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Clunk coming from spline part of 2 piece driveline.


Daily02
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Hello,

I sometimes get a clunk when going from reverse to 1st. There was on place I found a very small amount of play was the splined coupling where the 2 driveshafts bolt together. I can hear the exact noise when counter rotating the 2 pieces.  The u-joints, differential, and half shafts are all okay. The rubber coupling at the transmission has a few small cracks starting, but has no play.

The question is this a problem, or is a matter of time before the play gets bad enough for a failure?  Thanks!

 

Regards

 

Dono

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1 hour ago, 2002iii said:

If it was me I would be looking for a different driveshaft.

Nuts! I was afraid this would be the case. The nut holding the pieces together seems to be tight, but the driveline needs to be removed for really checking it. If it's tight and the splines are loose...Driveline time: ( Thanks!

 

Regards

 

Dono

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Yes, you need a new spline.

If you don't want to do it tomorrow, Google "GM driveline clunk grease." There are a couple sore spots on GM vehicles where poor spline fit is dealt with with super-heavy grease. If grease will cure trans yoke clunk and steering shaft clunk on an 8 liter Suburban, it might help you out.

  • Haha 1
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2 hours ago, andyleonard said:

Yes, you need a new spline.

If you don't want to do it tomorrow, Google "GM driveline clunk grease." There are a couple sore spots on GM vehicles where poor spline fit is dealt with with super-heavy grease. If grease will cure trans yoke clunk and steering shaft clunk on an 8 liter Suburban, it might help you out.

Thanks Andy! I got serious sticker shock on the cost of rebuilt manual transmission drivelines. The movement is less than you can see. 

 

Regards

 

Dono

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Make sure the fastener is clamping the yoke tightly.

It's possible that it's bottomed out without really squeezing the 

joint tightly.

 

t

likes hardened and ground washers.

"I learn best through painful, expensive experience, so I feel like I've gotten my money's worth." MattL

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11 hours ago, andyleonard said:

Yes, you need a new spline.

If you don't want to do it tomorrow, Google "GM driveline clunk grease." There are a couple sore spots on GM vehicles where poor spline fit is dealt with with super-heavy grease. If grease will cure trans yoke clunk and steering shaft clunk on an 8 liter Suburban, it might help you out.

GM driveshaft splines have a grease zerk where more grease can be easily added.

Clunk grease may help on the 02 for a while but the clunk will return as soon as the grease squeezes out.

A radiator shop is a good place to take a leak.

 

I have no idea what I'm doing but I know I'm really good at it.

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8 hours ago, TobyB said:

Make sure the fastener is clamping the yoke tightly.

It's possible that it's bottomed out without really squeezing the 

joint tightly.

 

t

likes hardened and ground washers.

Thanks Toby! I'm hoping that this is the case. The play could axial. That is why I can't see the movement, and just hear it? Planning on removing the driveline this weekend. The driveline operates very smooth it would be sad junking a good working driveshaft.

 

Regards

 

Dono

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18 hours ago, Daily02 said:

! I got serious sticker shock on the cost of rebuilt manual transmission drivelines

If there are actually  worn splines, rebuilding won’t help,  your core is no good.

Find another driveshaft to spend $$$ on

Edited by tech71

76 2002 Survivor

71 2002 Franzi

85 318i  Doris

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