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"play" In The Driveline

s13-steve
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Missileman Veteran

Missileman

Posted
Posted

Same problem here in an R32 GTR - clunks from the rear when driving harshly, so I put it over the pit and it has a ridiculous amount of play which we isolated to the rear diff. Next, is to remove the centre and get it rebuilt at a shop.

On that does anyone know a good place to go for a diff centre rebuild in Perth?

Do report back what they did to fix it and the cost, I have a similar issue with my R32 gtst.

Mike.

  • 2 years later...
V28VX37 Veteran

V28VX37

Posted
Posted

Resurrecting an old thread.

I'm experiencing some play in the driveline after my recent manual conversion, two different types:

  • There's a slight but noticeable 'clunk' on gear change (clutch-in). This happens most of the time but not always, and doesn't seem to be related to a specific gear or speed. This is the one I'd like to get fixed.
  • There's also slight 'slack' when changing over from accel to decel or vice versa. This feels quite similar to other manual cars I've driven but I'm not sure how 'tight' it's meant to be with an RB25DET gearbox?

I had a look under the car, I could rotate the front part of the tail shaft probably 2mm by hand, the rear part was harder to move. This is with the car in gear and handbrake on.

Which part of the driveline should I look at first?

What's the best way to check the condition of the tail shaft centre bearing?

GTSBoy Grand Master

GTSBoy

Posted
Posted

From your symptom description I would suggest the centre bearing the tailshaft would be #1 suspect.

In reality, I find that it is every single point in the driveline adding up. I have play in the tailshaft, some in the diff, some in the rear CVs and some in the rear hubs. Not enough at each point to be concerned about, but added together they create a hell of an annoying clunk in my driveline.

V28VX37 Veteran

V28VX37

Posted
Posted

Thanks GTSBoy, I'll start from there! I wouldn't be surprised either since the tailshaft is a combination of my R34 sedan rear half and an R33 coupe front half from the wreckers.

Just a couple of more observations from today:

  • There's a slight but noticeable 'clunk' on gear change (clutch-in). This happens most of the time but not always, and doesn't seem to be related to a specific gear or speed. This is the one I'd like to get fixed.

This seems to come from behind the driver i.e. centre bearing, diff, or drive shafts. Centre bearing is currently the prime suspect.


  • There's also slight 'slack' when changing over from accel to decel or vice versa. This feels quite similar to other manual cars I've driven but I'm not sure how 'tight' it's meant to be with an RB25DET gearbox?

This seems to be more in the front side so clutch or the gearbox itself. I reckon it's the latter.

I'm not too fussed about this one but the clunk on gear change is more annoying so need to get that sorted.

  • 2 weeks later...
V28VX37 Veteran

V28VX37

Posted
Posted (edited)

I just checked this again with handbrake on and gearbox in neutral. There's about 8mm of play in the diff, measured on the outer ring where the tail shaft joins the diff. Not sure if this is a little or a lot?

I also did the 'diff test' and opposite wheel rotates the same way when turning so it's definitely is viscous diff. Might be time to upgrade...

Edited by V28VX37
  • 8 years later...
elohim_imanu Contributor

elohim_imanu

Posted
Posted

Most of my play is in the half shafts. What do people do about this? OEM are pretty expensive. Like $1,600 each.

I can rotate a wheel about 15-20mm at the outside of the tyre, is this too much?

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