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Forte’s Parts GM Mechanical Speedo Adapter

Forte’s makes this speedo drive different than all competitors. This features a double lipped seal exactly like GM made their speedo drive.
This includes Speedo drive, retainer clip, speedo driven gear with 16 – 21 tooth.
this also fits C-4, C-6, FMX, AOD & Toploader 4 & 3 speed, Tremec T-56 Magnum, Tremec SROD, Ford T-5 transmissions.


  • This specially made Speedometer adaptor has an additional sealon the face of the component that guarantees it will not leak.
  • Designed my Mike Forte.
  • Allows the use of a GM Speedometer on a Tremec TKO 500 or TKO 600 Transmission
  • Gears available in 16,17,18,19,20,21 tooth count. (TKO-500,600, T-5 and T-56 ONLY)
  • Note: Available for Ford Toploader 4 speed, C-4, AOD