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#848733 - Thu May 03 2012 09:19 PM Help wiring for Eaton 2 speed axle
GMCPic Offline
Shop Shark
Registered: Fri Apr 06 2001 12:00 PM
Posts: 477
Loc: Paradise,CA,USA
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, wink
GMCPic

_________________________
Dance like no one is watching,
Sing like no one is listening,
Love like you've never been hurt.

1948 GMC FC101 1/2t Pickup w/270 and SM420
1948 GMC FC253 1t Factory 80"x9' Flatbed Dually
1948 Chevy COE 2 Ton 8'x15' Flatbed
1950 GMC 354-24 2 Ton 8'X12' Flatbed w/Dump Hoist
1953 GMC 454-30 3 Ton 8'x14' Flatbed w/Dump Hoist
1953 GMC 454-30 3 Ton Cab and Chassis
1942 Clarkator 6 MILL-44 Heavy Aircraft Tug
1942 Ford (9N) Moto Tug with 1/2 yard Loader
1947 Oliver OC3 HG-42 Tract-Crawler Bull Dozier w/6' Blade
Top
#848764 - Thu May 03 2012 10:23 PM Re: Help wiring for Eaton 2 speed axle [Re: GMCPic]
Mike B Offline
Shop Shark
Registered: Sun Mar 07 2004 12:00 PM
Posts: 2169
Loc: Hughesville, MD
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 smile


Edited by Mike B (Thu May 03 2012 10:24 PM)
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#869023 - Tue Jul 24 2012 01:03 AM Re: Help wiring for Eaton 2 speed axle [Re: Mike B]
GMCPic Offline
Shop Shark
Registered: Fri Apr 06 2001 12:00 PM
Posts: 477
Loc: Paradise,CA,USA
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?
_________________________
Dance like no one is watching,
Sing like no one is listening,
Love like you've never been hurt.

1948 GMC FC101 1/2t Pickup w/270 and SM420
1948 GMC FC253 1t Factory 80"x9' Flatbed Dually
1948 Chevy COE 2 Ton 8'x15' Flatbed
1950 GMC 354-24 2 Ton 8'X12' Flatbed w/Dump Hoist
1953 GMC 454-30 3 Ton 8'x14' Flatbed w/Dump Hoist
1953 GMC 454-30 3 Ton Cab and Chassis
1942 Clarkator 6 MILL-44 Heavy Aircraft Tug
1942 Ford (9N) Moto Tug with 1/2 yard Loader
1947 Oliver OC3 HG-42 Tract-Crawler Bull Dozier w/6' Blade
Top
#869260 - Tue Jul 24 2012 08:48 PM Re: Help wiring for Eaton 2 speed axle [Re: GMCPic]
Mike B Offline
Shop Shark
Registered: Sun Mar 07 2004 12:00 PM
Posts: 2169
Loc: Hughesville, MD
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 smile
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#869274 - Tue Jul 24 2012 10:15 PM Re: Help wiring for Eaton 2 speed axle [Re: Mike B]
GMCPic Offline
Shop Shark
Registered: Fri Apr 06 2001 12:00 PM
Posts: 477
Loc: Paradise,CA,USA
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.
_________________________
Dance like no one is watching,
Sing like no one is listening,
Love like you've never been hurt.

1948 GMC FC101 1/2t Pickup w/270 and SM420
1948 GMC FC253 1t Factory 80"x9' Flatbed Dually
1948 Chevy COE 2 Ton 8'x15' Flatbed
1950 GMC 354-24 2 Ton 8'X12' Flatbed w/Dump Hoist
1953 GMC 454-30 3 Ton 8'x14' Flatbed w/Dump Hoist
1953 GMC 454-30 3 Ton Cab and Chassis
1942 Clarkator 6 MILL-44 Heavy Aircraft Tug
1942 Ford (9N) Moto Tug with 1/2 yard Loader
1947 Oliver OC3 HG-42 Tract-Crawler Bull Dozier w/6' Blade
Top

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