Turbo Hydra-Matic 400 Decoding

Code/Engine HP/Vehicle
CA - 350,396,400,402 (145,160,170,240,255,265hp)  2bbl, Chevrolet, Monte Carlo
CB - 400,427,454 (180,345,390hp) Chevrolet
CC - 396 (325hp) Chevelle, Camaro
CD - 327,350,400,402,454 (215,235,240,250,300hp) Chevrolet, Chevelle, Monte Carlo
CE - 396 (350hp) Chevelle, Camaro, Nova
CF - 402,427,454 (215,235,270,335,350hp) Chevrolet, Chevelle, Monte Carlo
CG - 396,454 (265,365,390hp) Chevrolet, police
CH - 427 (390hp) Chevrolet
CJ - 396,402 (???,240hp) Chevy Truck 10,20,30 series
CK - 350 (165,190,195,200,300hp) Corvette
CL - 427 (400hp) Corvette
CP - 454 (???hp) Chevy Truck C-10/20/30 series
CQ - 427 (335hp) Chevrolet
CR - 400,402,454 (170,215,235,240,270,360,390hp) Chevrolet, Monte Carlo, Chevelle, police
CS - 454 (245,270,360,365hp) Corvette, Chevelle, Monte Carlo
CT - xxx (???hp) Chevy Truck C10 & C20 series
CW - 402 (375hp)...Chevelle, Camaro, Nova
CX - 396,427 (375,425,430,435hp) COPO
CY - 350,396,427,454
    (high shift point)		 (245,375,425,430,435,450hp) Chevrolet, Corvette, Chevelle, Camaro, Nova.
CZ - 350 (205,250,255hp) Corvette

(Note: List is not complete but data collection are ongoing.)

Identification tag

A small metal tag is affixed to the passenger side of the transmission just above the pan rail. This identified the model year, engine type, date, and transmission serial number.

File Photo
501 ~ May 16, 1967 (501st day from January 1, 1966)
CC ~ 396 (325,350hp) Chevelle, Camaro
67 ~ 1967
13884 ~ Transmission serial number

Courtesy Bill Lessenberry
282 ~ October 9, 1967 (282nd day from Jan 1, 1967)
CC ~ 396 (325hp) Chevelle, Camaro
68 ~ 1968
5813 ~ Transmission serial number

File Photo
337 ~ December 3, 1967 (337th day from Jan 1, 1967)
CC ~ 396 (325hp) Chevelle, Camaro
68 ~ 1968
25916 ~ Transmission Serial Number

File Photo
205 ~ July 23, 1968 (205th day from January 1, 1968 - leap year)
CE ~ 396 (350hp) Chevelle, Camaro, Nova
69 ~ 1969
1071 ~ Transmission serial number

File Photo
228 ~ August 15, 1968 (228th day from January 1, 1968 - leap year)
CC ~ 396 (325hp) Chevelle, Camaro
69 ~ 1969
2028 ~ Transmission serial number

Courtesy Chris Carney
290 ~ October 17, 1968 (290th day from January 1, 1968 - leap year)
CE ~ 396 (350hp) Chevelle, Camaro, Nova
69 ~ 1969
1882 ~ Transmission serial number

File Photo
304 ~ October 31, 1969 (304th day from Jan 1, 1969)
CF ~ 402,427,454 (215,235,270,335,350hp) Chevrolet, Chevelle, Monte Carlo
70 ~ 1970
8569 ~ Transmission serial number

10/28/2009
281 ~ October 8, 1969 (281st day from Jan 1, 1969)
70 ~ 1970
CY ~ 350,396,402,454 (high shift point) (245,375,425,430,435,450hp) Chevrolet, Corvette, Chevelle, Camaro, Nova
2683 ~ Transmission serial number

File Photo
413 ~ February 17, 1970 (413th day from Jan 1, 1969)
70 ~ 1970
CY ~ 350,396,402,454 ( high shift point) (245,375,425,430,435,450hp) Chevrolet, Corvette, Chevelle, Camaro, Nova
1928 ~ Transmission serial number

File Photo - 10/12/2010
463 ~ April 8, 1971 (463rd day from Jan 1, 1970)
71 ~ 1971
CD ~ 327,350,400,402,454 (215,235,240,250,300hp) Chevrolet, Chevelle, Monte Carlo
19284 ~ Transmission serial number

04/30/2010 - Bill Hall
Courtesy Bill Hall
203 ~ July 22, 1971 (203rd day from Jan 1, 1971)
72 ~ 1972
CF ~ 402,427,454 (215,235,270,335,350hp) Chevrolet, Chevelle, Monte Carlo
1535 ~ Transmission serial number

Partial VIN

Partial VIN location ~ 05/28/2009
Partial VIN stamping on a Los Angeles built 1970 Chevelle TH400.

File Photo
Partial VIN stamping on a Los Angeles built 1970 Chevelle TH400.

03/21/2010
Partial VIN stamping on a Kansas City built 1969 Chevelle TH400.