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  1. #51
    Forum CONDUCTOR Man Z88Z's Avatar
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    I thought I read somewhere that there's a HD 242 also, from the Hummer or something - or do they use the 231?

    Assuming there is one, couldn't that chain etc be used in our 242 or does it not fit the housings?

    For offroad use I'm sure the 231 or 242 is better but I gotta say for street use the 249 is fine by me - assuming you have one that works LOL One of these days I'd like to do the 247/249 hybrid though.

    I can see where for 1/4 mile use the 242 might come in handy too.


    Speaking of which - for the 1/4 mile folks with the 242 does anyone use 2WD for burnouts etc, then FT for the run? Anyone tried that?

  2. #52
    Member NoTime's Avatar
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    Yep,,, many a time ,,, now that I have 4 drag radials,,, not so much.
    1998 ZJ 5.9 Platinum - 408 SC Sleeper ( 7.49 / 11.? )
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  3. #53
    Member csouers's Avatar
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    Have any of you suspected that a worn out chain is causing the vibes?

  4. #54
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    a worn out chain caused the 231 on my 93 zj to explode on a drive from chicago to florida... it was very interesting..

  5. #55
    RallyJeep GO
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    Some V8 WJs came with a 242HD. They won't swap to a ZJ though, as they don't have a speedo sensor provision.
    1998 ZJ 5.9 Limited - Deep Slate
    Mods: Big trans cooler, 231 swap, Indy 2.02 heads prepped by IMM, Comp 20-744-9 cam, 1.7 HS roller rockers, 52mm TB, Airgap manifold, DT headers and full 3" exhaust, SCT tune homebrewed by me, Martin Saine valve body, B&M tranny pan, magic suspension made from unicorn tears, power steering cooler, lots of lighting mods

  6. #56
    Forum CONDUCTOR Man Z88Z's Avatar
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    Quote Originally Posted by comptiger5000 View Post
    Some V8 WJs came with a 242HD. They won't swap to a ZJ though, as they don't have a speedo sensor provision.
    Same 242 HD as the Hummers? ...or is that a 231 HD in the H's?


    I know the Tcases won't swap but will the internal parts like chain etc, swap?

  7. #57
    RallyJeep GO
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    It's similar to the 242HD in the Hummers, but not quite. I think those used the 242HD-AMG, which is even slightly stronger.

    I'm not sure if any 242HD parts can swap to a regular 242. I think I might have seen mentions of the chain swapping, but I'm not sure.
    1998 ZJ 5.9 Limited - Deep Slate
    Mods: Big trans cooler, 231 swap, Indy 2.02 heads prepped by IMM, Comp 20-744-9 cam, 1.7 HS roller rockers, 52mm TB, Airgap manifold, DT headers and full 3" exhaust, SCT tune homebrewed by me, Martin Saine valve body, B&M tranny pan, magic suspension made from unicorn tears, power steering cooler, lots of lighting mods

  8. #58
    Predator9 KennY5_9PowerS's Avatar
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    Quote Originally Posted by enlight22 View Post
    a worn out chain caused the 231 on my 93 zj to explode on a drive from chicago to florida... it was very interesting..
    hahashahahahahaha wtf that BBBBBBBBBBBBllllllooooooowwwwwwwwwsssssss
    1998 Deep Slate 5.9L-SOLD to Diirty ZJ
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  9. #59
    RallyJeep GO
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    It's not unheard of. I've seen photos of the aftermath of a very worn chain in a 242 rubbing on the case, which caused the case to split apart while driving.
    1998 ZJ 5.9 Limited - Deep Slate
    Mods: Big trans cooler, 231 swap, Indy 2.02 heads prepped by IMM, Comp 20-744-9 cam, 1.7 HS roller rockers, 52mm TB, Airgap manifold, DT headers and full 3" exhaust, SCT tune homebrewed by me, Martin Saine valve body, B&M tranny pan, magic suspension made from unicorn tears, power steering cooler, lots of lighting mods

  10. #60
    Gen. 1 Troll Taz5.9's Avatar
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    Quote Originally Posted by cowboy63b View Post
    Good luck finding that magical fairy fart of a zj231, I quit looking and just pulled one from an xj.
    Believe it or not, i found one locally out of a '95 ZJ. Its got the newer gear cut, 23 spline .840 input gear, its got the tail cone covered rear output, and it has been rebuilt recently. I picked it up, de greased it, and tore it down. Eventually it will get the DHD internals.
    Slate 5.9 Limited 8"/ARB/IRO/KOR/OME/231
    White 5.9 Limited stock/231/30's
    93 ZJ SE-5.9 LTD clone

  11. #61
    Member GreenZJ's Avatar
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    Yeah, I found one at a pick n pull a couple years ago. Unfortunately I had to sell it this summer before I could put it in my ZJ.
    -'98 ZJ 5.9L Ltd Sunroof Delete Model-


