If it were a non-flex, then they only change the oil every 12months, or 10k miles, whichever comes first. If op's truck is non-flex, then I could see them not changing it, but the rest of the service, tire rotation, etc, should have been done. In my region it is all flex, so I forget. Most Tundra's are flex it seems. Stupid gvmnt.
Your diff drop has nothing to do with the drive shaft carrier bearing drop, which that is where the shudder comes from. Dropping it with 2 5/16 thick plates on each side stopped my shudder on my 2010, my 2017 I haven't done anything with yet. It's there, but I know what it is.
As for the cameras, when a truck comes in my shop and is recording, we leave it alone, and tell the techs around to watch what they say. We respect peoples property no matter what, but we also like to talk shit to eachother, and some customers wouldn't appreciate the banter about how someones wife must be tired from the night before, typically the response is something like "We went to bed early, she wouldn't give me any..." and then the next response is "well, she didn't say no to me..." etc.
Shop talk is normal, just we make sure it doesn't happen on cam.
If the cameras were set to ignition, if they didn't start it to change the oil, and didn't start or move it to do rotation, then it would not have been recording, unless they disco'd the cameras before starting, which would be odd. Unless they have a policy about it, in which case they should tell you, especially if you ask.
I have had to disco a breathalyzer, and some other equipment once that was just so badly rigged that it had to be disconnected for safety. But camera's we will let em roll.
I have had issues with service, one oil change that was either not done, or done on a cold drain, or had improper weight. I leaned to improper weight. They re-changed it, no questions asked. I have had more issues than that. But I have a great relationship with my dealership and the service manager now. One huge issue, they made it right. I drop gift cards for lunch sometimes. It's cheap, $25, I have a stack of unused ones too that I can just randomly hand out as I won't use them. Still gotta drop one for the last service. I help them with other stuff too, they know me by name when they see my truck, good or bad. I have gotten a couple of free alignments by their master tech. Only the master tech is allowed to do most things on my truck, including the service.
Maybe a sit down with the service manager is due, or find another dealership and have a sit down first and explain your issues. They can't re-do the service if the first dealer billed yota for it however. But might be good in the future.
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I put the Laughter in Slaughter, and the Fun in funeral.
KTM 450xc QUAD, Baldwin head, Ti valves, 8/06 cam, motoworks, goldspeed tires...
Gone/not forgotten: 2010 CM RW that was sweet,
NOW: 2017 Platinum. Tinted, trd duals, Exo Grapplers. Led h-lights and interior, Hard hat tonneau, line-x, Rancho uca/level'd
I like weapons. I dont capitalize, use spell check, or punctuate properly...
and you can call me Power.