Truck Norris (08 1/2 ton 5.3 w/4l60 &g80) Vibration in 2nd gear.
Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by
08_rado_rocker, Mar 28, 2012.    1. 08_rado_rocker
08_rado_rocker Member 2 Years 500 Posts      Alright, as the
title says I've got a strange vibration when under a load (aka
normal driving... aka 3/4 throttle or more lol) but ONLY when
reaching the 4000 rpm mark and then it continues until the shift
into 3rd and disappears.      This started happening as soon as
I dropped the truck basically and obviously it is bothering the
heck out of me..      I am kind of stumped as to what could be
causing it, because (correct me if I'm wrong) a u-joint, off-
balance driveshaft, or anything of that sort should be
consistent throughout the entire gear span shouldn't it?
Just curious if anyone has had this same issue or not before? I
couldn't find anything already in the forum.   2. Pikey
Pikey Moderator Staff Member 3 Years ROTM Winner 1000 Posts
Does that truck have a mid-sha