The important thing is to get the torque converter to lock up in 4th gear...Even though you switched gears, your 35" tires put your overall gear ratio right back to a Titan with stock tires and no tow package gears...I move my TT today for the first time at highway speeds and I had a hard time deciding what gear to tow in. Towing in 4th the RPM is at about 2200 @ 100km\hr and is okay on flat ground until I get to a slight incline the the truck slows then I have to manually shift to thrid and all is well.
I then tried backing my speed down to 90km\hr and keeping it in third with my RPM at about 3100. It seem to feel alot better this way but I'm just wondering if this will have any negative effects on my tranny, fuel economy (4th vs. 3rd).
It doesn't make any difference in what gets posted, you already bought the trailer, went with 35" tires even though you knew you're going to tow real heavy....So tow in 4th, and drop to 3rd when needed and visit the gas stations often...:cheers:
BTW - The Toyo's should be at least "D" rated, so no issues with those....other then they're to tall for good towing power...:gunz: