Super Select 4H vibration




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  1. #1
    4ePikanini Guest

    Default Super Select 4H vibration

    I went to go and fetch SWAMBO from work just now and used 4H ( not 4HLc ) on tar for the first time ( as roads were full of pools and it was raining hard ).

    I have used it before in 4LLc on a trail and it was brilliant.
    I have used it before in 4H & 4HLc on gravel and it was brilliant.

    Now, 4H on tar gives noticeable extra vibration and rumble noise with extra stiffness in steering ( I suppose this indicates the level of vibration that it is felt on tar but not on gravel ).

    The feeling is almost as if the handbrake is up. I feel it in the seat and not really in the steering ( except for the heavier steering )

    Is this normal? - I'm paranoid when it comes to sounds and stuff from my cars.

    I have checked tyre pressures
    I have checked oil in transfer case and gearbox ( It has fresh oil in with less than 2000km on it )
    I felt the gearbox on return ( fairly cool ), but the trip was less than 2km and I suppose water splash helped with cooling.

  2. #2
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    Not so sure about the stiffness in the steering up the other signs might point to a out of balance front prop.
    1997 Pajero 3.5 GLS I miss her.
    2009 Pajero 3.2DID LWB GLS. Thoroughly enjoying her.

  3. #3
    4ePajero Guest

    Default

    It sounds as if you have different ratios front and rear!

    Make sure it did not select the centre diff lock!

    Take it on a gravel road. It should vibrate the same as on tar. Engage 4HLc and check for any difference in how it handles/steers.

  4. #4
    4ePikanini Guest

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    Quote Originally Posted by Wynsam View Post
    Not so sure about the stiffness in the steering up the other signs might point to a out of balance front prop.
    definite possibility as I recall while working on the rebuild that there looks to be weights missing on the front drive shaft - like the ones in the picture.


  5. #5
    4ePikanini Guest

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    The handling is fine ( just a small tad heavier than in 2WD )

    It definitely wasn't in 4HLc - I double checked.

  6. #6
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    Is this on a triton or gen 2 pajero, dont use 4hlc on dirt road and u sure it was not just the road surface

    Paddyjack

  7. #7
    4ePikanini Guest

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    It is a 1993 Gen2 Pajero.

    I am sure it was not the road surface as I switched back to 2H the last 500m or so and the vibration was instantly gone.

    Why not use 4HLc on gravel?

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    it done that in my 95 pajero and think what i probly done wrong was ingage the transfer lever to far at first and it selected 4hlc but i positioned it in 4h, so noisy drive and steering was hard,there was 50/50 transfer and the centre diff light was flashing. what i ended up doing was take it back to 2h and drive it slowly for 2 or so kms while safely turning left to right then tried 4h again and wham-bang-mam it worked

    Paddyjack

  9. #9
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    Quote Originally Posted by 4ePikanini View Post
    Why not use 4HLc on gravel?
    If the gravel is loose enough then there is no reason to not use it and every reason to use it AFAIK.
    1997 Pajero 3.5 GLS I miss her.
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    Quote Originally Posted by Paddyjack View Post
    Is this on a triton or gen 2 pajero, dont use 4hlc on dirt road
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  11. #11
    4ePajero Guest

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    Quote Originally Posted by SimonB View Post
    Says WHO
    PaddyJack!

  12. #12
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    unless its really spippery surfaces it will be hard on the transfer box and thats the purpose of 4h on normal dry/wet dirt and tar roads

    Paddyjack

  13. #13
    4ePajero Guest

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    Quote Originally Posted by Paddyjack View Post
    unless its really spippery surfaces it will be hard on the transfer box and thats the purpose of 4h on normal dry/wet dirt and tar roads
    I use 4HLc whenever I hit gravel roads, which is a lot!

    Me finks you've got it wrong.

    Other 4x4s without a centre diff lock is similar to SuperSelect 4HLc, and it is common wisdom on this forum that that is what you use on gravel roads.

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    4e

    The heavy steering is quite familiar as far as my Gen2 2.8 goes. I wondered about and bar the locked hubs and some torque countering your steering effort I am not sure what changes. But steering was always heavier with fron engaged.

    As for your vibration. Could be your front prop balance as well as side shafts. I have experienced sideshafts giving a vibration and it would be noticable on smooth tar.

    As far as i know, one is better off using 4HLc on gravel, snow and any loose surface. Most manuals state taht too.

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    ok, point taken. But why use 4hlc on dirt road when there is 4h

    Paddyjack

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    Between 2H and 4H on my Gen 3 there is no vibration or heaviness in steering.

    Must be a Gen 3 thing.

  17. #17
    4ePikanini Guest

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    so

    - i'm either paranoid
    - or I have an unbalanced front propshaft - my bet
    - or the oil is wrong - I have 80w-90 gl-5 in the transfer case

  18. #18
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    Paddyjack

    I use it for predictability of power distribution so that you don't haved to wait for the slip to generate torque transfer. It becomes nice and clear what your beasty is doing.

    4e

    Don't think it is the oil, check shaft components, service side shafts...and bob should be your uncle.
    Last edited by Sergey; 2010/01/26 at 07:56 PM.

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    Quote Originally Posted by Paddyjack View Post
    ok, point taken. But why use 4hlc on dirt road when there is 4h
    Paddy... just think about it, 4H is really just all wheel drive, but until you have the CD locked you do not have equal distrubution of power between axles when both wheels on an axle lose grip. 4H is a lot better on the dirt than 2H, but 4HLc is vastly superior for traction. It
    is the same as the part time 4x4 uys engaging 4x4 on the dirt - it's generally accepted practice.

    Getting back to the topic... if I was 4e I would change trasfer oil first and work from there
    Last edited by SimonB; 2010/01/26 at 09:32 PM.
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  20. #20
    4ePikanini Guest

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    Transfer oil has less than 2000km on it.

    I think I'll take the front prop off and send for balancing as I spotted a mark where a balancing block came off the prop.

    Only hassle is I gotta drain the oil and the previous workshop that worked on the car tightened the filler for the transfer case so tight that I had to fill via the transfer gear lever.

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