TB42. How many revs are too many when towing?

[ripper]

G`day Ripper
Check your manual and see where the motor has max toque and drive to that rev range. It will also give you your best economy in that area.

Yeah, I wish I had an owners manual. I've got a workshop manual, but haven't found what I need in it.

OD isn't another gear. It's a solenoid that locks the torque converter so the drive goes strait thru the box. (this is my lamens terms lol)

tappin it

Actually OD and the torque converter lock up are two separate parts of the tranny.
When it's working properly, you can watch the tacho drop when you put it into overdrive, and then about 90km/h it'll drop again when the TC locks up.