If your Precedent Club Car golf cart takes off fast but quickly slows to a crawl the you probably have a bad speed sensor.
In this video he shows you how to replace a speed sensor on a Club Car Precedent golf cart with an ADC Motor. A bad speed sensor on your Club Car motor is a common reason for these slowing speeds. First check the motor of your Precedent to make sure that you get the correct replacement part. There can be two different motors on a Club Car Precedents. A speed sensor can also be found on different EZGO and Yamaha models as well.
If you have a DS or Precedent ADC Electric Golf Cart Motor on your cart the speed sensor will look like this. You can buy that Precedent Speed Sensor here.
If you have a KDS motor on your Precedent the end cap is more round and you can find a speed sensor that fits the that motor here.