Clunk,clunk,clunk when punchin go pedal!

[Heavyjp]

I guess the subject says it all. When I accelerate there is a clunk like somethings loose. My first guess was the U-Joints! Am I right?
What else could it be?

[tuckers89GW]

does it clunk when only accelerating hard? could be loose chain in the transfer case. IF so, get it fixes ASAP. You don't want to have to buy a new t/c. they aren't cheap.

[Stuka]

Well, 84 should have a NP229, and if I recall correctly it doesnt use the chain in 2wd. Only in awd/4wd. But I would still check it. What general area does the sound come from? And can you feel it thoruhg the truck?

[91waggy]

could be the motor mounts or the tranny mount

[Heavyjp]

You know what? It may be a loose mount, but it wasn't doing this a few weeks ago. BTW I can't get her to go back to 2 wheel drive yet. SO, I'm in 4 and if it only happens in 4 then that might be it too. I hope it's not the x-fer chain. I'm more busted than Buster Douglas right now.
On a good note: the junkyard bought 2-barrel I threw on is doing pretty good. I just gotta change teh electric choke which I found broken today with loose linkage. Now, If only I could take care of this crack and exhaust leak on the passenger side and the exhaust leak messin up my gray painted valvecover on the drivers side.