I am running a set of Patrick's 3:55 in my 41 1/2 ton with stock 41 4-speed, 55 235 runs 65-75 on the freeway, don't down shift for hills, infact I tend to pass late model trucks on most of the grades. Just my 2cents.
"If it ain't Steel it ain't Real" "Earth the insane aslyum for the rest of the Universe" 41 1/2-ton, a work in progress 68 Shortbed stepside 327/325hp/700R4
