For decades Toyota speced 80w90 in rear differentials. It's only in recent years where they're trying to squeeze every fraction of MPG for CAFE reasons, that they have speced lighter viscosities.
80w90 will be absolutely fine. But you might, possibly, get fractionally lower MPG.
I am not a Tesla fan boy by any means. But I checked over the cousins nephews Cybertruck closely, as poor quality and/or fit and finish really bother me. I didn't find any bad panel gaps, or other issues on his. Overall I was impressed.
According to the guy who owned it, anything he used it for was well below it's rated capabilities. So the Ranch use shouldn't have been an issue, or been a factor in the issues it had.
When the Rivian was working, it did fine for tasks he used it for around his Ranch. Lots of power, and he could charge it at home, so no trips to dedicated chargers, or gas stations.
I have 66k miles on my big-bore stroker 1st gen 'Busa. It's proven to be reliable, even at 1600+ CC's, and 285 rwhp.
Your new-to-you V-Strom that has been well-maintained, should have many miles left.
Do you see the house with the solar panels on the roof, in the pic of the Cybertruck bed? The guy who lives there had a Rivian truck for a couple years. He had so many problems with it, that he had to enact the lemon-law, to get Rivian to buy it back. He also went for a ride in the Cybertruck...
I have no idea how long he'll have it. He likes it so far. Or course he's had it less than a week. I thought it was kind of cool, and everything seemed to be working fine.
My cousins nephew took delivery of his Cybertruck, last Friday. It gets up to it's restricted speed of 114 mph (supposed to be 112) mph pretty quickly.
EVERYONE stares and whips out their phone to take pics or video.
I drove it a bit. It's pretty cool. If you can stand being the center of...
Every truck or SUV I've owned, the MPG starts dropping drastically above about 65 mph. Our BOF SUV can get 24 MPG cruising along at 55-60 mph. Push it up to 80+ mph, and you down into the 17's for MPG.
The 4wd Dually diesel can get high teens cruising by itself at 65 mph. Hook up the 26k lb 5th...
The A.D.D. mechanism is part of the front diff housing/assembly, on previous Toyotas with A.D.D. I assume it is on the 4th gen Tacoma, too.
It would be great if a Toyota Engineer elaborated on exactly what failed.