4L60-E Automatic Transmission ID Number Location, M30

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: 4-Speed Overdrive Automatic Transmission Component View

Courtesy of GENERAL MOTORS CORP.

The 4-speed overdrive automatic transmission, the Hydra-Matic 4L60-E (RPO M30), has two identifying stampings or laser etchings:

Fig 2: 4L60-E Automatic Transmission ID Number Location Component View M30

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Automatic Transmission ID Number Location

The transmission identification (ID) number indicates the transmission model type and when the unit was built. The transmission ID number is located on the bottom of the case just rear of the oil pan.

Automatic Transmission Identification Number System

Position	Definition	Character	Description
1	Model Year	4	2004
2-3	Model	Y	Corvette
4	Transmission Type	D	HYDRA-MATIC 4L60-E
5	Calendar Year	4	2004
6-8	Julian Date (or Day of the Year)	-	-
9	Shift Build	-	-

Fig 3: 4L60-E Automatic Transmission VIN Derivative Locations Component View M30

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	VIN Derivative, Primary Location
2	VIN Derivative, Secondary Location
3	VIN Derivative, Optional Location
4	VIN Derivative, Optional Location

A VIN derivative will be located in either the primary or secondary locations, or the optional locations as shown. For additional information, refer to VIN Derivative .