I had recently had Jiffy Lube performed a transmission oil flush/exchange on my company van.
I was wondering if a similar machine is used at the dealerships for flushing the transmission oil ?
It seems quick and simple compared to dropping the pan and worry about the possibility of the gasket leaking when reinstalling it.

What is your opinion?

 

you don't want to flush a 722.6
and you need to change the filter(autohausaz.com)
and your 99 has a torque converter drain so you can get almost all 9 liters or so drained.
valvoline maxlife is nag1 approved.

 

The tranny pan gasket isn't prone to leaking. As long as you go with an OEM one you would have to screw something up to have it leak after you re-install it.