Speedo driven gears for GM Super T10 transmissions. OEM AC Delco gears. Your choice of one gear, please specify:

• 18 tooth brown  dimension -1.75 x .305 x .810
• 19 tooth white    dimension -1.75 x .305 x .810
• 20 tooth blue     dimension -1.75 x .305 x .810
• 21 tooth red       dimension -1.75 x .305 x .810 - out of stock
• 22 tooth grey     dimension -1.75 x .305 x .810
• 18-22T .810 diameter gears must be used with a 1.84 OD speedo drive gear. 
• 22 tooth green   dimension -1.75 x .305 x .870
• 23 tooth black    dimension -1.75 x .305 x .870
• 24 tooth yellow   dimension -1.75 x .305 x .870
• 25 tooth orange dimension -1.75 x .305 x .870
• 22-25T .870 diameter gears must be used with a 1.76 OD speedo drive gear.

  Speedo Gear Chart

  Axle Ratio                   6T                    7T                       8T -Drive Gears

  2.73                            -                         -                       18            

  3.08                            -                       18                       20

  3.27                            -                       19                       21

  3.55                           17                     20                       22

  3.73                           18                     21                       23

  4.10                            19                    22                       24

  4.30                            21                    23                       25

  4.56                            23                    24

• Calculated driven gears are based on normal 26" tires and the formula listed below:

Driven Gear Teeth = Drive gear teeth x axle ratio x tire revs/mile