Just like the clutch however, the overdrive's clutch can suffer damage or premature wear from continuous abuse. You can engage or disengage at any throttle just like you could engage or disengage the clutch under any load. If for any reason the overdrive does not disengage, do not reverse the car otherwise extensive damage may result.Īny thoughts on the throttle position the handbook espouses? In certain driving conditions while traveling in third gear, the overdrive can be switched in to provide a top gear ratio or out to provide third gear acceleration without the necessity of manually moving the gear-change lever. Do not 'switch out' the overdrive when traveling at speeds exceeding normal third or top gear road speeds. If increased acceleration is required the overdrive can be 'switched out' without alteration to the throttle setting. Overdrive can be engaged at any throttle opening when in third or top gear. ![]() Accelerator pedal pressure should be maintained and it is not necessary to depress the clutch pedal during engagement or disengagement. To engage overdrive move the switch lever towards the steering-wheel to disengage move the lever away from the steering-wheel. 1971 MGB Tourer and GT Handbook wrote:The overdrive unit, controlled by a switch on the steering-column, provides a higher driving ratio for use with third or fourth gear.
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