Lost the first a4ld at 165k miles.. no towing (no external cooler)
Lost the 2nd a4ld at 236k miles (lost water pump, over heated, melted hard parts) no towing.... (had external cooler)
Lost the 3rd Tranny before 300k miles.. (I think it was 280k miles).. Lots of towing (towed 1600 lbs of water + trailer weight 3 times a week... highway and 2 lane twisty/hilly).. Had tranny cooler and external filter.
Lostt 4th tranny at about 310k miles.. not really gone, but had an issue with the valve body (not too bad)... same towing + more off-road driving (e.g. Glamis Sand dunes).. Decided to NOT replace the a4ld with another one...
Currently have a 7004r in the truck... almost done... All that is left is 1 cooler line, finish installing the shifter (mounting it to the floor), and the electrical line to turn off the TCC, reverse light wire and the neutral safety switch.
Oh yea.. I have to "tune" the TV cable yet..
~Mark