Metal Grinding when i turn

Alright so i have an 2010 dcsb with a toytec and all in the back, just now noticed from going to a specific store, when i turn to the parking spot it dips down so i dont know what exactly is grinding, well not grinding so much as a metal squeak, but it only happens in that instance, when i turn left or right and hit say a dip or the road slopes down

 

What size tires do you have? Probably your tires rubbing on your cab mount.

 

33's 285/70/18 they only rub plastic this is the first ive heard of it, it sounds like something might be loose i havent really had time but i thought someone could maybe pinpoint it or have had this problem before

 

If your at full lock, tehn its yours steering stops. They just need to be lubed.

 

Yes. Like i said before you just need to grease them.

 

Here is a nice write up on the problem : http://www.tacomaworld.com/forum/2nd-gen-tacomas/11926-steering-stop-cap-write-up.html

 

Can you confirm that tire size? 285/70R18?? That's a huge 34.5" tire and I don't know of any tires available in that size.

I only ask because if that's the size you're running - I'd be very slow to rule out rubbing issues when searching for a new noise.