TB42. How many revs are too many when towing?

[ripper]

Well after lots of reading here and elsewhere, I decided the extra revs probably would be fine.

On the flat straight parts of our recent trip with our caravan(only 1500kg), the trol easily did 95 -100kp/h, which is about 2500rpm with the torque converter locked up in 3rd gear.

I worked out I was pushing it too hard in some of the hilly sections, because the trans temp warning light came on three times as I reached the tops of hills. I pulled over straight away to let it cool down, and it only took a few minutes each time. After that I kept the revs under about 2600 rpm going up the hills, and it didn't get hot again. Made it a bit slower, but most of the hilly section was dual lanes, so we weren't holding others up.

When we got to Canberra I drained the auto and put new fluid in. The old stuff looked okay still, but better to be safe than sorry.

I'm going to move our trans cooler to where it can get cooler air, and hopefully the warning light wont come on again.