Internal Oil Pump

Although many transmissions look different the layout is common. Below pictures can represent various transmissions. See below to indicate if the transmission includes an internal pump
 
MOST TRANSMISSIONS EXCLUDING MACK & SPICER/TTC
 
HAS OIL PUMP

If the transmission has an internal oil pump you will notice 2 half inch NPT holes for oil lines positioned towards the bottom of the transmission.

 
HAS NO OIL PUMP

If the transmission does not have an internal oil pump there will be no half inch NPT holes for oil lines positioned towards the bottom of the transmission.

 
EATON FR SERIES
 
HAS OIL PUMP

If an Eaton FR Series transmission has an internal oil pump it will be located towards the bottom of the transmission.

 
HAS NO OIL PUMP
 
MACK
 
HAS OIL PUMP

If a Mack transmission has an internal oil pump it will be located at the front of the transmission by the input shaft.

 
HAS NO OIL PUMP
 
SPICER/TTC
 
HAS OIL PUMP

If a Spicer/TTC transmission has an internal oil pump it will be located underneath the transmission towards the back.

 
HAS NO OIL PUMP