It's a good idea to replace the seal for the OD solenoid plunger on the housing while it is out. If oil gets into the solenoid it will cause problems. You can take the cover off and check the contacts and clean if needed. To test the solenoid operation, ground the base, apply 12V to the #4 terminal. It should click in and stay in. The seal number is 3060CR, Napa should be able to order it for you.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine