LMAO.
Ya ya ya. Gears etc must match.
This is true.
No. I'm not sticking a big ass dually diff in my 1500.
But also in reality. 42" tire with 4:88 gears = 2538 RPM and 35" with 4:09 = 2552 RPM. Unless your driving on dry asphalt your not going to wig out anything.
You do need to be certain your tires are the actual size stated as not all tires are equal.
Some 35's are 33 and some are 34 etc.
Plus when your in the mud off road you want your front pulling more for better control.
Example: 4:09 front and 4:11 rear in a stock truck.
Same enough. Now burn off your rear tires screwing around for your buddies. Your bald 33's are now 32's. 2805 RPM. Your new 33's with 4:09 2707 RPM.
So me with 35's and 4:09 and 42's with 4:88's my RPMs are 14 apart but yours are a 100 apart. If you run 33's all around the 4:11 will still be 2720 RPM which is 13 RPM difference. Not so much less than my 14 RPM.
I don't really disagree with anything you say. However, you would never see me burning up tires that I plan on driving daily with. I'd go buy some cheap junkyard rims and the most bald tires I can get at a tire shop. I do remember those mud trucks with vastly different sized tires, however they are oranges to our street truck apples. I thought it went without saying that mudding, topsoil driving, or complete and thick snow cover driving where the wheels can slip all the time would be fine for such a setup. I was talking about winter driving where there are patches of dry or salted pavement where tire slippage on decent tires is difficult. Sure when they are matched to what you presented with different front a rear tire sizes it would be like stock 4wd. As you pointed out, just because the tire says its a 35, doesn't mean it is, so you have to measure yourself, sure not a problem. Then you have to keep measuring them as their life is used up to make sure they don't deviate too much, as different sized tires will wear in different rates, it doesn't even have to be drastic, 2 years and your tires are just as bad as the burnout example you made.
However you did prove that you are aware of the issues. Since you are, i'd say its perfectly fine for you to do something like this (I know you said you wouldnt) as you would pay attention to the details. At first I had no idea if you knew what you do.