I'm looking to buy a new medium duty (under 26,000 GVW) truck next year before the new 2007 diesel emissions regs. take hold. I've have had great luck with 2 previous Isuzus (rated at 17,500) one is a 2000 and other a 91. I'm sure I'll keep them but will look to upgrade my F350 one ton dump. My question is what is the feedback on the Allison automatic transmissions. I believe initially there were some problems (as with all new set ups) but have they ironed them out? My previous Isuzus were standards but it seems harder and harder to find people to use a stick, so I might consider the automatics.