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  12. #62
    Gen. 1 Troll Taz5.9's Avatar
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    WELL.....you boys will be interested to know that I did the '95 ZJ 231 swap in to my 5.9.....and guess what? those little vibrations I've had since I swapped in the 242, that I thought were front DS vibes.....are now gone with the ZJ 231!


    http://www.jeepsunlimited.com/forums...d.php?t=546562
    Slate 5.9 Limited 8"/ARB/IRO/KOR/OME/231
    White 5.9 Limited stock/231/30's
    93 ZJ SE-5.9 LTD clone

  13. #63
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    Quote Originally Posted by Taz5.9 View Post
    WELL.....you boys will be interested to know that I did the '95 ZJ 231 swap in to my 5.9.....and guess what? those little vibrations I've had since I swapped in the 242, that I thought were front DS vibes.....are now gone with the ZJ 231!


    http://www.jeepsunlimited.com/forums...d.php?t=546562

    that is interesting im still chasing vibes with my 242? I go in next week for a rebuild 242 and a sye. hope it helps. im getting tired of noise and vibes. my 249 had no vibes but was noisey... im ready to give up and have been looking a a diesel kj? but I love my 9er and im willing to give her one more shot! I had someone tell me that the 231 would cure my issues I laughed and dismissed him? maybe he is right..I guess I could do a 231 swap?

  14. #64
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    were your vibes in 4wd only? or in 2wd also? I have vibes in 2wd and noise in 4wd.
    Last edited by smoked59er; 12-25-2011 at 09:55 AM.

  15. #65
    Gen. 1 Troll Taz5.9's Avatar
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    Mine were both, no noises. The cash for clunkers 242 never gave me issues in a year and a half.
    Slate 5.9 Limited 8"/ARB/IRO/KOR/OME/231
    White 5.9 Limited stock/231/30's
    93 ZJ SE-5.9 LTD clone

  16. #66
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    why did you go to a 231 then?

  17. #67
    Gen. 1 Troll Taz5.9's Avatar
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    about as much aftermarket support as a Honda Civic, lighter weight, easier to take apart, easy in/out of 4wd unlike my 242, not many authentic ZJ 231's are swapped in to 5.9's. I had swapped a '96 XJ 231 in to my old 6" lifted '93 V8 ZJ nearly 10 years ago, and I liked it a lot. I had a factory 231 in my '99 XJ classic that I lifted on Long arms....I put an SYE in it which is cheap to do vs a 242.
    Last edited by Taz5.9; 12-26-2011 at 01:27 PM.
    Slate 5.9 Limited 8"/ARB/IRO/KOR/OME/231
    White 5.9 Limited stock/231/30's
    93 ZJ SE-5.9 LTD clone

  18. #68
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    I also have done a 242 swap with tom wood's driveshafts and have the same vibration, but it only vibrates at 65 mph and above. It is not rpm related. I am also runnning 2 inches of lift with replacement CV shafts. It never did it before with the NV249. I have read a few technical reports on driveshaft angles, and with a traditional driveshaft (one u-joint at either end), the angles need to be the same between the tc and the driveshaft and the driveshaft and the axle/pumpkin. On a CV style driveshaft, with the vehicle at ride height, the angle between the driveshaft and the pumpkin needs to be 0 (i.e. pinion is parallel with driveshaft). Just my .02
    1996 5.2 Grand Cherokee Laredo Mods: K&N FIPK, Flowmaster 44, Autometer Transmission Temp Gauge, Rancho 2 inch lift, NP242 Swap, Tom Woods Custom Front and Rear Driveshafts, 30x9.50-R15 Big O Big Foot A/T, 15x8 Mickey Thompson Classic II Wheels, Custom hand-built front bumper and rock sliders, blacked out grille, 55w driving lights, Destriped and debadged, hand-built dimple-died foot rest cover.

  19. #69
    Member squazz's Avatar
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    sinse this is is a sticky it should contain some usefull info which input dose the 249 behind a 5.9 have?
    my guess would be 96-98 ZJ's: .840" 23 spline input

  20. #70
    Pair of 9s
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    Evil 242 transfer case vibration from hell....that's what I have. I have a stock 5.9 with 242 transfer case. Started vibrating a year ago and got progressively worse. Vibration is speed related...starts about 40 MPH and gets worse as speed increases. My mechanic did a lot of testing and swears it's the transfer case. I bought another 242 case at a salvage yard, put it in, and the vibration is still there. Mechanic says it's because of the exposed tail shaft on that case that it doesn't have the support it should have. Is there any way to put a tail cone on this transfer case? What parts do I need for that? I don't know what to do anymore. We've tried everything else including rebalancing the drive shaft, replacing the output shaft with a new one, new transmission and engine mounts. Tires, brakes, rotors are all brand new and road-force balanced, etc. I've spent a bunch of money on this Jeep that is otherwise in great shape....only to be stuck with this vibration is killing me!
    1998 Stone White 5.9 - bone stock
    1998 Stone White 5.9 - 8 in long arm lift, built motor, lots of stuff.

