheel drive. It has a viscous coupling for the front, which allows you to be in 4wd on dry pavement, all the time when in 4wd full time. The 242 does not have a viscous coupling, it mas a mechanical differential. JT, "CommandTrac" is the 231, "SelecTrac" is the 242. My bad, I'd been told it was a coupling. Link to comment Share on other sites More sharing options...
JeepcoMJ Posted August 23, 2008 Share Posted August 23, 2008 NP242 is the full time case, or all wheel drive. It has a viscous coupling for the front, which allows you to be in 4wd on dry pavement, all the time when in 4wd full time. The 242 does not have a viscous coupling, it mas a mechanical differential. JT, "CommandTrac" is the 231, "SelecTrac" is the 242. My bad, I'd been told it was a coupling. the coupling is in the np229 or np228 case from the 86 and prior cherokees and some comanches. this is part of a system called "selec-trac" as for the location of the differentialin the NP242.. it is located on the output shaft. I just rebuilt an NP242 for a friend of mine. the chain cost was around $80, the new oil filter was $8. the filter should be the same between cases and the chain should be similarly priced, if not the same part. as for taking it apart, here's the short of it; remove front driveshaft yoke (not sure if this is necessary, but it did make my project easier, plus allowed me to inspect the bearings) remove rear output housing. remove snap-ring on output shaft remove speedo gear/cable remove secondary output housing. remove rear case housing (main cap on back of case). there are just bolts here. the oil pump will come off with it, so be careful...the pickup tube and filter may want to stick in the forward section, but need to come out with the rear case to avoid damaging the O-ring at the filter from there, if you pop the front output shaft out, and loosen the rear output shaft (pull back a bit), the chain should pop right off. you should take the output shaft out and clean it (parts washer or brake cleaner) as well as clean the case out, and pull the magnet out of the bottom and clean it until it has zero shavings on it (the magnet is located directly below the front output shaft. this can all be done with the case in the jeep, but I suggest doing it with the case out of the jeep so that you don't spend as much time on your back. Link to comment Share on other sites More sharing options...
maddzz1 Posted August 23, 2008 Share Posted August 23, 2008 Here a link: http://4x4trailhunters.com/article.php?id=20 Link to comment Share on other sites More sharing options...
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