1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Front driveshaft woes

Discussion in '80-Series Tech' started by hobbes, Jul 13, 2005.

  1. hobbes

    hobbes SILVER Star

    Messages:
    633
    Likes Received:
    131
    Joined:
    Feb 2, 2002
    Location:
    Naples, FL
    I've been fighting some vibration problems on my 1997 Cruiser (its in an older thread). Today I took my front driveshaft to a driveshaft shop that's fairly reputable for balancing. The guy noticed two u-joint caps were rotating in their yokes. Specifically one in the sleeve yoke (front piece of the shaft) and one in the flange yoke (rear piece that attaches to the transfer case). It was very appearant as he rotated the u-joints. Both the caps are in line with each other, which makes me go hmmm. He asked where I bought the U-joints (CDan) when I told him they only have a couple thousand miles on them. He said since they were Toyota (they've had problems with other brands) they should be fine. All of this led him to tell me that I need to replace the sleeve yoke (if I can get it) and the flange yoke but the U-joints themselves are probably still okay. He said it's very unusual to see this on a Toyota since their stuff usually lasts.

    The truck had 102k miles on it when I replaced the U-joints. The old U-joints were pretty dry and one had a small hitch in its rotation, but they didn't seem that bad (proabably never greased before I got to it at 90k miles). Assuming I didn't butcher the installation job too bad (everything seemed to go okay), what would cause this? The fact that the caps that rotate are aligned makes me suspicious. I don't want to replace everyting to find out that something else in the vehicle is causing the wear (seems unlikely). For the record, I still have a vibration at 55 mph with the front shaft removed but its significantly reduced (rear shaft as well?).
     
  2. elmariachi

    elmariachi

    Messages:
    1,977
    Likes Received:
    23
    Joined:
    Jan 4, 2005
    Location:
    Shufflin' Through the Texas Sand
    Well that's great...your brain is okay Mr. Jones, but your skull is destroyed beyond repair. Were the caps loose in the yokes 2000 miles ago when you had them serviced? I cannot imagine what would cause enough slack in a yoke that a u-joint cap could slip around. EVERY 4wd u-joint I have ever serviced required some effort to get the caps out, much less them being sloppy loose. I'd confirm with Dan about the u-joints being correct. Maybe you can source a used driveshaft at www.car-part.com.
     
  3. hobbes

    hobbes SILVER Star

    Messages:
    633
    Likes Received:
    131
    Joined:
    Feb 2, 2002
    Location:
    Naples, FL
    I did the servicing myself and don't recall them being loose. It is possible I missed it. Seems like they all fought a bit going in, like I'd expect. Is there anyway to tell if the hole has gotten bigger (vice the cap getting smaller)? I don't see any specs in the FSM for the hole. I'm starting to think about getting another ujoint to see how tight it is.
     
  4. elmariachi

    elmariachi

    Messages:
    1,977
    Likes Received:
    23
    Joined:
    Jan 4, 2005
    Location:
    Shufflin' Through the Texas Sand
    They should be tight enought that you need a press or vise to slide them in and out, and not loose enough to cause what you are describing.
     
  5. Tools R Us

    Tools R Us

    Messages:
    22,089
    Likes Received:
    3,580
    Joined:
    Jul 20, 2004
    Location:
    Chandler, AZ
    It's possible to "shave" the bore by driving the cups in slightly crooked.