Just did a 4/6 drop on my 07 classic crew cab and it has the 1 piece driveshaft. Do i need to swap it to a 2 piece shaft? I have heard of people having issues of it hitting the bottom of the cab. I have driven the truck a little and dont seem to be hitting but it seem to be one of those things what if it hits then its to late. Id like to take care of it now before i find it being a issue if i need to.

 

Do you have any pictures?
Is it close to hitting a cross member?
Can you cut/clearance it?
I had to cut quite a bit out of my 2dr Tahoe for my 5/7 drop. Every cross member was notched to clear my drive shaft.