Got the transmission drain & filled along with filter changed, front and rear diff gear drain & fill, xfer case drain & fill, both diesel fuel filters changed.
I supplied the lubricants. The diff covers needed to be pulled and installed back on, no drain plug.
The bill was just over $700. Seems like a lot.
Totally reasonable IMO. Maybe cheap overall today. Factor in reality we've had probably 40% inflation since 2020. About 15% annually.
In 2019 I paid close to that, for similar work (new CV Boot, power steering flush/fill, transmission filter, spill and fill). It was about $825, and I didn't supply any materials. That shop is very fair and honest, but I think 20% higher priced than another shop I use.
Some vehicles are more complex than others. Dropping a tranny pan is not a small task, generally requires a lift. Pulling diff covers is messy and time consuming as well. These are not particularly hard but somewhat labor intensive, sometimes requiring 2 people (double labor charge?). Might be a lift-fee as well.
$700 for labor for transmission and diff, dropped and opened, serviced, fuel filters, etc.. Verdict: Reasonable. Maybe even under-charged in 2023 dollars.