Well he is the short of it. I added a 4" superlift springs about 10 months ago. Then recently I added 1.5" blocks in the rear to level the truck out. After this, there is a noise coming from the back of the transfer case when I let off the gas. The 4x4 shop said just lower the transfer case. My truck is a 88 so it has the spacer under the cross member. I was just going to put the spacers above the the cross memer. My problem is the front y-pipe of the exhaust is almost hitting the front driveshaft already. If I move it anymore I will be in trouble. Does this mean I have to convert to dual exhaust with dual converts too. I am under emission laws. This is pretty costly fix for dropping the t-case. Thanks for your reponse ahead of time.