This is my first 4WD vehicle so I'm still learning what to expect. I'm sure the manual 4WD's will make different noises than a electronic 4WD. When driving in 4WD, should be there a little extra noise from the transfer case? Kinda like a rubbing type noise? It's hard to describe.
During turning? Yes. The clunk you hear could be multiple things, none of which are probably an issue. My 08 clunked when I switched it into 4x4. I haven't heard it from my 2010 yet, but I haven't really listened either.
1969 Chevy RCLB C10 350/TH400 SOLD
2007 Chevy RCSB 4.8 4x4 LS SOLD
2008 Chevy RCSB 5.3 4x4 LT SOLD
2010 Chevy CCSB 6.2 4x4 LT SOLD
2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
2013 FORD CCSB F350 6.7 Powerstroke 4x4