[RyanAK]

Page 2 and no picture. That’s probably against forum rules...

Got the three u-joints replaced and that reduced the “body boom” by about 80%. I didn’t attack the double cardan CV joint on the front axle. Seems tight, but it probably needs gone through. Also, we don’t have a driveshaft shop anywhere within 2 hours, so I didn’t balance the shafts. So the last 20% might be the CV or a shaft slightly out of balance?

Or maybe these square Suburbans are huge, cavernous echo chambers and a certain amount of rumble is to be expected without doing some sound deadening?

Anyway, the annoying “body boom” has been significantly reduced and I can concentrate on all the other noises a 41 year old truck makes. It rumbles pretty good at 65... I need to be able to drive on the interstate at speed now and then. Anyone have suggestions on things that appear at higher speeds? Should I be ok driving 70 with an unconverted NP203 in full-time 4wd? With the 29” stock-size tires the RPMs are spun up pretty good.

Here’s a pic...