Speedometer gears include both the drive gear and the driven gear. The drive gear refers to the gear that is on a transmission s output shaft. The driven gear is located in a removable housing, usually in the tailhousing, of transmissions. *Be aware that some transmissions will have different driven gear housings depending on the tooth count of the driven gear. TCI stocks popular speedometer gears for GM and Ford transmissions. The following formula will work for any GM or Ford vehicle and is very useful when there is no established baseline from which to work, such as replacing a transmission in a vehicle that was purchased without a driveline.

38 Tooth GM Speedo Drive Gear.

Application

4L60E
700R4
TH200
TH350
TH400

Warranty Information

TCI Automotive provides a limited warranty covering manufacturing defects for 30 days on racing equipment and 90 days on street/strip equipment, valid only for the original purchaser with proof of purchase. Approved transmission fluid and cooler flush products are required, and claims must be authorized through Edelbrock Group Tech Support. The warranty excludes modified, improperly installed or maintained, abused, accident‑damaged, improperly cooled, or unauthorized repaired products.

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