Is there a TSB for 4wd front diff howl

The truck is due for the 20k and want them to check the howl I get when it is in 4wd only going about 20-25 mph. Sound is coming from up front. Is there a TSB I can print and show that to them to check on? Also what is the TSB for the brake vibration when slowing down in the rear? Thanks you my taco freinds

 

Sure its not the lower control arm holes howling?

 

Yep only happens in the 4wd. Sound like the front diff

 

TSB's aren't check lists, you have to have a valid complaint and they will look into it.

Some dealers will charge diag if there is no validity to the complaint.

Just bring it in for service, and let them know of your concerns.

 

This
Many dealer service shops are much more responsive to fix an actual complaint, and are usefully not so, when someone comes in waving an instanetz list of perceived free work in their face. If you have driveline noise and/or vibrations, just tell em. It doesn't hurt to do your research, but just tell them your woes.