Description
Part# ATF 409 061 C
Updating our favorite vintage vehicles with advanced technology replacement parts, current modern day engines, and transmissions in a seemingly unnoticeable way, has always been our mission. FASTT’s Automatic Transmission Cooler “Heat Sink” is a compact, efficient solution that provides superior cooling over its factory original counterpart. Our “Heat Sink” mounts up into the factory stock location easily in less than 15 minutes. The kit includes a hose union offering a quick solution by joining the two coolant hoses together with no added work or expense.
30 Years ago we asked the question: “Why would anyone design a factory cooler using antifreeze running at a higher operating temperature than the fluid it is attempting to cool (ATF)?”- makes no sense. We’ve heard all the answers and arguments.
The most common:
1. It helps the transmission fluid warm up to operating temperature faster- not true. They start off at close to the same temperature, with the tranny heating up much faster to start off. Even if it were the case, it should have been thermostatically controlled to kick off after operating temperature is achieved.
2. It keeps the transmission fluid at a lower more constant temperature – also, not true. Try mounting a temperature gauge on an earlier Bay Window automatic transmission. They constantly run 15-20 degrees cooler than their WBX counterpart without any cooler at all.
The bottom line is that the factory cooler is, and always has been, a completely flawed design. We’ve seen several attempted solutions offering more expensive, more complicated, and larger remote coolers, but they completely fail in 1 of 2 areas:
1. Fail to address the constant threat of mixing engine and transmission fluids.
2. Remote coolers force the transmission oil pump to push fluid, in some cases, several feet away. These pumps were not designed to do this. Every remote cooler of our competitors we’ve witnessed experience a buzz, or terrible whine at idle. Try a stethoscope- It’s coming from the oil pump.
Both scenarios cause very costly repairs.
