Speedometer gearing charts

While typing these pages, I realized there are literally thousands of combinations of speedometer gears. Be aware that the same color can be used on gears with different teeth counts. When I finish typing all the pages, I will try to organize it a little better. Email me if you have any questions or comments. Thanks to George Pearson  for the info!

Click here for the tire size conversion chart

speedo gear color chart

Turbo 400 (M-40)

Turbo 350 (M-38)

2 Speed Automatic

3 Speed Manual

4 Speed Manual

1965 ALL

1964 GTO


1964 Fullsize

1966 ALL

1965 GTO


1964 GTO

1966 GTO


1965 Fullsize

1967 Fullsize

1967 GTO


1965 GTO

1967 Firebird



1966 Fullsize

1967 GTO



1966 GTO

1968 Fullsize



1967 Fullsize

1968 Firebird



1967 GTO

1968 GTO



1967 Firebird

1969 Fullsize


1968 Fullsize

1969 Firebird


1968 GTO

1969 GTO & GP


1968 Firebird

1970 Fullsize


1969 GTO & GP

1970 Firebird


1969 Firebird

1970 GTO

1970 GTO

1970 Grand Prix

1970 Firebird

1970 Grand Prix

1971 GTO

1971 Firebird

1971 Grand Prix

Sorry, no information on
1969-1971 Fullsize cars with 4 speeds

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