I did a bit of a search but came up blank. Looking for info on removing the rear window. The FSM basically says just to push it in. Is there nothing more to it than that??

 

The rubber is likely hard as a rock and needs replacing so use a drywall knife and cut the rubber on the inside of the cab so the it pushes out into the hands of a bud. Order new rubber from Dennis Carpenter when you are ready to reinstall.


John

 

I cut the rubber on mine on the outside around the window and then just carefully pushed the window inside. Catching the window so it wouldn't crash into the cab.

Was easy- took a few minutes to do.

 

The most useful tool when removing or installing auto glass is a second person on the other side of the piece of glass you're working with unless you have those fancy suction cup handles to grip the glass on your side.
Sixty year old rubber gaskets for glass usually comes one of two ways, either petrified rock hard as John pointed out, or crumbling mush that falls apart the minute you put any pressure on it. Plan on buying a new gasket, and once you get the gasket, you may need to soak it in a pan of hot water to get the gasket to conform to the correct shape.
There are fancy glass removal tools that are made to cut apart auto glass gaskets and the sealer on new style glued in auto glass. The main advantage to these tools is there's very little chance of breaking or scratching your glass.
The garage I worked at many years ago sold a lot of sliding rear windows for pickups. If the truck was (reasonably) new we would re-use the original gasket, my removal tool was a thin flat tip screwdriver that had the last inch bent at a 90 degree angle and the tip ground down to a round ball. I would start in a bottom corner from inside the cab and use my home made tool to lift the rubber gasket up as I gently pushed out on the glass. From there I would work my way up the side, across the top of the glass, then down the other side rolling the gasket over. At that point the glass should just lift out.