Recommended a BLDC Motor with Worm Gearbox for Amusement Ride Vehicle

Hello, everyone!
I am looking at the 5HP (3.8kW) brushless DC motor, 48V. We are building a 2-seat amusement ride vehicle that will have a max load of 1200 pounds and go 3 mph to 10 mph.
Here are our questions:
1. We need a worm gearbox. Is there an option for this to work with a worm gearbox?
2. What are the decibels of this BLDC motor?
3. What does 85% efficiency mean?
4. What is lead time?
5. Do you have an option to get an axle, transaxle, or differential?

Torin wrote:
Hi, Torin,
1. 5hp (3.8kW) brushless DC motor, 48V can be equipped with a worm gearbox, but the motor speed is recommended to 2000rpm, otherwise the noise will be very loud.
2. The decibel of the motor is less than 55dB.
3. The efficiency of the motor is about 80%, which refers to the ratio of the electrical energy input to the mechanical energy converted by the motor.
4. Lead time of customized motors is usually more than 30 days.
5. There are no such options to get an axle, transaxle, or differential.