1. Welcome To GMTruckClub.com!

    The #1 Chevy Truck Forum Online
    Online since 2004, we are the #1 Chevy Truck & SUV forum and user community. If you have any questions about your Chevy or GMC Truck, SUV or Crossover, or just want to connect with other GM owners and enthusiasts around the world, you've found the best place on the internet to do that.

    Join Today ~ It's Free
    Registering is Free and Easy! Hope to see you on the forums soon!

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 2 Years ROTM Winner 1000 Posts

    Does that truck have a mid-shaft bearing? I have seen those things cause all sorts of crazy vibration issues. I had a cracked u joint strap in the rear but it only vibrated between 35 and 38 mph, When it got worse it vibrated all the time.
  3. 08_rado_rocker

    08_rado_rocker Member 2 Years 500 Posts

    Makes sense.. i haven't yet gotten underneath him to check and see if anything was loose, as i am only actually in possession of him 5-10 days a month lol. but that's something ill have to check! thanks bud

Share This Page