C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Window Regulator

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Old Apr 8, 2022 | 09:52 AM
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Default Window Regulator

For a 1985 C4:

My windows go up and down ... slowly. I think the motors are worn out.

1) Can one simply get the motors and replace them or does the entire assembly need to go?

2) Are there compatible interchangeable window regulators/motors from other GM models that have the same wiring and connectors as for my C4 that I can use?

Charles
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Old Apr 8, 2022 | 11:00 PM
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Cruisinfanatic
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From: Clifton Park, NY ............Clearwater, FL ... 85 Original Owner
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Originally Posted by Charles212
For a 1985 C4:

My windows go up and down ... slowly. I think the motors are worn out.

1) Can one simply get the motors and replace them or does the entire assembly need to go?

2) Are there compatible interchangeable window regulators/motors from other GM models that have the same wiring and connectors as for my C4 that I can use?

Charles
all early c4's work slow. Upgrade to the 88-96 model for fast windows
Used will do

Window Regulator AA6892 and AA6774

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Old Apr 9, 2022 | 04:40 PM
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Thanks for the input.

Can I simply swap out the motor or do I have to install the entire apparatus?

C
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Old Apr 10, 2022 | 05:57 PM
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From: Clifton Park, NY ............Clearwater, FL ... 85 Original Owner
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Originally Posted by Charles212
Thanks for the input.

Can I simply swap out the motor or do I have to install the entire apparatus?

C
you motor is not the problem
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Old Apr 10, 2022 | 06:27 PM
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Remove the old grease from the window raising components and door lock mechanisms. I use a hot air gun to soften it up which makes it easier to remove from the tracks and linkages. The old grease is frequently hard enough to no longer lubricate but actually inhibit movement of the parts that should move easily.
Once clean then you can replace the grease and your windows, door locks and other parts can move freely and use less power doing so. It made a huge difference in both my C3 and C4.
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Old Apr 10, 2022 | 08:16 PM
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Thanks CT. That is great advice. The windows also rattle quite a bit so I am sure there some door internals that need to be tightened up. I will give it a shot.


C
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