This is what my service manager told me about the Transmission Service.
They don't drop the pan when they do the first (60,000 mile) transmission service. It's only a "TransFlow" flush. They hook up the machine and pump fresh fluid in while the old comes out. The machine is calibrated to detect junk in the fluid. If the flow rate isn't high enough to do a transmission flush the machine automatically shuts off and alerts the technician to drop the pan and inspect. At the following service (120,000 miles or 60,000 miles from first flush) they will drop the pan regardless and replace the filter/screen. Or at least they should. My first transmission service at my GMC dealership was able to pump out and replace 8.8 quarts. Shifts were like butter when I picked it up. I am a fan of the process and trust my service crew. They go above and beyond for me. Master Buick GMC, in Augusta GA.
They don't drop the pan when they do the first (60,000 mile) transmission service. It's only a "TransFlow" flush. They hook up the machine and pump fresh fluid in while the old comes out. The machine is calibrated to detect junk in the fluid. If the flow rate isn't high enough to do a transmission flush the machine automatically shuts off and alerts the technician to drop the pan and inspect. At the following service (120,000 miles or 60,000 miles from first flush) they will drop the pan regardless and replace the filter/screen. Or at least they should. My first transmission service at my GMC dealership was able to pump out and replace 8.8 quarts. Shifts were like butter when I picked it up. I am a fan of the process and trust my service crew. They go above and beyond for me. Master Buick GMC, in Augusta GA.