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Message: <blockquote data-quote="stutaeng" data-source="post: 29573" data-attributes="member: 6175">How much do you drive the truck? Like how many kilometers per month?The way these transmissions work is: the pump pressurizes the fluid and the EPC regulates the pressure DOWN, to specified levels. It's a fail-safe design so such that, if there's a fault, it commands line (maximum) pressure, instead of the other way around where a failure will leave you with NO pressure.It's not ideal to run it like this because it causes unnecessary shock to the internal components. In extreme cases, it can blow out case lugs, seals, drums, etc. and cause damage to hard parts. Will that be your situation? "probably" not, but there is that risk...Yes, do the easy tests first. Those harnesses are currently around $75 here, and not that difficult to replace after dropping the pan.</blockquote>