Upgrading trans heat exchanger to an oil cooler

[Hammerhead]

(09-26-2017 )Pigpen 2869 Wrote:  Got everything thru New Hampshire Peterbilt. Filter kit was around 200.00 dont remember how much the cooler was. Filter was remote mount and no pump was needed. Disconected oil cooker and replaced it with air one. Just hafta be careful on the direction of flow coming out of tranny and into filter. Tranny is marked in and out. Only one port on filter housing was markked. Or at least thats what Captain Morgan told me.

Yeah, there is a gear pump in all trannies that drives off of the input shaft and circulates the oil through the cooler, and yes all trannies are marked "In" and "Out" on the ports, some just need to be cleaned well, like mine, to be able to see it.