Delayed Downshift is the term for this problem....:coolg:

I had this problem over a year ago...
mine got so bad, after coming to a stop, (and being stopped for up to 30 seconds) then releasing the brake and applying gas caused a loud thump/harsh downshift from the last gear.

After taking it to the dealer 2 times, they finally figured out the line preasure was way too high.... so they asked the isuzu warrenty folks, and they opted to just replace the whole tranny with a new one,

The new tranny works much better and does not have the "delayed downshift" that the old one did
It does still downshift firmly, sometimes even with a small 'clunk' noise. I feel this is normal....

good luck


Allan
99 VX on 35"s