Overdrive, How it works
Overdrive in general(TSSC)
Overdrive Conversion Kit, Canley Classics
Overdrive Oil(TSSC)
Which overdrives for a 13/60(TSSC)

Overdrive, How it works1

Overdrive disengaged


A cone clutch (A), mounted on the externally splined extension of the sungear (G) is spring-loaded, by four clutch springs (L), via a thrust ring (K) and bearing (M), against the annulus (E) thus locking the gear train and permitting overun and reverse torque to be transmitted.

Overdrive engaged


When overdrive is selected, two hydraulically operated pistons (I) acting against bridge pieces (J), move forward and, overcoming the springs pressure, cause the cone clutch (A) to engage the brake ring (B) with sufficient load to hold the sungear (G) at rest. The planet carrier (D) can now rotate with the input shaft (H) causing the planet gears (F) to rotate about their own axis to drive the annulus at a faster speed than the input shaft, this being allowed by the free-wheeling action of the uni-directionnal clutch (C).

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