Heavy Duty Neil
05-14-2008, 08:28
Have an annoying problem with my '04 GMC 2500HD crew 4x4 gasser 6.0/4L80 with floor shift transfer case, about 45,000 miles on it. On the highway at speeds above 60mph in 2wd the shift lever makes a low pitched growl or rattle sound. Seems to do it worst when slowing down from 75 or so to 55-60. Does it in both 3rd & 4th gear. It doesn't make the sound at slower speeds. I've taken the shifter out of the floorboard and everything is tight & clean. Put grease in the linkage sockets and lubed all the moving parts, all other fluids are fresh & full....still growls. Anyone know a fix?