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  1. #76
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    did you check the tightness of the collapsing point in the front driveshaft?, did you check the double cardan ball socket for cracks

    this "tailcone" option is null, the tailcone only holds a seal, there is no rear bearing around the yoke, that exposed 242 is no different than the rear of every single tcase of transmission with a slipyoke, the bearing is right in front of the yoke, every jeep liberty with a 242 has the exposed style with a shorter rear driveshaft and they dont have problems

    i would looking more into your front driveshaft or caster adjustment in the front

  2. #77
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    Quote Originally Posted by moparrr07 View Post
    did you check the tightness of the collapsing point in the front driveshaft?, did you check the double cardan ball socket for cracks

    this "tailcone" option is null, the tailcone only holds a seal, there is no rear bearing around the yoke, that exposed 242 is no different than the rear of every single tcase of transmission with a slipyoke, the bearing is right in front of the yoke, every jeep liberty with a 242 has the exposed style with a shorter rear driveshaft and they dont have problems

    i would looking more into your front driveshaft or caster adjustment in the front
    Like I said...the vibration is there with or without the front driveshaft installed. No difference. And if you tow the Jeep at 65 mph without any drive shafts in place, it is nice and smooth. That eliminates any problem with the wheels, tires, or alignment. The parts list for the earlier transfer cases show the tail cone, a bearing seal, AND a bushing that holds the rear shaft in place. It's not a bearing, but it does help support the end of the shaft.
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  3. #78
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    if you pull the rear driveshaft and there is still a vibration (as you stated) then there is no issue with the tailshaft support, as it is not being used

    that longer tailcone isnt just a 242 thing, most of the 231s in the 2000s used this same style, there are literally millions of vehicles with the exposed style shaft that are fine

    id guess an internal tcase problem base on your description, just coincidence it happened with 2 tcase

  4. #79
    Member T-Nave's Avatar
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    I just put a 242 in my 9er and I have a slight vibe. My front drive shaft hasnt been in since the swap. It could be a bad bearing but in my experience a bad bearing has to be pretty shot to cause a vibration. They typically squeal and or whine when they go bad. Im going to play with the pinion angle a bit and see if I can correct it. I will let ya know how it goes.
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  5. #80
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    Quote Originally Posted by 1 BAD ZJ View Post
    Like I said...the vibration is there with or without the front driveshaft installed. No difference. And if you tow the Jeep at 65 mph without any drive shafts in place, it is nice and smooth. That eliminates any problem with the wheels, tires, or alignment. The parts list for the earlier transfer cases show the tail cone, a bearing seal, AND a bushing that holds the rear shaft in place. It's not a bearing, but it does help support the end of the shaft.
    MY 231 has that bushing in the tail cone. even at 6" of lift now on the case with a 1" drop the vibes are nil. my '93 ZJ at the same lift, same shafts, etc.....with an exposed tail end 231 case from a '96 XJ had HORRIBLE vibes. it's amazing how much difference there is between my '93 5.2 on 6" with a '96 231 and my 5.9 on 6" with a '95 231.
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  6. #81
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    I have the vibe too and I got my 242 from a ZJ. I have a 4.5 lift and a SYE running on 32's, u joint front axle shafts with a new front CV drive shaft. The vibe starts at 70 MPH. I'm thinking about disconnecting the front shaft. I't feels like its coming from the front.
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  7. #82
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    I just swapped in a 242 from a 99 XJ into my 5.9 last week. Pulled from the takeapart and put it in that night. It was a direct swap, plug and play, everything worked and fit liked it was supposed to be there. No vibes and all the crap I hate about driving a full time rig is gone. I've not checked mpg yet, but I think its a bit better. This thing is sick in 2wd.

    No new vibes...actually has less...

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  8. #83
    Member Mark 318 ita's Avatar
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    any news about those vibes?

    in these days i'm thinking about swap a 242 or 231. i'm not sure what to do.

    i think the 242 is stronger, if you read here http://jeep.wikia.com/wiki/List_of_Jeep_transfer_cases
    it says that the 2nd number is the strenght.

  9. #84
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    Quote Originally Posted by Ninergrad View Post
    So should I swap back my 249 to see if the vibrations go away??



    I am not sure about the reverse.
    She only starts to vibrate at speeds over 50mph, it is hard to match that speed in reverse.
    Front diff was completely rebuilt after this:
    Ok, question. Does that yoke mount to the CV joint pinion?

  10. #85
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    Quote Originally Posted by x10radsponge View Post
    Ok, question. Does that yoke mount to the CV joint pinion?
    Yes, but I think pinion gear or input pinion might be a better description of what it's bolted to.

    FYI those are a bit of a PITA to do as you need to get (or fab) something to hold the flange against the torque needed to turn the nut that's in there

  11. #86
    Member Mark 318 ita's Avatar
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    hi guys, excuse me, i have a question: do you guys have vibes just in 4wd or even in 2wd?

