El Camino Decoding

 

TH400 Turbo Hydramatic Automatic Transmission

Only those documented via build sheets or other paperwork is listed here and other models of Chevrolets may use the same transmission tag codes. The TH400 was only available when a 396/402/454 engine was ordered. The 2-speed Powerglide was still an available automatic transmission option in 1967 and 1968 but was dropped for the 1969 model year.

Code/Engine Application Year/Horsepower Rating
CC - 396/402 1967, 1968, 1969 - 325hp (L35)
CD - 396/402 1968 - 350hp (L34)
1970 - 330hp (LS3)
1971 - 300hp (LS3)
1972 - 240hp (LS3)
CE - 396/402 1969 - 350hp
CF - 402/454 1970 - 350hp (L34)
1971 - 365hp (LS5)
1972 - 270hp (LS5)
CR - 454 1970 - 360hp (found on Van Nuys LS5s prior to at least 01-04
CS - 454 1970 - 360hp
CW - 402 1970 - 375hp
CX - 396 1969 - 375hp
CY - 454 (high shift point) 1970 - 450hp
   

1967

CAMINOWORLD  - All Rights Reserved
521 ~ June 5, 1967 (521 days from January 1, 1966)
CC - 396 325hp
67 ~ 1967 model year
15486 ~ Transmission serial number

1968

CAMINOWORLD  - All Rights Reserved
538 ~ June 21, 1968 (538th day from January 1, 1967)
CC ~ 396 325hp
68 ~ 1968 model year
60372 ~ Transmission serial number

1969

CAMINOWORLD  - All Rights Reserved
205 ~ July 23, 1968 (205th day from January 1, 1968 [leap year[)
CE ~ 396/402 350hp
69 ~ 1969 model year
1161 ~ Transmission serial number

CAMINOWORLD  - All Rights Reserved
395 ~ January 29, 1969 (395th day from January 1, 1968 - leap year)
CX ~ 396/402 & 427 (375hp)
69 ~ 1969
2147 ~ Transmission serial number

1970

CAMINOWORLD  - All Rights Reserved
304 ~ October 31, 1969 (304th day from Jan 1, 1969)
70 ~ 1970
CF ~ 402 (350hp)
8569 ~ Transmission serial number

CAMINOWORLD  - All Rights Reserved
300 ~ October 27, 1969 (300th day from Jan 1, 1969)
70 ~ 1970
CS ~ 454 (360hp)
x244 ~ Transmission serial number

CAMINOWORLD  - All Rights Reserved
413 ~ February 17, 1970 (413th day from Jan 1, 1969)
70 ~ 1970
CY ~ 396/402 & 454 high shift point (375hp & 450hp)
1928 ~ Transmission serial number

1971

CAMINOWORLD  - All Rights Reserved
463 ~ April 8, 1971 (463rd day from Jan 1, 1970)
71 ~ 1971
CD ~ 402 (300hp)
12894 ~ Transmission serial number

CAMINOWORLD  - All Rights Reserved
218 ~ August 6, 1970 (218th day from Jan 1, 1970)
71 ~ 1971
CF ~ 454 (365hp)
1927 ~ Transmission serial number

1972

CAMINOWORLD  - All Rights Reserved
517 ~ June 1, 1972 (517th day from Jan 1, 1971)
72 ~ 1972
CD ~ 402 (240HP)
18002 ~ Transmission serial number

CAMINOWORLD  - All Rights Reserved
Courtesy Bill Hall
203 ~ July 22, 1971 (203rd day from Jan 1, 1971)
72 ~ 1972
CF ~ 454 (270HP)
1535 ~ Transmission serial number

Partial Vehicle Identification Number

CAMINOWORLD  - All Rights Reserved
Driver side of case just above oil pan rail

Transmission oil pan

CAMINOWORLD  - All Rights Reserved
Early 1967 El Camino TH400 oil pans had a unique heel mark, a bump, and 3 dimples.

CAMINOWORLD  - All Rights Reserved
According to a Chevrolet Service News Bulletin around July of 1967 saw a change in the TH400 oil pan; the heel mark, bump, and 1 of the dimples was gone.