Tell them that you want the broken pieces for a trophy, then take those parts to a shop that works on 4X4 trucks for an opinion on how it could have broken, it may have been a badly made part
Just a month ago, i had my 2X4 at the dealership to get the complete drive shaft & U-joints replaced, manufacturing defect.
Then i went to a Dyno Shop that does repairs & upgrades the very next day & had a finned differential cover put on, it has a magnetic drain plug in it. Then they filled the rear end with Royal Purple.... NOW here is the kicker, last week i went to the dealer to get an oil change & have a cracked exhaust manifold replaced, when i picked it up, they said that my rear differential fluid needed changing & that it was dirty!!, i had not been anywhere where the road wasn't paved & had driven less than 300 miles since the change to RP. They also said that my transmission needed servicing, i had changed it to RP at the same time as the rear end, i had a COMPLETE fluid flush & the inner & outer filters changed. Everything is still clean under there, so they had to see that everything had been recently worked on, i think they go by what your computerized history reads, not by what a Tech told them
2009 Ram 1500 SLT QC, HEMI , 3.55 axle, Bushwacker flares, soft tonneau, Line_X, DEBO Step, Mag-Hytec, Weathertech mats
2016 Ram 3.0 diesel 3.55 w/LSD, G2 tonneau, Line-X, Weathertech mats, Mag-Hytec differential cover, Nfab bars, CB radio, Autonet wi-fi router, EGR bug deflector