Had a new rearend put in at 4,000 miles because of a clicking and popping sound on take of in forward and reverse. It was quite for about the first 1,200 miles, then it started again. sad thing is when they did the rear change, they left two lug nuts loose, both emergency brake cable bolts, both lower shock mounts, and used pliers on my brake lines so they are all knarled up now. They also forgot to put the axle vent in but i caught that before i drove it home. The "mechanic" claims he torqued everything but i only drove it 30 miles before i heard all the rattleing bolts and took it back. i told him to his face there is no way he did. Well i am asking that an engineer be requested to come and look at it. the dealer said they would request one after verifying the click is still there. Sad thing is I tried to trade to a used tundra and both dealerships only offered me below trade in value because they could not move the titans. anyone got any ideas on what the clicking could be?