07-10-2023, 10:30 PM
my 2006 3600 Open has twin Cummins 5.9 QSB's with ZF 220 A transmissions. The transmissions are identical (same model and SN for some reason) so one runs in reverse when underway. I have noticed that one transmission has slightly higher running oil pressure and slightly lower oil temperature ~ 15 psi, can't recall the temp difference. Are these differences expected given that one unit is running in reverse?


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