low gear reduction with 3.91 sure grip

I think he means the 727 was given a lower first gear ratio.

I would liken it to something like, turning the 3.91 gears into 4.30’s or 4.56’s for the duration of first gear. I would need the actual normal first gear ratio as well as the replaced gears ratio to figure out what the new feel ratio would feel like. After you get done with 1st gear, it is back to the normal 2/3 ratios and it drives like it should.

This is done by racers and serious street strip guys that want to get moving off the line quicker. Remember that most races are won and lost at the starting line. Those first few moments matter but time.