www.firstgenerationmontecarlo.com
border

Club Information
  Mission Statement
  Benefits
  How to Join
  Renew Membership
  Official Club Merchandise
  Home Page

Meet Info
  Eastern Meet
  Western Meet

Interact
  Message Forum
  Chat Room

Photo Album
  Members' Montes
  FGMCC Meet Photos

Resources
  Technical Info
  Museum
  Parts Sources
  Monte Carlo Registry
  Links

Contact Us
  Club Officers

Facebook

SEMA SAN

Technical Information
Decoding Rear Axles

border

1970

The 1970 Monte Carlo is a year that is unique to the first generation of Monte Carlo’s. It is the only year that Chevrolet had the three-digit rear axle ratio identifier “CCH for example all of them started with C for Chevrolet” and the only year that they had a month and day code “01 23 known as January twenty third” for the Monte Carlo. The information that will follow will be from several sources and they will very in accuracy. So believe only what you can confirm as the truth. Two out of the three books are very similar to each other and are approved by general motors but they do not guarantee their accuracy.

1970 Monte Carlo Rear Axle Decoding

C GB 10 05 B E

1.) Vehicle installed in:

  C= Chevrolet

2.) Rear Axle Types:

1970 AXLE CODES & RATIOS

From Chiltons manual:

CCA 3.08 CCD 3.07 CCE 3.08 CCF 3.31 CCH 2.73 CCN 2.56 CCO 2.56 CCP 2.73 CCW 3.31 CCX 3.07 CGA 2.56 CGB 2.56 CGC 2.73 CGD 2.73 CGG 3.36 CGI 3.36 CKC 2.73 CKD 2.73 CKF 3.55 CKJ 3.55 CKK 4.10 CRJ 2.56 CRK 2.56 CRU 3.31 CRV 3.31 CRW 4.10 (CF 3.31 CW 3.31 KD 2.73 CH 2.73) “ The last four codes most likely were a mistake from the author because they should be “CCF, CCW, CKD, CCH”

From Haynes manual:

CCG 3.36 CCP 2.73 CGF 3.08 CCH 2.56 CCW 3.31 CGG 3.36 CCL 2.56 CCX 3.07 CGI 3.36 CCM 2.56 CGA 2.56 CKC 2.73 CCE 3.08 CCN 2.56 CGB 2.56 CKD 2.73 CCF 3.31 CCO 2.56 CGC 2.73 CKF 3.55 CGD 2.73 CGE 3.08 CKJ 3.55 CKK 4.10 CRJ 2.56 CRK 2.56 CRL 3.07 CRM 3.07 CRU 3.31 CRV 3.31 CRW 4.10 (CF 3.08 WF 3.23 CH 2.73 XC 2.78 CW 3.31 XE 3.08 KD 2.73 XF 2.73) The last eight are the same thing as the Chiltons manual most likely a mistake was made but just in case there they are.

From the Chevrolet by the numbers book:

CCA 3.08 CCB 3.36 CCD 3.07 CCE 3.08 CCF 3.31 CCG 3.36 CCH 2.73 CCL 2.56 CCM 2.56 CCN 2.56 CCO 2.56 CCP 2.73 CCW 3.31 CCX 3.07 CGA 2.56 CGB 2.56 CGC 2.73 CGD 2.73 CGE 3.08 CGF 3.08 CGG 3.36 CGI 3.36 CKC 2.73 CKD 2.73 CKF 3.55 CKJ 3.55 CKK 4.10 CRJ 2.56 CRK 2.56 CRL 3.07 CRM 3.07 CRU 3.31 CRV 3.31 CRW 4.10

3.) Month Codes:

1= January  2=Febuary  3=March  4=April  5=May  6=June

7=July  8=August  9=September  10= October  11=November  12=December

4.) Day Codes:

05= fifth day of the month “1-31 days”

5.) Plant Source:

G= Detroit Gear & Axle         B= Buffalo NY                 W= Warren MI

6.) Positraction sources:

D= Dana Positraction Differential                 E= Eaton Positraction Differential                 W= Warren Motive

If your car did not have a positraction source code it does not have positraction.

1971 and 1972

1971 & 1972 Monte Carlo Rear Axle Identification

The 1971 Monte Carlo is a year that is unique to the first generation of Monte Carlo’s. It is the year that Chevrolet went to the two-digit rear axle ratio identifiers “CH for example” and the first year they used a Julian date “001-365.” The 1972 Monte Carlo is a year that is unique to the first generation of Monte Carlo’s. It is the year that Chevrolet did not make a super sport but instead made a Monte Carlo Custom. As stated before the information will be from several sources and they will very in accuracy. So believe only what you can confirm as the truth. Two out of the three books are very similar to each other and are approved by general motors but they do not guarantee their accuracy.

1971 & 1972 Monte Carlo Rear Axle Decoding

KD C 314 2 E

1.)      Rear Axle Types:

1971 AXLE CODES & RATIOS

From the Chiltons manual:

CF 3.31 CW 3.31 GA 2.56 GB 2.56 GC 2.73 GD 2.73 GF 3.08 GG 3.36 GH 2.73 GI 3.36 GN 3.08 KD 2.73 RU 3.31 RV 3.31 RW 4.10

From the Haynes manual:

CW 3.31 GC 2.73 GD 2.73 GF 3.08 GG 3.36 GH 2.73 GI 3.31 GN 3.08 KD 2.73 RU 3.31 RV 3.31 RW 4.10

From the Chevrolet by the numbers book:

CF 3.31 CH 2.73 CW 3.31 GA 2.56 GB 2.56 GC 2.73 GD 2.73 GF 3.08 GG 3.36 GH 2.73 GI 3.36 GN 3.08 KD 2.73 RU 3.31 RV 3.31 RW 4.10

1972 AXLE CODES & RATIOS

From the Chiltons manual:

CF 3.31 CW 3.31 GF 3.08 GG 3.36 GH 2.73 GI 3.36 GN 3.08 RU 3.31 RV 3.31 RW 4.10

From the Haynes manual:

CW 3.31 GC 2.73 GD 2.73 GF 3.08 GG 3.36 GH 2.73 GI 3.31 GN 3.08 RU 3.31 RV 3.31 RW 4.10

From the Chevrolet by the numbers book:

CF 3.31 CH 2.73 CW 3.31 GC 2.73 GD 2.73 GF 3.08 GG 3.36 GH 2.73 GI 3.36 GN 3.08 KD 2.73 RU 3.31 RV 3.31

2.) Plant Codes:

  • B= Buick

  • C= Buffalo

  • G= Detroit Gear & Axle

  • K= GM of Canada

  • O= Oldsmobile

  • P= Pontaic

  • W= Warren MI

3.) Julian Date/Day of Year:

  • 001-365

4.) Shift Codes:

  • 1= 1ST Shift

  • 2= 2ND Shift

  • 3= 3RD Shift

5.) Positraction sources:

  • D= Dana Positraction Differential

  • E= Eaton Positraction Differential

  • W= Warren Motive Positraction Carrier

If your car did not have a positraction source code it does not have positraction.

 Thank You Alex for taking the time to research, and write all of this out for us.

border

© 2017 FGMCC  

Home Page
Mission|Benefits|Join|Renew|Merchandise
Message Forum|Chat Room
Members' Montes|Meet Photos
Tech Info|Museum|Parts|Registry|Links|Contact Us

border