Left tire makes a sound. It sounds like it is coming from gear box, then the tire locks up, chair cut it's self off. can you help with this problem ?

Do you have standard rims and tires? Any variation there can cause rubbing.

Other possibilities

-one of your full lock steering stops has become loose and is allowing a tire to contact the body.

-the steering box is moving in its mountings, allowing too much lock

first thig is to jack up front or have someone help u lift the chair on a, box that that will just fit between the tires and then put in gear and take nut and washer off then pull tire off if u bought new tires without the rims u need to take to a tire repair shop and have them put them on for u then replace
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If chair has a tilt, recline or lift seat on it it may be going into lock-out mode on its own due to a limit switch fault. If you don't have any of these options then I suggest you remove the joystick, controller and any wire harness between the two and send them to a shop like mine for repair.
The usual lock out light chase is from left to right - not right to left so this is suspect of a different issue.

Sounds like you have a blown seal on your left gearbox. The only permanent solution is to replace the left brake/motor gearbox assembly. Not exactly a do-it-yourself repair. to verify, you can pull the seat off to inspect with a flashlight or tip the chair up at 45 degrees on the right drive wheel to inspect.
In my experience this is a common problem. It may take some time for enough gearbox grease to ooze out and cause the gearbox to fail. If you run the chair inside the house it will get messy very quickly and the grease stains are difficult to remove. If the chair is upwards of 4 or 5 years consider replacing left and right motor/gearbox assemblies. Hope this helps.

Check your tire inflation and treads to make sure they can grip the floor/ground without slipping. Make sure that any keystock/keylock needed is installed on the axle, sometimes they slip out. Are your batteries fully charged and in good condition? Are you over the weight limit for the power chair?
Is there any noise or vibration coming from the power chair as you operate it? A grinding sound may indicate bad bearings in the caster wheels and cause problems in steering. A chirping sound may indicate a bad motor, they may be losing power and are not able to move the power chair evenly.
If your insurance purchased the power chair for you, they may also cover the repairs; contact them for information.
Good luck!

Sounds like the bearing is loose, yes you can do it yourself. Remove the bearing dust cap, do you see a cotter pin, if so jack up the front wheel, remove the cotter pin and locking ring, then place your hand just at the bottom of the bearing, using your other hand gently tap the top of the tire, the bearing should come out, inspect it to make sure it is okay and not in need of replacement, repack the bearing with new bearing grease and reinstall it. Ajust the bearing to 0 play, do this by tightening the bearing nut, and grab the tire at the top with one hand and bottom with the other, then push and pull in opposite directions at the same time, if the tire wobbles then tighten the bearing a little more until the tire will not wobble. Spin the tire around forwards and then backwards serveral time and check for 0 play again. After spinning and 0 play is good, reinstall the nut locking device and cotter pin, and dust cover. Hope this helps, let me know.

its a wheel bearing. .will need to be inspected to determine the correct one. Also tires could also do this if the steel seperated internally. Rotate the suspected tire to see if it follows the tire.

Check the fluid in the the axle. Also make sure the brake isn't locking up. You might want to take the axle gear cover off and see if the "C" clip came off or is broken on the gear assembly. Almost sounds like the differentials is locking up.

I have the same problem, low speeds and only when i turn to the left, steering locks or jams, but only at low speeds, and parking lot manuevers. Will replace gear box, simple 3 or 4 bolts, and can easily be done in a drive way or home garage. Hope this helps! 90% its the gear box even if you have the right one already.
Tips** you should have the 680 gear box and not the old one (670 3 bolt patter). The 680 should have 4 bolts. But there are issues and may need to be replaced. I had a faulty one!

have the play in the steering checked !!!!!!! it can be adjusted but if overadjusted it will turn lock to lock by it self.........