[VACList] Need for automatic transmission oil cooler over OEM

["Oliver Filippi" <ofilippi@xxxxxxxxxxxx>]

The reason factory installed transmission oil coolers on pleasure vehicles (not heavy duty 
commercial trucks) are often inadequate for heavy duty use is because the product decision 
is made by the marketing department, not the engineering department.

Remember, these are the guys that recommended 24 PSI inflation pressure in the tires (for 
a softer ride, not safety or handling).  Likewise, these folks also call out for 
extraordinarily long oil change intervals so that a bunch of other service activities can 
be performed at the same time by the dealer.  Granted, the oils are a lot better than they 
used to be, and engines are machined to much closer tolerances BUT oil does get chemically 
contaminated from blow by, and many of the additives break down or are consumed by long 
mileage.

OEM transmission oil coolers are designed to prolong the life of the transmission (taking 
into account it's expected life) they are not designed to prolong the life indefinitely. 
Also, there are cost considerations.  All told, the manufacturer makes a value judgment as 
to the function and cost of everything he puts into his  vehicles.

Oliver Filippi