Rear wheels spin but not really helping move the mower forward

[hikerguy]

Not a problem, just didn’t want someone else to think it was rear wheel. Just would like to see how the OP will install screws in those tire. Will probably look like the studded snow tires we used to have in Wisconsin in the fifties. Dug in but really tore up the roads.

This IS a rear wheel drive push mower. That's why I'm picking it up off the ground to confirm the wheels are spinning .

And yes, it does look like studded tires LOL #8 x 3/4" sheet metals screws and BMX mountain bike tires cut to size. Didn't help, but if I do get this fixed, I'll have traction now

 

[Rivets]

As soon as you sent the mower down either the belt starts to slip or in your case the piñon and bevel gears are to worn to stay engaged. One other case may be that you don’t have the traction cable adjusted properly. Shows you how to do this is your owners manual. I do know what you have, I’ve been working on Toros for the last 40 years, and I think I have a pretty good idea how they work.

 

[bertsmobile1]

Jack your car up in the air.
Set it in neutral & start the engine.
The wheels will spin
drop it on the ground & they will top.