Update for those interested in these trucks still
The PPEI trans tuning for the Aisan H.O trucks is 150% worth it. Really changed the MDT feel of the trans into more of a "built auto" feel. Same firm shifts (if not a little firmer) but happens much quicker.
That dead pedal get T-boned in traffic 1-2 shift is completely gone. 2-3 shift is much improved and the truck will downshift much quicker with a load rather than lug down to 1400-1500rpms as previous with the stock tuning.