check your exhaust. mine slips out of the mount at the back of the crossmember on occasion and ends up sitting on the crossmember. makes one heck of a racket.

I gave up on keeping it in there after putting it back 3 times, I plan to cut the L shaped piece off the exhaust, slide it into the mount, and jack the exhaust up and wld the L shaped piece back on, just haven't had the time

 

It isn't a rod knocking. My money's on the fact your trans mount and/or engine mounts are bad allowing your exhaust to hit on the trans crossmember.

 

Alright, I'll check that out tomorrow.

 

I got it to a shop today, they lifted It up and it was. My exhaust hanger. $15 to weld.

 

You lucked out. Cool.

 

Thats good. As soon as i clicked this post i thought wrist pin. I had a bad wrist pin in one of my first cars, 1976 buick. bought it off back row at dealer ship for $300 cash. I put thousands of mile on that car.

 

Man and I thought it would have been header too, just to be sure check bolts to make sure they are tight. My old CJ did the same thing, cracked header.

 

Go simple and basic first. Always use your own senses to check things out first. Bang on it, look at it.....

 

Did the OP ever resolve his problem???

 

i didnt... but i did seafoam my oil for about the last 150 miles of my oilchange for the first time and it did make the sound quieter... make me think its a stuck lifter or something along those lines... i havent pin pointed it but i know its internal now

 

Check the bolts on the torque converter. If they are run out it will allow the torque converter to spin on the flywheel and sound terrible.

 

Try 5 quarts of 15-40 T3 Rotella and a quart of MMO for 1000 miles. Use a Napa Gold filter.

 

i used to run that... didnt really change anything... i run 10 30 now

 

thats a big job... if i have time to check ill let you know but then i dont know why the sea foam woula made the trans quieter...

 

Not really. Shouldn't take you more than 20 minutes to do...