:r well I guess I'd better recant all my statements about overdrive before someone blows their tranny and comes back to me mad. You folks have changed my opinion on this subject :o and I'm in complete agreement with those who said to check the owners manual, butttttttt I've had 2 toyota trucks and other than discussing weight
they never said anything about not towing in overdrive. The first one I had I sold with 168000 miles on it and towed maybe 1/3 that with different trailers and put the tranny in the same place ("D") I do when I'm not towing. never a problem. I'm towing with a Tundra now and I put it in "D", it knows when it has to shift down with none of the hunting you folks are mentioning and it shifts back into overdrive when it figures the going is ez. Some trannys have a separate position on them that says OD and those must be the ones that won't take it.