Whats the difference between 55-57 and 58-59 Wiper Motors?

[ChuckDriver]

I thought the arms for the electric ones were different from the vacumn ones?

[1project2many]

Going by memory, many years ago I tried to put a 59 electric motor in a 55 cab. The 59 motor had a square or squared plate that mounted to the cab and it wouldn't fit into the 55 cab so all the bolts would line up. As I remember it the 59 cab was stamped a little differently where the motor mounted.

[Russell Ashley]

Originally Posted by ChuckDriver

I thought the arms for the electric ones were different from the vacumn ones?

The arms must be the same for vacuum or electric. I bought an electric wiper motor off of EBay and used my original vacuum arms. They fit and work correctly.

[buggy5872]

58 - 59 electric wiper motors are different than 55-57. the mounting is a little different and the arms under the dash are different. The 58-59 wiper motor makes the arms go around in a circle where they mount, one on top and one on the bottom. The 55-57 motor has a mechanism that makes the arms go back and forth.