Check ball position of Toyota/Aisin automatic transmissions

Check ball position of Toyota/Aisin automatic transmissions

During valve body removal in Aisin transmissions, the check ball could easily fall off and where it falls from is sometimes a challenge to technicians. The picture attached servesaas a sample since where the check ball stays looks identical in many Aisin transmissions.

 

Securing the check ball and the check ball spring in place before putting the valve body in place can be challenging too.

 

Follow below steps to put the check ball and spring in place easily:

  • Wipe the position where the check ball and spring should stay off with a clean dry cloth. This will remove oil that can prevent the petroleum jelly from sticking with the transmission casing
  • Use petroleum jelly to hold the check ball in place before putting the valve body.