Window Lift Gear Replacement
and Installation Instructions

Oct 2014 Rev 1.

Congratulations. You have purchased one of the finest replacement parts made for your Chrysler 300. John Grady has designed and manufactured new gears for the 1960-1964 Chrysler power window motor units. If you choose to replace your gears yourself, please follow these instructions as it will ensure that you install the gears properly on your gear boxs. If you choose to have someone else do the work, or have any questions on these procedures, contact Jamie Hyde or 585-465-0067 for assistance.
Please note these gears are non returnable and can be damaged if you attempt to install them without following these instructions.

There are two styles of gear boxes -- early and late. These gears fit only the late style gear box.
The pictures below show the difference in early and late.

  1. Read these instructions from start to finish before you attempt to replace the gears.

  1. Obtain the proper Factory Service manual for your car to remove the motor and gear box from the car. Be careful as the regulator has a spring and can severely injure your fingers if you attempt to remove the regulator from the door. I removed just the motor and gear box with the window all the way up. This way the spring in the regulator holds the window up. No need to index the window in any location. I did this on my J but your model could be different.

  1. Box with motor removed, notice the casting numbers, if you are doing more than one gear box do not mix up castings with different numbers.

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  1. Remove cover screw and disassemble

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closer view of broken gear

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Closer view of shaft flat

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