2 piece tailshaft question

Discussion in 'Technical' started by Melkor, Nov 7, 2016.

  1. Melkor

    Melkor I want my Z back :(

    Hello All,

    i have a 89 300zx twin turbo without a motor that i need to move from time to time.

    it has only the 2nd tube of the propeller shaft in it as the 1st tube is attached to the gearbox still. Consequently if i move the car, the prop shaft rattles around and could damage the underbody of the car, or the prop shaft itself.

    I have tried removing the 2nd tube from the diff, but it is bolted on with allen keys and i don't seam to have the correct size allen key to remove it.

    I had a look at the service manual and looks like they should be 'normal' bolts, and not allen head. Does anyone else have allen head bolts and know what size they are? I have tried both imperial and metric, and non of the standard sizes i have tried feel right, all either don't fit or are to sloppy.

    next question, if i cannot remove it (till i get it up on a hoist and can access it properly, with plenty of room) can i attach the center bearing to the 2nd tube only and use that to keep it in place?

    I'm thinking i will replace the prop shaft with a 1 piece anyway when i finish the motor rebuild, so i am going to have to remove the 2nd tube eventually.

    any suggestions?

    Cheers

    Tony
     
  2. syntax_X

    syntax_X Zed Head

    Just hold it up with wire for now .
     
  3. Melkor

    Melkor I want my Z back :(

    I did try that with some rope, but it still hits the tunel.. plus the the rope got caught in the uni, and because of how i tied it on it pulled the handbrake on, not one of my proudest car moments...
     
  4. syntax_X

    syntax_X Zed Head

    Ah shit, well you know what they say if it's gonna get caught on something it'll get caught on everything!

    Center bearings fine to use if you can.
     
  5. Martin Williams

    Martin Williams Well-Known Member

    All twin turbos have 8mm Allen key headed bolts. NA come with normal Hex bolts. Surely someone will lend you an 8mm Allen key, OR if worse comes to worst you could buy one!
     
  6. Shane001

    Shane001 Well-Known Member

    Yep 8mm allen key standard bolts for TT.

    Or yeah connect up and bolt the centre bearing back up.
     
  7. Melkor

    Melkor I want my Z back :(

    Awesome, thanks for the info, i did try an 8mm, but it just felt a little sloppy, i might go get a new one, all my tools are Stanley, so not the worst, but not the best by far. I may even see if i can find a 8mm hex socket to go on my impact gun or rachet, or is that a bit a bad idea?
     
  8. Shane001

    Shane001 Well-Known Member

    An 8mm hex socket is definitely the way to go, you'll need that to torque them back up correctly. I'd be careful using an impact gun to undo them though.
     
  9. Melkor

    Melkor I want my Z back :(

    i thought impact gun is better, as you are less likely to bend or twist the head of the bolt because its lots of little impacts, stead of one bit twisting force, or something along those lines.

    But yes, making sure the socket is properly seated and securely on the bolt before trying to undo with an impact gun, should be a standard thing anyone does... but i have far too many rounded bolts from improper use.
     
  10. Shane001

    Shane001 Well-Known Member

    Exactly :D
     
  11. FireHorse

    FireHorse Member

    Glad I read this... preparing for a NA subframe swap into my TT and just realized I don't have bolts to connect the driveshaft to the diff (was going to use the ones currently in the TT)

    Can anyone tell me the correct size?

    I got a bucket of bolts I am sure I can find something suitable but for this I would rather make sure I have the correct item
     
  12. Jinxed

    Jinxed Moderator

    the tailshaft is different as well.

    if you are swapping differentials, the diff, tailshaft, bolts and number of bolts is different.
     

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