Discussion Starter · #1 ·
I have a 2003 gmc 2500HD LB7 4wd with 290k on it. Recently I've noticed it "jerk" for a split second only while cruising the interstate. The transmission fluid looks great and smells great. I took down the pan to change the inside filter along with the spin on filter. Everything looked good on transmission side. I've read that a transfer case might cause my problem. So I checked the transfer case fluid and it was black, but full. Went ahead and changed it. So my question is... Is it possible that it is in fact the transfer case? If so, what do I look for as culprits when I take it apart? Thanks!