clunk

[testosterone]

i have a 90 with a 5.7ltr..so tonite im driving home from the gym and i notice when i come close to stopping i hear a clunk comming from the front of the truck..brand new tranny with less than 10k miles i would say...i do have a leaky power steering pump..new u-joints too..stock suspension..
help???

 

[Pugsley]

Check your tranny mount, and how tight your crossmember is. Both will cause a distinct clunk when you are coming to a stop. If the mount looks like it has oil or ATF on it, get a new one. Once that rubber has been soaked with oil, it's junk.

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[testosterone]

its not happening this morning...strange..my drive shafts feel fine...mount looks good...guess its one of those flukes eh?
thanks

 

[ftn96]

Play around with your stopping habits and get back to us.
For example, come in sorta hot on the brakes and see if that does anything. then come in nice and easy adn see what happens.
I too have a 90 adn have had some clunks so I may be able to help you out a bit.
My biggest clunk was coming when I came to a full stop under substantial braking force, then once I'd release the brake I'd get a clunk. This was from the slip yoke splines being worn out adn this was causing the driveline to be in a negative bind adn once I released the brake the driveline would un-bind causing a pretty loud clunk.
If this is the case, you can remove the driveshaft and put some grease inside the slip yoke adn re-install the shaft. This will fix the clunk for a temp fix, but the grease will run off and the clunk will come back.
But that may not even be your problem. Let me know if I can help some more.

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[Can Can]

Once again I second Pugs. I had the exact same thing happening with my 84 last year. I was under the truck for an hour twisiting and tugging at everything. Nothing seemed loose..........

. A buddy of mine told me to take a pick handle and give some of the suspension parts some levered pressure and.........VOILA!!!!! The crossmember under the TC was loose, but it would only move around under a lot of pressure(like when the truck shifted weight when coming to a stop).........



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