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clunking

This is a discussion on clunking within the General Help forums, part of the LSx Technical Help Section category; this post is probally in the wrong section and if it is im srry...i have a 99 camaro z28 auto ...

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    clunking

    this post is probally in the wrong section and if it is im srry...i have a 99 camaro z28 auto tranny when i put it into gear i hear a clunking noise from the rear end and when coming to a stop when the tranny down shifts from 2 to 1 it makes a clunk/pop noise out of the rear end it sounds like....any ideas?

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    Your dealership guy konigandy6's Avatar
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    Quote Originally Posted by vbcamaro89 View Post
    this post is probally in the wrong section and if it is im srry...i have a 99 camaro z28 auto tranny when i put it into gear i hear a clunking noise from the rear end and when coming to a stop when the tranny down shifts from 2 to 1 it makes a clunk/pop noise out of the rear end it sounds like....any ideas?
    GM considers this a normal condition. We see it more in full size trucks but basically what is happening is the driveshaft is moving normally in the tail shaft. The years have caused the lubricants to dry out so the yolk, while moving the same as it did before, just makes noise. Change your rear end fluid and lube the slip yolk and you should be ok.

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    so if i lube the slip yoke it should make the noise go away....also ls1tech people where telling me that it could possibly be my tranny mount or something like that

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    its normal really, just check it now and then for play, and keep it greased up! ive seen some silverados driveshafts snap in two.

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    Your dealership guy konigandy6's Avatar
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    Quote Originally Posted by vbcamaro89 View Post
    so if i lube the slip yoke it should make the noise go away....also ls1tech people where telling me that it could possibly be my tranny mount or something like that
    That is another possibility... Don't count it out but start with the drive shaft and work your way in.

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    ok thanks for the help.....kinda sux that is normal its annoying

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    First check your trans mount. That will cause clunking if its broken or severely worn out.

    Check your u-joints in the driveshaft as well. Make sure they don't have any play in them. If everything checks out, the noise is probably originating from the axles. Wear and tear on the rear causes the axles to become loose in the carrier, so that there is play between the splines of the axle and the splines in the carrier. This can cause the clunking noise that you are hearing from the rear. Not much you can do about it, seems that its common to most 10 bolt rears in both trucks and cars.

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    Veteran 0rion's Avatar
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    the trans mounts are famous for going out.....I'd definitely check it.

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