The "clutching" was made possible by 3 solenoid valves and micro switches. These also controlled the high torque[hydraulics in parallel] and low torque[hydraulics in series] settings for the axel. The system on the Deere 20,30, and 40 series probably worked better in theory than in actuality even with the 4 cubic inch per revolution close centre pump. Combine hydrostats operate at much higher pressures so had alot more torque. MF rules, I think it would be quite a project but I would be afraid it would have disappointing results. Ever consider an older 4 wheel articulated?....Ron
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