'69 Turbo 400 code?

[SS427]

You guys are my last hope and maybe should have been my first. I recently looked at a '69 Chevrolet I was documenting with a turbo 400. It is definately dated 1969 (mid year) and has a yellow aluminum tag with "CY" on the side. (69-Y-xxx) I cannot find a "Y" code anywhere, only B, F, H and X for '69 turbo 400. It is NOT a '70 trans based on the tag date and is definately a Chevrolet trans. Someone please tell me what trans this is. HELP!!!

[YENKO DEUCE REGISTRY]

I don't see the 'Y' listing for the '69 applications either. The small note in the '70-'75 CBTN's book says that for the '70 TH400: "the assembly date code for the 1970 model year starts with the first day of the calender year in 1969 and continues through the 1970 calender. '372' is January 7, 1970."

What is your 3 digit date code? I guess if it's higher than 243 (Aug 31, 1969) it would be into the '70 build year??
M

[SS427]

YENKO DEUCE,
Thanks for the quick reply. Based on several facts, I am quite sure this is a '69 transmission. Number 1, the tag shows (69) for '69 "model" year, not necessarily the year of assembly. Page 288 of Alan Colvins "By the numbers" book states, "The assembly date code for the 1969 model year starts with the first day of the calender year 1968 and continues into the 1969 model year". I don't have that 3 digit date code in front of me, but based on the 69 in the top left corner of the tag, it is a 69 tranny as well as that is the car it is in. I will try to get that 3 digit date code. It does also has a VIN number stamped on the tranny that matches the '69 cars number.

Also, I believe the yellow tags were normally on the high perf trannys. I am at a total loss.

[JoeC]

The 1969 hi po TH400 is CX code. Post the numbers on your trans tag on pass side and look for a vin no. on the vin pad on driver side just above oil pan.

[SS427]

I don't have the tag in front of me but, it has a large "C" screen printed in the left corner. Than there is a stamped 69-Y-xxx (date). On the right corner is a screen printed "Y". The tag is yellow in color. At the bottom is a stamped number which I am not sure what those stand for. The cars VIN number is indeed stamped on the drivers side so I feel it is an original tranny. This is the missing puzzle if I can just figure it out!

[Mr70]

On page 27 of the Sept./Oct.1969 Chevrolet Service News.
NEW CENTER SUPPORT AND SPACER RING-TURBO HYDRA-MATIC 400 TRANSMISSION.This change became effective with transmisson serial numbers and build date codes as follows:
CA-69-78912 date 464
CB-69-5477 date 465
CC-69-20716 date 464
CD-69-1309 date 472
CE-69-5693 date 471
CF-69-1057 date when built
CG-69-1403 date 472
CH-69-1011 date when built
CJ-69-12871 date 467
CK-69-4661 date 466
CL-69-1945 date 466
CP-69-5068 date 466
CQ-69-17771 date 465
CT-69-98319 date 465
CX-69-3312 date 479
CY-69-1723 date 478

This verifies that that trans.code is indeed legit in a 1969 Chevrolet car.I checked all the issues before and after this and it does not mention applications for these codes.But I would bet my eye teeth it is authentic for that SPECIAL Impala.

[Mrlzybones]

I've got a turbo 400 trans with the code 72-CY- 1732. The tag was striped & painted over however there is still a partial pice of yellow paint near the id tag rivet. The date code is "348". The partial VIN looks to be 12N161400 stamped on the driver's side. The case number is 8623462. From my research this is a 400 with high shift points possibly offered in the high horsepower novas,camaros, chevelles camaros. Any help deciphering would be appreciated.

[William]

It's a 1972 MY trans, built December 14, 1971.

1=Chevrolet 2=1972 N=Norwood. Probably for a 1972 Camaro Z28.

[SS69chevelle]

the chevy dealer service information bulletin no# 69-I-1, dated sept 19 1968 identifies the Y as below:

*Y - 427 Cu in 425 H.P (Chevrolet)
427 Cu in 430 H.P (Corvette)
427 Cu in 435 H.P (Corvette)
396 Cu in 375 H.P (Chevelle, Nova, Camaro)

* High Shift Point

hope this helps, Andy

[Mr70]

Specifically,it is an original 1972 assembled CY Turbo 400,and as William said came originally in a 1972 Z/28 Camaro equipped with an LT-1 350/255HP engine only.