I'm not versed on all of the differences, but the early Gen 3 comes with a 3.5, and the later Gen 3's in the USA came with a 3.8 and traction control.
There are likely more differences that I'm not aware of...
When was the last time you changed the fluid in the transmission?
It sounds like it could be the torque converter.
My rig did this when I first purchased it with under 30k on the clock.
After completing a fluid exchange (not just a drain and fill), the issue never occurred again.
Daily driving with 35 lbs is fine with E rated tires (when unladen on a half ton).
Experiment with the pressure until you find your desired comfort level. Check the contact patch using the good 'ol fashion chalk method.
The E-loads will definitely hold up well in the rocks.
Glad to see you're getting out into the bush!
Bummer about the fuel leak. I had the same issue quite a few years back while wheeling in Plumas NF.
We were solo on that trip, so I was worried to say the least. Factory recall on the leveler was honored by the dealer when I returned.
I fabricated a mount quite a few years back, and it's still working flawlessly. Below is a thread where I posted what I did...post #14 and #31.
Nice work on the Jerry Can holder!
How did you attach it behind the spear? Dose it "clamp" between the tailgate spare tire mount and the spare? That's how I mount the fuel carrier on my Gen III and its working out well...no issues, and many miles of tracks on it.
Sorry to hear about the situation.
I had a similar situation in '92 while traveling in Central America in a Toyota pickup. We broke a leaf spring and rigged the suspension to get us back to the pavement. We then found a local shop that "custom" made our broken part. Since he didn't have the...