i have many blazer but lately i been driving in my 4 banger s10 and it recently snowed here in ny and my s10 got stuck many times it was sad. so i have a pair of blazer wheels sitting around and there 30 inchs all terrans and the s10 stock are 27. so i put the 30's on only in the rear and the first problem was it was hitting a parking break mount so i heated it up and bent it now the only other problem is the wheels are like a mm away from the leaf srpings.

soooooooooooooo.....
when i drive ina straight line everything fine but any turn clanking from the rear almost like it from the diff
my only thoughts are they rubbing the leaf spring when the body rolls ? anyone know anything or have a better idea

 

Take those wheels off, put a different pair on and see if the noise is still there, if not, its the wheels hitting something.

 

I've had them off I know the different rims have a different back spacin but the noise is so loud and sounds like the diff I want to know what the problem is specificly

 

I think maybe with the body roll the wheels rub the leaf springs on a turn and mess the diff up some how

 

Well if you take off the tires and put the regular set on, and the noise goes away, you can rule out the diff.