Transmission ID and VIN Derivative Location. GMC Truck TopKick C-Series (Conventional) C4/C5 2004

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2004 🢒 TopKick C-Series (Conventional) C4/C5 🢒 General Information 🢒 General Information 🢒 Transmission ID and VIN Derivative Location

Automatic

Allison® transmission identification plates are located on the rear left side of the housing, just above the oil pan.

Allison Transmission ID


(1)	Indicates Planetary Gear Type Automatic Transmission
(2)	Indicates Series
(3)	0 - Indicates Close Ratio 5 - Indicates Wide Ratio
(4)	6 or 7 - Indicates Number of Speed Ranges
(5)	Indicates Major Revision
(6)	Indicates Power Take Off
(7)	T - Indicates Transfer Case R - Indicates Retarder

Manual

Eaton® transmission identification plates are located on the right rear side of the housing, near the top cover.

Eaton® Model FS ID


(1)	Synchronized
(2)	x 100 = Nominal Torque Capacity
(3)	Design Level
(4)	Forward Speeds
(5)	Ratio Set

Eaton® Model RT ID


(1)	Roadranger
(2)	Twin Countershaft
(3)	x 100 = Nominal Torque Capacity
(4)	Multi-Mesh Gearing
(5)	Forward Speeds
(6)	Ratio Set

Dana/Spicer® ID


(1)	Ratio Design B
(2)	Forward Speed
(3)	Maximum Foot-Pounds of Torque
(4)	Easy Shift Synchronized