I've got a clunk in my junk. Please help. 1999 Tacoma preerunner extracab 3.4 V6

[HappyJackGum]

1999 Tacoma preerunner extracab 3.4 V6

I know this is kind of hard diagnosing on the forum without looking at the truck but maybe someone will say "Hey I had that very thing happen to me".
Sometimes when I turn right, I hear loose metal/clunk noise from-it seems like it is coming from under the floor of the pasenger side-up towards the engine. it is a clunk like a very loose piece of metal. it only does it once and just for a moment, and then it does not do it again for 1 day up to 10 days. It always seems to do it when i just start turn right onto the freeway after work. or after my cars been sitting for a while. I thought is was a heat shield poping back into shape, but none of them seem loose. every once in a while it will happen when i turn left, just not as loud. i've seem to be having this problem ever since i had my entire exhulst system replaced (pipes,catalitic converter,muffler). I checked all over and under and I could not find anything loose. my mechanic checked out the car last month and said he didn't see anything loose but did say my rack-n-pinion steering was leaking and needed to be replaced.
would leaking/bad rack-n-pinion steering make a loose metal/clunk kind or noise? I do still have fluid though.

[TuRDle]

Wouldn't hurt to check xmission and engine mounts. Never happened to me but my son said that what he thought was ball joints was diagnosed by dealer (under warranty) for a Tundra as loose mounts. They said it was common.

[willdeau]

If you're sure it only started after the exhaust was replaced I wouldn't go spend much time looking else where. When a noise starts up just after a repair, guess what? It's usually the repair.

Did you go from the cat to the engine?

[Sykostick]

Is it tame turning or are you hard to the right/left?

[burger]

Check brake caliper bolts and make they are tight

[new echo owner]

How about the steering stops? Did you check that and put some grease on them?

N.E.O.