Marine Transmission How To’s & Photos

Be sure to take caution when removing the hex nut to gain access to the oil screen. Use a 36mm wrench and BE SURE to back up the aluminium screen housing to prevent the housing from breaking off.

For all ZF transmissions that use ATF, the shift valves have two locations for both temperature and pressure senders/sensors as shown below. You cannot obtain operating oil pressures via the transmission cooling circuit because that circuit between the valve, oil … Read More

A leaking seal is most likely related to “wear & tear” (maybe rust), and/or a leaking thru-bolt that connects the coupling… Either way, it’s an easy fix IF access is good and the gear is not a total rust bucket… … Read More