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Bj74 pto noise

Discussion in '70-Series Tech' started by Jonobj74, Dec 30, 2012.

  1. Jonobj74

    Jonobj74

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    Hey guys new here , ive got a 89 bj74 jap import had it for two months seems like a great truck so far , ive just got a question theres a rattling / grinding noise when im driving that sounds like its from the pto ? Its only there while in gear and driving an stops when you press the clutch also seems to get louder at higher speeds , and if you put pressure on the pto engagment lever while driving the noise changes or even stops ?? Any ideas what it could be ? Cheers guys .
     
  2. kbushnz

    kbushnz

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    It could be several things....
    Need to do more playing to track it down...
    Input shaft bearings in the trans could be stuffed...
    Check by putting truck in N and with engine running put clutch in, if it goes quiet... its will more than likely be input shaft bearings...
    If it does it while moving.... The transfer-case's can wear at the idler shaft.. and also the rear drive output bearings can fail....
    The only other thing it could be is the trans is touching somewhere on the body work and transferring normal sounds thru which sound terrible...
    Been there done that....
     
  3. roscoFJ73

    roscoFJ73

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    As kbushnz pointed out ,it maybe unrelated to the PTO ,however I think the PTO is simple to remove but you probably need the plate that coves the hole.

    If you live North of River ,Belmont gearbox and diff specialists are good people to deal with,Ive been there 2-3 times and they specialise in landcruisers
    U 6, 89 Windsor Rd
    WANGARA, WA, 6065

    Note they are not in Belmont;)

    How about introducing your self in new members thread;)
    https://forum.ih8mud.com/70-series-...s-members-say-hi-here-first-chit-chat-ok.html
     
  4. sadam_husain

    sadam_husain

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    Quick question about your PTO mate, is it a 3 position PTO ie: Forward-Neutral-Reverse or a 2 position PTO ie: Engage-Disengage?

    If its the 3 position PTO they have a constant drive onto an idler gear inside the pto if its a 2 position there is nothing moving in it untill its put into engage
     
  5. Jonobj74

    Jonobj74

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    cheers for the replies ,its a 2 position lever i have changed the oil in the tranny transfer case and pto box and it had a fair bit of metal particles in it , also adjusted the pto linkages to make sure the noise wasnt the linkages vibrating/rattling ,but its still there it just seems weird that the noise goes away when i put pressure on the pto lever.
     
  6. Glenn-BJ74

    Glenn-BJ74

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    make sure the gear is completely disengaged from the PTO gear running off the transfer gear shaft - put a small bungee on the lever pulling it forward to make sure its completely disengaged. Mine made a bit of noise like that after the 1" body lift.
     
  7. zuker81

    zuker81

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    Old thread - but I have this same problem on HZJ73, found this thread. I want to say it has something to do with one of the pivot points for the PTO lever linkage being bolted directly to the tranny with natural play in the linkage allowing for some vibration to come up the lever. It seems like a totally innocuous rattling noise at a certain RPM in each gear. Another thread on here that I cannot find now someone stated this is normal behavior for certain year models depending on if the lever linkage had a bushing or not, which sounds about right. Can confirm that light pressure to the PTO lever fixes it, so pulling it forward semi-permanently should do the trick. There's a plastic tab in the passenger footwell that I was able to chain tie-wraps to which doesn't look to bad visually or obscure foot room. It's also removable should the PTO need to be used and adjustable because.. tie wrap. Maybe someone can think of a more permanent solution but this works for me for the time being.

    IMG_0091.jpg


    IMG_0090.jpg
     
  8. SuperDuperCruizer

    SuperDuperCruizer

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    Does the arm/linkage have some way to adjust the engage and disengage position? This is the forward, neutral & reverse PTO, but you can see there’s a jam nut/threaded end to adjust the position of the arm.

    7D91379D-FC75-4F55-91D4-25C643021EB8.jpeg