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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: thirsty on April 08, 2012, 10:24:36 am

Title: 81-87 manual window regulator
Post by: thirsty on April 08, 2012, 10:24:36 am

Can someone tell me how to identify an 81-87 window regulator versus a 73-80 regulator?
I know the glass is thinner in the 81-87 but not sure that I can tell them apart by just looking at the regulator.

A long time ago I donated my manual regulators out of my 86 to someones build because I had electric regulators that I was using. Now I want to switch back to manual windows and have to look for some. I want to make sure I get the right ones.

Thanks everyone.

Title: Re: 81-87 manual window regulator
Post by: chuck13 on April 08, 2012, 09:38:08 pm

i'm sure someone will correct me if i'm wrong but......

isn't the channel that the regulator runs in on the window itself?i'm
pretty sure it is.i don't think the regulator itself is different from 73-80
and 81 up.............

Title: Re: 81-87 manual window regulator
Post by: Jason S on April 14, 2012, 10:54:51 pm

'73 had smaller rollers.  74-87 have the same size rollers, but the shaft the handle attaches to is different length.  73-76 had the same handle shaft length.  77-87 was a longer handle shaft.

Here is a photo comparison of the 74-76 (74 K-10) on the right and the 77-87 on the left (83 C-10).
Handle shaft length:
(https://lh5.googleusercontent.com/-8xUP0O-3hvg/T4pFGjn4SlI/AAAAAAAAAcw/WdBCCHYfIe4/s640/DSC00738.JPG)
Overall dimensions:
(https://lh5.googleusercontent.com/-iqwfBvYnyWc/T4pFJSbhSAI/AAAAAAAAAc4/deyypGY1eeU/s640/DSC00739.JPG)
Here is a comparison on the window width (just FYI)
(https://lh3.googleusercontent.com/-jdRd7O6aGz4/T4pFMySZ9fI/AAAAAAAAAdA/aLNNLwHlkrs/s640/DSC00741.JPG)

Title: Re: 81-87 manual window regulator
Post by: thirsty on April 15, 2012, 08:24:02 am

Perfect Jason! I was hoping there would be a visual difference that I could use to determine what style the regulators came out of.
Thanks a lot.

Title: Re: 81-87 manual window regulator
Post by: Jason S on April 15, 2012, 09:30:13 pm

When doing a swap a few months ago, I thought I should take some photos just in case.  Glad I could help.

Title: Re: 81-87 manual window regulator
Post by: Captkaos on April 19, 2012, 01:43:53 pm

Can't add a thing to this other than awesome job getting them all together, can I use this in a Tech thread?

Title: Re: 81-87 manual window regulator
Post by: Jason S on April 21, 2012, 01:18:36 am

Sure Capt. Use what you need.  I'll be happy if it helps someone to keep from having to retrace their steps.