I Am Not Able To Perform 90 Degree Blindside Backing, AT ALL

I didn't have to do 90s for my test, at the time in AZ, only 3 maneuvers were required. It left me at a disadvantage when I went to our top gun class. All the other kids had experience with it, I didn't.

As many have said watching the tandems and trailer is essential. But you can't really see much of it on a blindside.

To combat that, I use the hood mirror a lot, you can easily see the whole unit in it, I also use the convex as well. About midway through I'll adjust my right mirror out as well. It's kinda a feel thing though. You're looking for arc, not a pivot.

That being said, ice will force the tandems to pivot earlier as there's little lateral resistance. It will cause a smaller arc and a tighter turn since the tandems are effectively skidding their turn. Think about turning sharply on skis, It makes a progressively smaller radius turn.

It may be when and how forceful you are doing the steps in the progression that's throwing you off. There's probably a cadence that the instructor does it at. Hard to explain, but the timing of the movement effects where the trailer is relationship to the hole.

If you get to steps 2 and 3 for example too quickly, the trailer is probably going be turning 50 feet before it should. Most new drivers over turn the wheel and turn to much too soon.

I personally found having it like all mapped out helped me. The purpose of learning the maneuvers for me wasn't to learn how to back in the wild. It was to learn how to pass my exam and get my cdl.

I've had accounts that I've been on like cosco and lowes that were nothing but blindside 90s and oddball blindside, usually around the workers cars as an added bonus. You get used to it.