  12. #87
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    The later exposed slip yoke style transfer case is known to cause vibes on XJs with lifts. Typically solved by a SYE and a double cardan shaft.

  13. #88
    Member Mark 318 ita's Avatar
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    Quote Originally Posted by Mark 318 ita View Post
    hi guys, excuse me, i have a question: do you guys have vibes just in 4wd or even in 2wd?
    guys i have a big doubt with the 242: can i use 4wd full time at any speed? like the 249? or do i have some limits?

  14. #89
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    Any speed. But if you are doing 60+ mph you really don't need it. I usually switch mine back to 2wd when on the highway. While it might not be as good at AWD as the 247/249 in bad weather I have never had to use 4 part time in bad weather on the road.

  15. #90
    Member Mark 318 ita's Avatar
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    10.4 thanks, i asked because i'd like to do some drag racing so i need the 4wd full time.

  16. #91
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    i might be ditching my 242. its nice, but i liked my 249 more.
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  17. #92
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    Quote Originally Posted by Saleen4971 View Post
    i might be ditching my 242. its nice, but i liked my 249 more.
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  18. #93
    Member Mark 318 ita's Avatar
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    hi guys i'm buying in these days a 242 coming from a 96 zj 4.0 I6...question is:do i need some other pieces in addition to the tcase itself to complete the swap??

    thanks guys

  19. #94
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    Funny I just now saw this thread. I recently swapped a 242 and rebuilt LSD d44a into my niner. Before I didnt have vibes but now I do. They start at 70ish mph. Im beginning to think it's Tcase related. I replaced my tranny rear seal when I did the swap and it leaked so I replaced it again and it still leaks. I yanked my front shaft just to make sure my castor wasnt off and no real change.. I noticed one day however that when I was in 4 full time (it was snowing) on the highway, the vibes came like always but they came at about 5-10mph later.. So in 2wd they start around 70-75 and in 4pt they began around 75-80 or so. I am pretty knowledgeable about these Tcases as I have torn them apart more times than I would like to admit, but even this has me a little stumped. Im wondering if its a bad bearing somewhere....

    I put the same style 242 (post 96 with the external tailshaft) in my offroad built ZJ back when it was at 2" and never had any vibes....
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  20. #95
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    I Have a 9er with a 242 I have a vibe mostly on acceleration. I made it better with adjusting the pinion angle. haven't pulled the front shaft but I did notice there is some slop in the slip yoke in the rear shaft. Should I use a xj slip yoke on the zj shaft? I did have a craped out trans mount I have changed out. It did help the vibes but they didn't go away completely. but I did notice this winter in awd mode it was much better almost gone. I will try it again with the new mount right after I put the front end back together.

  21. #96
    Member csouers's Avatar
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    Here to report 2+ years with a vibe-free 242 out of a 97 ZJ. Rebuilt by me with only a hint of noise, from a misinstalled intermediate>input shaft bearing. I don't feel like tearing it down. Ef it.

  22. #97
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    Quote Originally Posted by impulse byer View Post
    I Have a 9er with a 242 I have a vibe mostly on acceleration. I made it better with adjusting the pinion angle. haven't pulled the front shaft but I did notice there is some slop in the slip yoke in the rear shaft. Should I use a xj slip yoke on the zj shaft? I did have a craped out trans mount I have changed out. It did help the vibes but they didn't go away completely. but I did notice this winter in awd mode it was much better almost gone. I will try it again with the new mount right after I put the front end back together.
    Slop in either slip yokes will cause vibrations. Since you say its better in 4x4 I would remove the front shaft and see what happens. I was chasing vibes on my XJ which seemed to be better in 4x4. The play in the slip joint in the front drive shaft was the culprit.

  23. #98
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    I had a harmonic/vibe in my 96. Mostly between 50-70mph. Spent too much $ hunting it down. Turned out to be spider gears.

    Seems like nobody ever talks about them or swaps them out. No good way to check them, replace if over 100K.

    Vibrations and harmonics are often a culmination of several worn items. If it rotates, it can vibrate or amplify a noise from a component 3 or 4 steps away.

  24. #99
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    Quote Originally Posted by SilverXJ View Post
    Slop in either slip yokes will cause vibrations. Since you say its better in 4x4 I would remove the front shaft and see what happens. I was chasing vibes on my XJ which seemed to be better in 4x4. The play in the slip joint in the front drive shaft was the culprit.
    I will try it and repot back.

  25. #100
    Member SilverXJ's Avatar
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    Quote Originally Posted by Jeep98ZJ View Post
    Maybe the 242 fromt he XJ is the problem? You both used one from an XJ and have problem. I used one from a ZJ and have no problems. Just a thought
    I just installed a 242 out of a 2000 XJ with 80,000 miles. No vibrations. I only have the up country 1" lift though. I specifically looked for a low mileage transfer case to avoid issues like this. I know on my 150,000 mile 249 I would get vibes about 80 from play in the slip yoke. I didn't reused my stock yoke because of this.

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