Join Date: Sep 2012
Location: Central Valley, Sierra Mountains, California
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Check the driveline carrier bearing first. Inspect the rubber webbing for damage, push driveline sideways and see if there is movement. If the carrier brg is bad it will shake the cab pretty bad and putting power to it will help it settle down.
When you throttle away from a stop sign you should also feel a sign of it shaking as well. It may be a injector but my truck had the same symptoms your describing and it only needed new u/joints and carrier bearing, and I only had 60K miles on it. 38" tires puts a lot of strain on the driveline and so does pulling heavy trailers, and I drive like a old lady so take a good look at u/joints and carrier brg.
If you do need to replace them make sure to buy domestic gresable parts.
Good Luck with it.........BTW did mine all 3 u/joints & bearing for under $100.00
2006 F250 LARIAT CCSB 4X4
ARP Studs, O-Ringed Heads
X4 PHP 65 HP Custom Tow Tune
Atlas40 or Atlas80 Ficm Tune
CAT EC-1 Coolant, IPR Coolant filter
BPD Waterpump, BPD way of thinking
Fass-125 to a Adjustable Pressure Reg.
Turbo-back SS 4" pipe, Corsa Muffler -7" Tip
6.4 starter, DC Power 270 amp alt
Die Hard Platinum AGM all 2/0 Cables
Fabtech Radius Arms
7" lift w: Icon Progressive Coil Springs
2008 up Carli/Deaver rear springs
All riding on some Fatty-Daddy 38/15.50/18 Toyo's