Jump to content
  • Decoding 1972 Protect-O-Plate

     

    1972 Labelled Sample.png

    Note that there are some plates that do not have all of these details but it is not common.

  • Vehicle Identification Number
    See VIN decode page

    Carburetor Manufacturer 
    B - Bay City
    C - Carter                
    R - Rochester

    Engine Info
    Assembly Plant
    F or V - Flint, Michigan
    K - McKinnon Industries
    T - Tonawanda Engine Plant

    Assembly Date
    Month
    01 - January
    02 - February
    03 - March
    04 - April
    05 - May
    06 - June
    07 - July
    08 - August
    09 - September
    10 - October
    11 - November
    12 - December
    Day   
    01 to 31

    Engine Suffix Code
    CDA - 350 ci 2-barrel with manual trans
    CDD - 350 ci 4-barrel with TH 350 trans
    CDG - 350 ci 2-barrel with manual trans
    CKA - 350 ci 2-barrel with manual trans
    CKB - 350 ci 2-barrel with TH 350 trans
    CKD - 350 ci 4-barrel with TH 350 trans
    CLB - 402 ci 4 barrel with TH 400 trans
    CMD - 350 ci 2-barrel with TH 350 trans
    CPD - 454ci 4 barrel with TH 400 trans
    CRW - 454ci 4 barrel with TH 400 trans
    CTB - 402 ci 4 barrel with TH 400 trans
    CTL - 350 ci 2-barrel with TH 350 trans

    Rear Axle Info
    Axle Prefix Code
    CF - 3.31:1 with Positraction        
    CH - 2.73:1 with Positraction        
    CW - 3.31:1        
    GA - 2.56:1        
    GB - 2.56:1 with Positraction        
    GC - 2.73:1        
    GD - 2.73:1 with Positraction        
    GH - 2.73:1
    KD - 2.73:1   
    RU - 3.31:1        
    RV - 3.31:1 with Positraction

    Assembly Plant
    C - Buffalo, NY            
    G - Chevrolet Gear & Axle            
    W - Warren, MI            
    K - McKinnon Industries

    Assembly Date
    Three digit Julian date starting with Jan 1, 1970
    Example: 028 is January 28, 1970. 365 is December 31, 1970.

    Shift
    1 - First shift
    2 - Second shift
    Note that not all plates have shift codes

    Positraction Code
    E - Eaton Positraction

  • Assembly Month
    H - August
    J - September
    K - October
    L - November
    M - December            
    A -January            
    B - February            
    C - March            
    D - April            
    E - May            
    F - June            
    G - July

    Transmission Info
    Turbo Hydra-Matic 400

    Model year
    72 - 1972 model year

    Engine Type
    D - 402 engine
    F - 454 engine

    Date of Build
    Three digit Julian date starting with Jan 1, 1971

    All other transmissions

    Assembly Plant and Transmission Type
    B - Cleveland Turbo Hydramatic 350        
    D - Sagiunaw 3-speed manual
    J - GM of Canada Turbo Hydramatic 350
    K - McKinnon Industries 3-speed Manual        
    M - Muncie 3-speed manual        
    O - Saginaw
    S - Saginaw 3-speed manual
    W - Warner Gear 3-speed manual
    Y - Toledo Turbo Hydramatic 350

    Year            
    2 - 1972 model year        

    Assembly Month            
    M - August
    P - September    
    R - October    
    S - November    
    T - December    
    A - January    
    B - February    
    C - March    
    D - April    
    E - May    
    H - June    
    K - July

    Assembly Day
    01-31

    Assembly Shift
    D - Day shift
    N - Night shift
    Note not all plates have shift codes

  • Recent Posts

    • They must build houses out of concrete in coatal areas. 180 wind gust and no major damage except the surge.  Around here stuff falls apart with 100 mph weak tornadoes
    • Ok well let's lock in May Somerset KY.   I'll reach out to the organizers again. I already have some info.
    • All I remember is: the 1156 bulb has ONE element and ONE spot to connect power to, via the socket. It is used in the Back Up lights. the 1157 bulb has TWO elements and TWO spots to connect power to via the socket and I believe were the only ones used in the Ft (one bulb each side) and Rear (Two bulbs each side) T/S and illumination.  The small little lights are used in the side markers. I bought some replacement 1157 bulbs over 10 years ago, and they had a slightly smaller base and it was loose in the socket causing some intermittent problems. I bought some higher quality bulbs and they fit much better / tighter. GROUNDS are very important and need to be checked. Side story, It's 1969 and My friend was replacing a bulb on the taillight of his 64 Chevy but couldn't get it to work. I took a look and found he had jammed a 1156 into a 1157 socket!!!!!!!! Dah.. Good times... ALSO!!! What is not stock or was changed? The largest cause of taillight and T/S problems I remember repairing, is after someone ADDS A TRAILER HITCH WITH WIRING!!! or a an "A Pillar" adjustable spot light. 
    • Yes, early 700r4's had 27 spline input shafts. The 2200-2400 should be a nice compliment to your combo. 
    • I got my 700r4 transmission ID #  9TK061D. So according to my research it is a 1982 with a 27 spline input shaft, and I'm going to look for one that has 2200 to 2400 rpm stall. Can anyone verify if I identified the right transmission. Thanks.
×
×
  • Create New...