Shop is afraid they might be “married” to the vehicle. There’s a chance of problems for a first time fluid change with that many miles.
Might want to talk to some other shops and see what they say
Did mine with the PPE pan and Mopar Fluid at 126,000. I tow a medium trailer about 5,000 miles a year (2 axles 7.5'x30' long enclosed, empty 3500LBS fully loaded 6680LBS). My dealer would do the job but we all know that is not cheap... Called a trans shop, they said no problem, but I ended up doing it myself because an friend offered up his lift.
That was in December. I did not notice any shifting issues prior to the change and no difference after. I have about 2500 miles since then with 0 problems. 1000 of those miles was pulling my trailer.
Gero:
Geez do you drive a pickup or an suv? Look how clean that bed is
I have the Bedrug liner in my bed. I love it! Its technically plastic like the fuzzy side of Velcro tape. So it cleans very easily. It feels like carpet and has padding. It great for going to the drive-in movies. Hualing breakable items or thing you don't want scratched etc... At the same I have thrown and engin in there, loads of wood, snowmobiles etc. While it does clean up very easy, if I'm hauling something I know is going to make a mess I will put down a blue tarp. It's just less clean up in the end. Had a friend years ago the had a bedrug in a truck with no cover on the bed. It held up to everything he did with it including the weather elements, all four season of weather.
Only thing that can be a pain to clean out is wood splinters for split wood. I definitely use a blue trap when hauling wood for camping but I check over the carpet to make sure there are not rogue splinter stuck in the carpet nap afterwards.
I had one in my last truck too and will get one for the next truck. Spray in liner would be my next choice. The truck I bought for my son has a spray in liner. Since I have both available for use I obviously can now choose to use his for dirtier applications... But I will say hauling wood in his truck still leaves a mess to clean up. There are scuff marks, of course they are just cosmetic, but I have to have then cleaned off.