i dont think one could create a 4%+ difference in overall circumference from rear to front with air pressure. i would not worry about drive train damage because you have x amount in the rear and y amount in the front. if anything you would notice uneven tire wear before you have damage to the diff.
Sure. But I was more curious about the size of the contact patch than the circumference.
I have aired my rears down to 41.5, but judging by the fine dust in my parking area picked up by the tread, there is still quite a bit of difference between the fronts and the rear. The dust hasn't fully covered the entire tread edge to edge yet, the way the fronts do. I will keep airing them down step by step till I get the dust to cover the entire tread inside to outside edge, mimicking their edge to edge reach on the fronts, and then see what that PSI number comes up to.
The above process of matching fronts and rears contact patches with dust would be sort of my layman's way of figuring out the correct rear PSI for the Normal load.
And could it be that the Normal and Full load is now being referred to as the "Light load" and "heavy load" that my MY16 handbook is talking about on its page 240, under a Warning heading:
So tell us Tata/LR, what is that "Light load" setting that you are referring to here? Do you have a recommended PSI number? Or is it that the 43 PSI is your Light load setting? Is it? No? If it is not then what would be your recommended light load setting? And if it is, then what would be your Heavy load setting?
Would your lawyers have the answer, Tata/LR?
Or could it be that being as lazy as you have become over these last few years, this warning paragraph is a carryover by mistake from the older model years and you just did not bother taking it out from your documentation much like you did not bother to update/correct other sections of the handbook like the Tow Hitch/towing section which still carries a few versions old, outdated but "required" measurements for the tow bar, confusing the hell out of your inexperienced customers who actually are trying to stick to your recommendations by purchasing your "Land Rover Approved" overpriced but very cheaply packaged tow bar with a leaflet in its box referring to a different set of measurements. ha. And no supplements with handbook or any other attempts or means to clarify things either.
Since you are pretty strict about your "required" specs in this case, with the fear of going off spec and causing possible damage, something that should have been as simple as going to the dealership and picking up the part, it took pretty much a couple of days of my time to research, online search looking at older version of your tow bar set and by physically measuring bars at U-Haul and at your dealership to figure things out as to why things are not matching up and who/what documentation to believe in and who/what is correct because you know what your dealer' response about towing was, Tata/LR?
Without the slightest exaggeration, this is exactly what your "well-trained and qualified" personnel at Parts and Service had to say: "I have no clue."
Just ridic.