  21. #71
    Forum CONDUCTOR Man Z88Z's Avatar
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    Sorry - I don't have much actual info about what parts are used, but George at transfercaseunlimited makes his 242's like that.

    I thought someone said early ZJ 242 had the output shaft housing. If not maybe the 249 rear half fits the 242?

    This one was built and installed by George








    Did the vibration come with the first 242, or was the 242 in there for a while before the vibration started?

    What kind of engagement does the shaft have on the output spline? Any chance it's too much or too little? Do you have the trans xmember 'drop' on it?

    No chance it's from a bad bearing on the diff input spline?
    Last edited by Z88Z; 08-14-2012 at 03:10 PM.

  22. #72
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    i have an earlier cherokee np242, its has the cone as pictured in the post above, it doesnt add any support over the newer style, it only moves the seal back 6 inches, nothing more

    -suggestion, what the difference in the angle between your front pinion gear and your driveshaft?

  23. #73
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    Quote Originally Posted by squazz View Post
    sinse this is is a sticky it should contain some usefull info which input dose the 249 behind a 5.9 have?
    my guess would be 96-98 ZJ's: .840" 23 spline input
    my 98 5.2 zj came with the longest tcase imput behind the 44re

  24. #74
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    ^ any 96+ ZJ should be the middle length input.

    I'm running a 242 from a 97 4.0 ZJ (t-case has almost 200k on it now), and I've got no vibes attributable to the t-case, even when approaching triple-digit speeds.
    1998 ZJ 5.9 Limited - Deep Slate
    Mods: Big trans cooler, 231 swap, Indy 2.02 heads prepped by IMM, Comp 20-744-9 cam, 1.7 HS roller rockers, 52mm TB, Airgap manifold, DT headers and full 3" exhaust, SCT tune homebrewed by me, Martin Saine valve body, B&M tranny pan, magic suspension made from unicorn tears, power steering cooler, lots of lighting mods

  25. #75
    Pair of 9s
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    Quote Originally Posted by Z88Z View Post
    Sorry - I don't have much actual info about what parts are used, but George at transfercaseunlimited makes his 242's like that.

    I thought someone said early ZJ 242 had the output shaft housing. If not maybe the 249 rear half fits the 242?

    This one was built and installed by George








    Did the vibration come with the first 242, or was the 242 in there for a while before the vibration started?

    What kind of engagement does the shaft have on the output spline? Any chance it's too much or too little? Do you have the trans xmember 'drop' on it?

    No chance it's from a bad bearing on the diff input spline?
    The first 242 was in for a while before the vibration started.....got worse over time. My long time mechanic (15+ years) made it his mission to find out where the vibration was coming from, after I put new tires, brakes, rotors, ball joints, tie rod ends, engine and transmission mounts, rebalanced the rear drive shaft...and probably a few other things. He went so far as to mount the tires on a different set of rims to see if that was the problem. The original rims, by the way, are all a little out of true, but that didn't change the vibration. Then he took it for numerous test rides with front drive shaft out, rear drive shaft out, then he tried towing it (at 65 mph) in different configurations, including transfer case in neutral and transmission in park (so nothing in the transmission is turning but the transfer case main shaft is still turning) and STILL it vibrated. In all cases there was almost no change in the vibration. Finally he towed it without any driveshafts in (transfer case NOT turning) and it was smooth as could be. Pretty much eliminated anything else. Then he tore the transfer case apart and could find nothing wrong inside that would cause the vibration. So I said lets just get another one and try it....which I did. This one out of a 1998 Grand. Vibration from Hell is still there, unchanged. My Jeep is STOCK, stock height, etc. It's not lifted, angles are where they should be, etc. U-joints are in good shape, the rear differential was rebuilt a year ago, and the rear drive shaft has been rebalanced twice. Both transfer cases came out of 1997 and 1998 Grand Cherokees. He says in his research he found a guy in Canada claiming to have found the same issue with these 242 cases and no tailcone and he "fixes" them by installing a rear tail cone from another transfer case that will fit this one. However, he could not find that reference back. My mechanic says he has never seen anything so stupid as to leave that rear output shaft without support like that. It has a lot of torgue on it and sticks out a long way from the rear bearing.

    Some people in this thread say they fixed the vibration by going to a 231 case. Not sure if that is with or without a slip yoke elimanator. I really wanted to keep the 242 but I'm not willing to spend a bunch more money hoping this or that will work THIS time. I'm willing to go to the 231 case IF I am sure it will fix the problem. The vibration is very annoying. This is not a much talked about problem on the forums but here I find a sticky dedicated to this problem so I'm obviously not alone. Most people want to start with all the things I've already elimated and it's a waste of time (GEE....maybe you have mud in your tires? My cousin Joe Bob once drove through a mud hole behind the barn and he had a vibration.......).
    Last edited by 1 BAD ZJ; 08-15-2012 at 03:22 PM.
    1998 Stone White 5.9 - bone stock
    1998 Stone White 5.9 - 8 in long arm lift, built motor, lots of stuff.

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