Back wheels make a loud clicking noise

Hi. Loud clicking noises from the rear wheels are usually caused by movement of the square steel key that fits into a groove on the axle inside the wheel hub. This is what drives the wheels.
You will probably get a click for each revolution of the wheels.
To fix it, remove the rear wheels and wipe a thin smear of grease on the key and axle, then replace the wheels.
The grease will allow the key to move slightly without making a noise, and help stop it from wearing.
It sometimes helps to also remove the front wheels, and wipe a thin smear of grease onto the front stub axles. There is no key in the front hubs, but the grease helps to prevent the bearings siezing on to the axles.
Good luck. Neil.

Good advice from scooterworks. I had a Go-Go customer that complained about clicking from the rear wheeels. Since she was under warranty for parts still, I followed Tech Support's advice and replced the entire transaxle unit. She called back in a week and said the problem had started again. I talked to a more experienced tech this time and he recommended that I simply swap the rear wheels around, and this has apparently been a permanent fix for her. I did grease the keyways while I was reassembling for good measure.

I found an answer and solution to the clicking or clunking coming from the rear of my GoGo. Here it is:

"This can be caused by two things usually. One cause is the bolt holding wheel to the axle is a little loose so check to make sure it is very tight on the axle. The second click comes from flat-free tires. The tires have an adhesive applied at the factory and if you hit a bump, or if there's not enough to hold the tire tight to the rim, the tire will make a grinding click noise when it rolls and passes over this area. Pneumatic tires properly inflated don't make this noise since the air pressure keeps the tire fixed to the rim at the bead; flat free tires lack this pressure. Simply lubricate the area around the tire where it meets the rim on inside and outside, and drive it...noise should dissipate."
http://www.fixya.com/support/t2847914-click_clunk_when_moving_from_right_rear

Mine was the tire/rim problem. Here's what I did:
1. Separate rear and front sections of the scooter
2. Stood the back up so it was setting on the outside of the right wheel, the left wheel up in the air, horizontal.
3. Sprayed a bead of silicone lubricant around the rim on the outside of the left wheel and the inside of the right wheel.
4. Sprayed around the axle at the wheel, and at the bearing (both wheels)
5. Let the back end sit in that position about 5 minutes.
6. Turned the back end over so the right wheel was up and it was resting on the left wheel. Repeated 3 - 6 until each wheel had been sprayed on the inside and outside three times.
7. On the third repetition I used my thumb to press the rubber around the rim, inside and outside on both wheels.
8. Repeated 3 & 4.
9. At this point the rubber on the wheels was feeling softer and would compress and release.
10. Put the front end and back end together, and drove in silence.

Hope the good tip I got might help someone else!

Unable to get the wheel off my 7-year old Go Go Elite, I tried tipping it over and spraying WD 40 on each wheel, a healthy amount, and so far so good.