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Diff locker? or 4wd actuator? (pics)

Discussion in 'Daihatsu Hi jet' started by cottonfarmer, Apr 14, 2008.

  1. cottonfarmer

    cottonfarmer New Member

    ok on my 92 hijet jumbo cab, is this a diff lock that is vaccum operated, or is it a 4wd actuator. its bolted onto the righthand side of the differential and the right hand cv shaft comes out of it to the wheel. When you depress the 4wd drive switch it engages, when you shift the transfer into low range it engages automatically also. have not checked to see if it disengages in certain gears or not. this is on a 92 or 93 daihatsu jumbo cab.

    Hey also heres a pic of the rear u-joint part number off the napa box, they had it in stock. the part number is 410 in case you cant see it on the box.

    p.s. My 97 jumbo cab daihatsu does not have this type of actuator on it? why is that?

    Attached Files:

    Last edited: Apr 14, 2008
  2. greg0187

    greg0187 Moderator Staff Member

    Hi Dave,
    Its more of a 4WD actuator. It engages the front diff when you are in 4WD. Similar to the result of manually locking hubs. I believe it should should stay engaged as long as you are in 4WD no matter what gear you are in. Thanks for the part # on the U-joint. Any problems removing the old ones? On mine it doesn't have any c-clips to hold the U-joint in place, the yoke casting just has some impressions that hold the joint in place after it was installed at the factory.

  3. cottonfarmer

    cottonfarmer New Member

    Greg, My 97 Jumbo4wd Doesnt Have One


    so on my 93 does the front driveshaft turn all the time?
  4. greg0187

    greg0187 Moderator Staff Member

    My 99 does not have one like that either. It does however have one internal to the differential casing (there are two vacuum lines going to it). I tested it out and it just engages the diff.

  5. DRW

    DRW Member

    What you are describing sounds like an axle disconnect system which is what GM has used on it's 4WD systems since about 1989.
  6. myhijet

    myhijet Member

    From what I gather on my 97 hijet, the front drove shaft turns when the rear drive shaft turns. No 2 wheel to 4 wheel shifting in the transfer case like us pickups. 2 wheel to 4 wheel is done by a sleeve collar on the front diff that engages the right axle half to the diff at the diff.
  7. greg0187

    greg0187 Moderator Staff Member

    They must have changed it after b/c the my front shaft does not turn unless its in 4WD. The front driveshaft is engaged by vacuum lines on the transfer case.

  8. woodsrat

    woodsrat New Member

    My 93 Hijet has that very same set-up as the pictures, Some times I have to push the
    4x4 button a few times to get it to engage. Is this normal for the Hijet's? Thanks for the u-joint numbers!
  9. volkswagen50

    volkswagen50 Member

    Sometimes my 4x4 takes a little forward movement to engage the gears. I think it's normal.
  10. TRAX and HORNS

    TRAX and HORNS Well-Known Member

    Guys, check your vaccum hoses close going to front diff. The age of these trucks create small cracks in hoses mainly were hose is at a 90 degree turn. I have had a couple of trucks that would not go into 4x4 because of very small cracks in vacuum lines. One truck would go in and out of 4x4. Sometimes it would get vacuum and sometimes no vacuum. Doesnt take much of a leak. I bought 20' of vacuum line at local parts store. Cheers.
    Damo7 likes this.
  11. 10canmini

    10canmini New Member

    hey guys having similar problem. my rear diff vac can always works but the front is very moody. sometimes it tries to engage but won't. sometimes it works great. i replaced all hoses for front vac can today but still no real difference. any other suggestions if rear can always works but front doesn't?? thanks 10canmini
  12. mitz65

    mitz65 New Member

    hi mine does the same, sometimes it just clicks off, and engages only sometimes. any answers
  13. 10canmini

    10canmini New Member

    after testing front vac diaphram(was working) i replaced all hoses involved with front diff vac diaphram. i then began testing actuaters and found not always getting 12 volts to actuater responsible for front diff. electrical was my problem so make sure you check electrical and not just vacuum.
    good luck
  14. 10canmini

    10canmini New Member

    thanks to greg0187 for the help
  15. woodsrat

    woodsrat New Member

    Thanks, I will have to look into the electrical end and see it it helps.
  16. Skidoobuddy

    Skidoobuddy New Member

    Do anyone know if my 1995 Hijet 4x4 has 4 hi and 4 low? It only has a button to push to put into 4x4.
  17. TRAX and HORNS

    TRAX and HORNS Well-Known Member

    If it does not have a high/low lever between seats its a 2H/4H only.
  18. Buddynut

    Buddynut New Member

    Does or has anyone tried to make the rear diff lock lock in all gears and not only in 1st? Would be more helpful to be able to shift to 2nd and still have the rear locked.
  19. ttc

    ttc Active Member

    never had the need as i only use diff lock in tricky situations. but just bypass the switch on the transmission and you could have it on in all gears.
  20. TRAX and HORNS

    TRAX and HORNS Well-Known Member

    The design is so because the engineers didnt want you to blow the rear end up.
    Unless you are making a rock crawler and moving very slow I would advise not to make it active in all gears.

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