Transmission Fluid Change 2000 Mustang GT Manual

Simply jack the car up, and pull the bottom plug on the case. It will say "DRAIN" next to it. Let it all drain out. If you can refill it through the "FILL" plug, do that. IF you can't reach it....just pull the shifter out and fill it through the shifter. I fill up mine on level ground with the fill plug out. When it leaks out, I stop, let the dripping stop, then put the plug back in. Then silicone the shifter area and drop it back in.

I use regular ATF. If you want synthetic, that's up to you.

Are there any benefits/drawbacks to using a synthetic?

(ie. benefit of longer life, better gear protection / drawback - too slick for the synchros to work properly)?