Added second trans cooler silverado 5.3.

Nice looking install. I'm not a big fan of adding additional trans coolers in general especially when the factory already has both the OTA and OTO coolers installed. These cooling systems have a lot of design in them and include a critical factor that adding an additional cooler to what is already there can have a potential negative impact. That factor is "flow rate". A specific cooling system has a flow rate window where if you happen to reduce that flow outside that window you can negatively impact the overall cooling capacity and effectiveness. IMO the most critical part of a good heavy duty trans cooling system is making sure that the OTO cooler is working at it's most effective point since that is often where cooling issues are the most critical and the OTA coolers do little to augment that part of the cooling equation.

Another thing many don't realize is that trannys are designed to operate at temps in the 170 deg or so range and getting them up in temp closer to 200 deg is actually beneficial since it helps keep any moisture in the ATF down thru evaporation. Thus adding too much OTA cooling can actually negate this benefit during cold weather and light load and higher speed operations where the tranny never sees much above 150 which is really not something you should want to see as a routine max temp.

Larry