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    1. · Registered
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      I ran across this on Aliexpress, wonder if that's a viable option?



      Expensive but looks like it has all the parts I need ? Appears to have a transmission, pedal, controller, etc.. only real challenge then is mating up the drive shafts to the front and rear differential
      Yes, that can work... if the gearing is right. That gearbox has a reduction ratio which is suitable to adapt the motor speed to the wheel speed (of some vehicle), but you would be connecting the output shafts to front and rear final drives which each have both a differential and another stage of reduction gearing that multiplies the reduction in the gearbox. The result could be geared too low, meaning too much reduction ratio, meaning that the motor speed would be too high for a given road speed.

      The AliExpress listing specifies a choice of reduction ratios:
      Ratio:6:1/8:1/10:1/12:1
      If you picked the tallest ratio (6:1), that multiplied by the UTV's final drive ratio might result in acceptable speeds, especially since you "Prefer Lots of Torque over speed".

      This approach, of using a complete drive unit intended to be mounted transversely and drive one axle but mounting it longitudinally to drive both axles, has been used in some 4X4 conversions... typically Land Rovers with Tesla drive units. To work in those cases, they change the gearing in the EV drive unit for less reduction, to make up for having the extra gear reduction in the axles; in this case, you can order tall gearing so you may be able to make it work without customization.
       
    2. · Registered
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      32 Posts
      Discussion Starter · #25 ·
      Yes, that can work... if the gearing is right. That gearbox has a reduction ratio which is suitable to adapt the motor speed to the wheel speed (of some vehicle), but you would be connecting the output shafts to front and rear final drives which each have both a differential and another stage of reduction gearing that multiplies the reduction in the gearbox. The result could be geared too low, meaning too much reduction ratio, meaning that the motor speed would be too high for a given road speed.

      The AliExpress listing specifies a choice of reduction ratios:

      If you picked the tallest ratio (6:1), that multiplied by the UTV's final drive ratio might result in acceptable speeds, especially since you "Prefer Lots of Torque over speed".

      This approach, of using a complete drive unit intended to be mounted transversely and drive one axle but mounting it longitudinally to drive both axles, has been used in some 4X4 conversions... typically Land Rovers with Tesla drive units. To work in those cases, they change the gearing in the EV drive unit for less reduction, to make up for having the extra gear reduction in the axles; in this case, you can order tall gearing so you may be able to make it work without customization.
      Thanks for the info ! I will get the gear ratio tonight (I assume mark the tire, make one complete revolution and count the number of times the driveshaft revolves)?
       

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