My boss Hass a 455G stuck at a site. We have tried to move it but, it gets a light on if we try to move fwd or back, he said in the past he had changed the filter and it started moving again, he wants me to Change the transmission fluid, I moved the bucket all the way down so I can get under it, but can't seem to find the right drain plug, took off panels under but see where the dip stick is up above when I'm on top, and am unsure where to drain the transmission. Could anyone help me with this, also what kind of fluid goes in the tranny on the 455G. Thanks for any help you can give me!!!! Crash........