Muncie part number 12T36874 is a genuine O-Ring used as a service replacement in Muncie PTO units. This part appears in two Muncie service parts documents: as item 19 in the Z25 Series PTO (SP25-02) and as item 16A in the RL Series PTO (SP94-01). The Z25 Series is a clutch-shift, light-duty PTO designed for the Ram TorqueFlite HD/ZF PowerLine transmission and the PACCAR TX-8 transmission. If you are servicing a Z25 or RL Series unit and need to verify which O-Ring position this part covers, Pro Gear and Transmission can help you cross-reference the correct service document for your application.FeaturesGenuine Muncie O-Ring, part number 12T36874Referenced as item 19 in Muncie Z25 Series PTO service document SP25-02Referenced as item 16A in Muncie RL Series PTO service document SP94-01Applies to Z25 Series clutch-shift PTOs designed for Ram TorqueFlite HD/ZF PowerLine and PACCAR TX-8 transmissionsCall us to confirm the correct position and application for your specific PTO unitUsed in these Muncie PTO modelsRL SeriesZ25 Series