[Welcher774]

I have seen both done. When I was in the shop if the vech had less than 100k would do a flush mait only. If someone came in asking for flush would quiz as to why they asked. Questions like any shifting issues, noises,etc or for maint. Would explain it is a maint only service. NOw if the pan was leaking would change the filter and gasket.

If the fluid was burnt smelling and really dark without having service done would not suggest flush. The flush machine uses the truck trans pump'to pull in nee fluid while it pushes out the old. If a lot of junk in the fluid it is possible to have issues afterward. Hope this helps.