Offset Backing Advice Needed, Please!!

Hi all, I'm Benjamin and I am attending a trucking school here in Texas. My instructor is say prior to offset backing turn the wheel all the way to the right or left depending on offset left or right. Which is fine and I agree but than he says to do a 3 second count but that I can't get no consistency from going to fast or slow. I have found information online of knowing you are at the right angle when you see 3/4 of the landing gear in the convex mirror. Could someone please elaborate how to use this method, because I can't use the corner of trailer over thetractor frame rail method due to we are using tractor w/ sleeper. Any and all help would be very much appreciated. 

Thanks all,

Here is a link to a video that helped me even I was in school. For some reason I can't get it to post, so you'll have to cut and paste. Or, just look up "offset backing" on youtube. Good luck.

https://youtu.be/M4XFLZ39cGk

Benjamin, to directly answer your question, the "three second count" is based on engine idling speed. So there's no "fast" in this backing maneuver.

When I'm teaching this move, I use the word "twist" to mean you are changing the trailer's direction. (There's too many things "turning" when you're driving a truck.)

Keepin mind your main job in backing is to aim the back end of the trailer to go towards your target. So in an offset back you need to twist the trailer to move over one spot, most often to the right.

So you turn the steering wheel left to go right. I think you got that part. The best marker you can use is the landing gear. So turn the wheel and watch for your magic point in the landing gear and never mind about how many seconds it takes. (I teach to look for the half-way point - the V at the center of teh landing gear.)