demsvmejm said:
... One point to note however is that some transmissions/transaxles have fluid temp sensors that the PCM uses to control shifting and aftermarket oil coolers cool too much. That is why I always install mine on the output side of the trans. Out of the trans, into the aux cooler, out of the aux cooler into the radiator cooler and then back to the trans. Popular Mechanics had an article about this a few years back. The thought is the aux cooler will take out the heat, and in cold weather the radiator will warm th efluid back to operating temp sothe trans/PCM is happy. In hot weather the aux cooler cools and then the radiator cools a little bit more. This is how I have my '95 Blazer plumbed...
Most interesting! I've never heard of this setup but it does make sense. A friend of mine is an engineer who spent years in the auto industry designing oil coolers. He once made a throwaway comment that most people install poor quality coolers in the wrong loctation, thus creating the potential for more problems than they prevent. I'm gonna ask him if this is what he meant.
BTW - he did a lot of testing on Chrysler minivans. They would go down to Death Valley in August, instrument the vehicle to within and inch of its life, connect a U-haul trailer with
10,000 lbs of sand on board :^ find a long, long hill and stand on the gas til something bad happened. The idea being to break it good then go back and analyze the data from the sensors in order to optimize cooler design. He said his foot used to get real tired from holding it to the floor for extended periods. He couldn't use the cruise control because the engine produced no appreciable vacuum at WOT under those conditions.
Some guys have all the fun...