Got rid of my voyager because mines was no good for towing. It may have been an underlying fault/issue with the gearbox. I'd had the fluid and filter changed nd it made no difference. Even with an empty towavan on the back, it would kick down too readily trying to maintain 50 on the flat. I got the temp creeping up when going to Cornwall, up a couple of the big long climbs, but it settled again once on the flat/downhill. That was with 1600kg on the back.