Have you run your truck in 2wd in the 1/4? Wondering if your mph is higher.
Also, do you switch out of 4wd during the 1/4 run? Just wondering how much drag the 4wd causes.

 

4hi all night long, i have never tried switching while running, got too many other things to do.

on my truck 4hi is alot smoother than auto4wd, auto seems to let it get started at pealing out and then tries to stop it abrubtly.