Yes, it is a 3 speed aux w/Direct-drive, Over-drive, Neutral and Under-drive.

This is a factory unit from GM, all the casting have GM part numbers.

If you look at the photos enlarge #5 and look at the shift pivot point and the 2 rods below it. The 2 rods are the shifting mechanism for the gear box. The inner rods has 3 positions, IN, center & OUT. The outer rod has 2 positions, IN and OUT...OUT matching the center position of the inner rod.

There are in the neutral position now.

Last edited by GMCPic; 10/28/2013 2:34 AM.
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