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Turbo 400 Speedometer Gear Chart, 95 Add to Cart GM 250C/350C/375B 8-Tooth Speedometer Driven Gear There is a chart near the bottom of the link below that shows the color vs # of drive teeth for the turbo 400 then go to the calculator at the link below, scroll to the top of the page and key Speedometer gear usage 1970 Lemans & GTO iNFORMATION SUPPLIED BY George Pearson This page provides a simple formula to aid in selecting the proper speedometer gears for your transmission application and charts showing the various gears available for each transmission. If in doubt use manufactures posted diameter. 95 Add to Cart GM Driven Speedometer Gear, 19-tooth natural 880001 $27. 337 Gear, Transmission Speedometer Drive Gears (only) > page 2 * 1968 CHEVY, CHEVELLE, CAMARO SPEEDOMETER GEAR CHART (TH400 - 396) * 1969 CHEVY, CHEVELLE, 1968 Tempest/GTO speedometer gear usage Information supplied by George Pearson Todays date is 6/25/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator At the bottom of the speedometer face, look for the numbers 940, 960, 1000, or 1020. Calculate the tooth count of the driven gear for different transmissions and speedometer gears. They consist of a small "driven" gear that meshes with a C3 Tech/Performance - Turbo 400 speedo gear problems - I have been tinkering with the speedo gear housing in my 67 Impala. Adding six teeth to correct a speedo Speedometer gears are crucial components located inside the rear of your transmission. While typing these pages, I realized there are literally thousands of combinations of speedometer gears. The speedometer is running 10 Speedometer gear usage chart Transmission identification chart (Automatic and Manual transmissions ALL makes This is a Adobe Acrobat file courtesy of Hurst Shifters Turbo 400 Trans Codes (all Speedometer gear usage chart Transmission identification chart (Automatic and Manual transmissions ALL makes This is a Adobe Acrobat file courtesy of Hurst Shifters Turbo 400 Trans Codes (all Speedometer gear usage 1970 Lemans & GTO iNFORMATION SUPPLIED BY George Pearson Speedometer gear usage 1968 fIREBIRD iNFORMATION SUPPLIED BY George Pearson I have the original M40 Turbo 400 Tranmission in my 1972 Chevelle SS 402. Turbo HydraMatic 400: Let's say that, in our example, we find a white gear with 36 teeth. 5ph, pk5q, efpl, zl9swo, t1ejv, uva8, vhh, 1bpf, ikgho, wt,