Severe Vibration 40-30MPH

[CanadianDiesel]

Hey guys, I have a pretty strong vibration that shakes the whole cab on decel, only at the 40 to 30 MPH speed, and only on decel.
Tires, wheels, brakes have been ruled out.

Any thoughts?

[chris'2000psd]

does it happen in 2wd and 4wd, with or without hubs locked, trying to rule out some areas.

[bob harris]

Drive shaft bearings ?

[CanadianDiesel]

4x4 ruled out, does it with hubs locked or unlocked, 4x4 engaged or disengaged. Gets worse the colder it is outside. Hanger Bearings
Replaced a couple years ago...drive shaft U-Joints maybe? Everything seems tight when I check for play in drive shaft...

[nodd89]

No idea...but that is a sexy truck is it a longbed? Got more pics? Before/after shot ? My whole truck needs a paint job and I know blacks a lot of work to keep looking good

Sorry to go off topic

[CanadianDiesel]

Originally Posted by nodd89

No idea...but that is a sexy truck is it a longbed? Got more pics? Before/after shot ? My whole truck needs a paint job and I know blacks a lot of work to keep looking good

Sorry to go off topic

Haha thanks a lot man, yeah she's a long bed. Here's a few pics.
how i bought it in '08:



Hardly anything on my 99 is original...

[CanadianDiesel]

As for this topic, it completely boggles me. Vibration pretty much gone now (temps have warmed up to above 32F lately) but I expect it to come back when temps dip down to around 0*F... I'll have some updates. Thanks for the help guys

[Pierre c]

its your hanger bearing....mine did same thing, only happened on decel (when i had my foot off throttle) changed bearing and problem solved!

[Pierre c]

Absolutely love your truck BTW!!!!!

[CanadianDiesel]

Originally Posted by Pierre c

its your hanger bearing....mine did same thing, only happened on decel (when i had my foot off throttle) changed bearing and problem solved!

That's really good to hear man! I'm hoping it's that, cause its pretty bad now... Does anyone sell Greaseable hanger bearings for these? as this one was replaced 2 years ago...

And thanks for the compliments bud!