New to me 1990 HJZ73, lifted and really rough ride. Any suggestions??

Discussion in '70-Series Tech' started by TyGuy, Dec 6, 2018.

  1. TyGuy

    TyGuy

    Messages:
    4
    Media:
    19
    Albums:
    1
    Likes Received:
    0
    Joined:
    Dec 6, 2018
    Location:
    Malawi
    Hi all,

    New to forum and Landcruisers. I live in Africa and ordered a 1990 HZJ73 from Japan. Love the truck, but it's got a substantial lift on it and it rides really rough. We have bad roads in Malawi and you feel every bump, ridge, and pothole. It shakes the whole body of the car and things are rattling like crazy. Given this is really meant to be a daily driver + bush vehicle for getting out on the weekends, I'm hoping there is something I can do to smooth the ride. Lower it some? Diff tires? New shocks/springs? Other things?

    Disclaimer: I know very little about car parts currently (tho hopefully will learn with this vehicle), so please answer back with as little jargon and as much description as you can! It would be really appreciated for this novice :)

    Thank you all in advance!
     
  2. coldtaco

    coldtaco

    Messages:
    2,398
    Likes Received:
    940
    Joined:
    Jul 3, 2004
    Location:
    Anchorage, AK
    Maybe some pictures of the suspension would help. Up close of the attachment points, side views. What size tires are on there? If you are driving on dirt you could let some air out, depending on how fast you are driving.
     
    lazylfarm likes this.
  3. jmylie

    jmylie

    Messages:
    759
    Likes Received:
    169
    Joined:
    Mar 10, 2005
    Location:
    CT
    Short wheelbase truck, will be a bit harsher than a long wheelbase.

    Tire pressure shoud be at recommended settings or a bit lower.

    Grease all suspension points that have a grease fittings.

    Look at your bushings, are they in good shape or do they need replacement?

    Try to find out what lift was used.

    As stated above, pictures would be helpfull.
     
  4. roscoFJ73

    roscoFJ73

    Messages:
    15,896
    Media:
    3
    Albums:
    1
    Likes Received:
    1,886
    Joined:
    Jul 22, 2003
    Location:
    Perth Western Australia
    Japan have some very good suspension manufacturers but they also sold some absolute rubbish. Without seeing what you have , I would start saving. How much PSI in your tyres? I would keep that to a minimum safe level until you can sort something out. We need lots of good pics.
     
  5. TyGuy

    TyGuy

    Messages:
    4
    Media:
    19
    Albums:
    1
    Likes Received:
    0
    Joined:
    Dec 6, 2018
    Location:
    Malawi
    Thanks guys! I’ve uploaded a bunch of pics to check out.
     
  6. jmylie

    jmylie

    Messages:
    759
    Likes Received:
    169
    Joined:
    Mar 10, 2005
    Location:
    CT
    rojjim likes this.
  7. lazylfarm

    lazylfarm

    Messages:
    212
    Media:
    6
    Albums:
    1
    Likes Received:
    207
    Joined:
    Jun 29, 2018
    Location:
    West
    It appears to be an ARB Old Man Emu kit, which is usually regarded as a nice riding lift kit. That said, some people have found they need to take a leaf out of each pack and/or clean lubricate between the leaves. Also, I agree on greasing the shackles, could definitely help.

    Tire pressure? If you are running really high that can cause a rough ride. Age of tires, as tires get more old and wore down, they tend to ride worse.
     
    roscoFJ73 likes this.
  8. GTSSportCoupe

    GTSSportCoupe

    Messages:
    4,778
    Media:
    102
    Albums:
    1
    Likes Received:
    1,656
    Joined:
    Mar 23, 2012
    Location:
    Victoria BC Canada
    I run 20-25psi or so on rough roads. Makes things much smoother! Give that a try. Return to Toyota recommended pressure for smooth paved roads however.
     
  9. coldtaco

    coldtaco

    Messages:
    2,398
    Likes Received:
    940
    Joined:
    Jul 3, 2004
    Location:
    Anchorage, AK
    looks like extended shackles in the front and not in the back. don't know if that would possibly cause a rougher ride. I would say it probably is riding like it should, it is leaf spring set up. I had a BJ-70 and I thought on road it drove quite nice for a leaf spring set up. I now have a ute(pickup) and I don't think it rides any better than the -70. Off road they will be a bit rough unless you can get some fancy custom tunes leaf springs. Have you ridden/driven in other leaf spring vehicles? Did they ride better?
     
    divemedic and SNLC like this.
  10. roscoFJ73

    roscoFJ73

    Messages:
    15,896
    Media:
    3
    Albums:
    1
    Likes Received:
    1,886
    Joined:
    Jul 22, 2003
    Location:
    Perth Western Australia
    I agree with Lazifarm. BJ7* can use the same leafs as 75 series in the front and 60 series in the rear. If heavy duty leafs are chosen, the lighter MWB models will have a fairly stiff ride. Try loading a few hundred kgs into the rear. If the suspension is good, it should ride very nice. But for everyday use it will be too hard. So you may need to take a leaf out of each corner.
    I have OME ARB suspension on my troopy, it appears to be heavy duty and it rides a bit hard without a load in the back.
     
  11. JuanJ

    JuanJ

    Messages:
    1,058
    Media:
    41
    Albums:
    6
    Likes Received:
    466
    Joined:
    May 16, 2008
    Hello,

    I would grease the shackles.

    It appears that the PO did not replace the rear shocks. A common practice it seems: the PO of mine did the same thing. They look like small bore OEM Toyota.

    I would change all four shocks.

    Tyre/tire pressure is important as well. If you drive mostly on unpaved/rough roads, you might want to keep it at around 25 psi (1.7 bar) for a better ride.

    70 Series Land Cruisers are usually hard except when they are loaded.






    Juan
     
    SNLC likes this.
  12. divemedic

    divemedic

    Messages:
    1,127
    Media:
    62
    Albums:
    5
    Likes Received:
    731
    Joined:
    Jan 22, 2015
    Do you know where in Japan it came from? New shocks, new bushings, let some air out. I would only recommend removing leafs it you are planning on not adding bumpers.
     
  13. Indestructible 47

    Indestructible 47 the 40 - the old cattle truck

    Messages:
    852
    Likes Received:
    904
    Joined:
    Jun 23, 2014
    Location:
    Straya
    8 leaf packs in the front is high constant load and will result in a very hard ride. My hzj75 had 8 in the front, rode like it was welded. I have taken 1 leaf out, it was better but i am going to take another out.

    I would load up the rear with a fair amount of weight, and if that fixes it take 1 leaf spring out of each pack. Grease it up first. Taking leaves out is the cheapest option if it can be accommodated.
     
  14. TyGuy

    TyGuy

    Messages:
    4
    Media:
    19
    Albums:
    1
    Likes Received:
    0
    Joined:
    Dec 6, 2018
    Location:
    Malawi
    Thanks to all for the recs. Having it checked out at shop (full once over) today and also asking their opinion. Will make sure to grease between the leafs and do the rear load test to see if I should remove some.

    Will keep ya posted.
     
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.