Largecar04,

I did some further digging in the GM Heritage site and based on what I found 1946 Chevrolet Truck "brake" data, your parking brake setup consisted of the transmission mounted hand brake lever assembly that actuated the rear axle mounted drum brake shoes through a rod and cable system. See the below screen shots taken from the page indicated.

I thought you may have been describing a "transmission mounted" drive line parking brake setup like is found on later AD series trucks. My apologies for getting this wrong. Turns out there was a "drive line" mounted parking brake setup, but was only an RPO for "buses" so doesn't apply to your 2 Ton.

For further diagrams and part number info, you should look through this 1941 Shop Manual which I think remained the same through 1946 due to no model changes during WWII. You may also want to look at Chevy Master Parts List 1929-54 which lists parts and some diagrams that relate to your '46 parking brake needs.

Hope this info is helpful.

Dan
Attachments
Parking brake description 1946-Chevrolet-Truck.pdf.png (68.17 KB, 83 downloads)
1946 Parking brake description
Bus RPO parking brake description 1946-Chevrolet-Truck.pdf.png (120.91 KB, 82 downloads)
1946 Bus Parking brake description


~ Dan
1951 Chevy 3 window 3100
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