The Stovebolt Site Forums The Parking Lot Big Bolts Help wiring for Eaton 2 speed axle

Any and All,

I need to replace the shifter switch for my 454-30 dump truck. Switch is broken and crumbling.

I found a new switch on eBay, but no wiring diagram. Wires are in 3 different sections/pieces none of which are connected.

Anyone have the diagram to wire up a electric shift 2 speed. Circa 1952.

Thanx,
GMCPic

GMCPix,

I assume you have the Red push/pull switch...

The switch is wired as follows;

Green = 12v from the Fuse Panel

Red = High Rear

Black = Low Rear

The Black wire will be Tee taped under the floor with a wire that goes up to the speedometer adaptor located at the dash. The adaptor keeps the speedometer accurate regardless of what speed the rear is in, it's a little electric reduction unit in-line with the speedometer cable.

Make sure you ground both the electric shift motor and the adaptor...

That's it!

Mike B

Got bigger problems now with shift unit.

When I hookup the switch and turn on key/power I get power to both terminals. Even when I disconnect one wire from switch terminal block.

Wires are totally rotten, crumble when touched.

So now I have to rewire the whole shift system.

Also, I am going to look into changing the shift motor too 12v.

Any ideas?

GMCPic,

The switch and switch harness are still available new from Eaton. The switch is part number 32861 (about $10), I can't find the harness number. I think I got one from NAPA about a year ago.

The center terminal on the switch gets the hot wire from the fuse block. The top terminal is High speed and the bottom is Low.

Mike B

Found some parts on ebay for old style Eaton 2 speed.

Now I have to find out if they will work.

Also I found another truck on Craig's list.

Going to look at it Sat.