My Snapper Hi-Vac 28" sit-down rear-engine mower has been struggling up hills recently. I looked at the manual, and then some youtube stuff. A trip to the dealer was needed, I bought a friction drive disc.
Today I put it on, working in the sun, man, it was hot. I had to take a couple breaks because I just wore-out. The operation was a success, the patient lived. My 5 speeds are back!. The last cut (Friday) before I replaced the friction drive disc, the mower would barely ascend a modest Florida hill, in the lowest gear, fuhgeddaboutit for the higher four gears. No issues now.
One of the best things, I swapped a Gearwrench metric ratcheting combination wrench set to another GJ member for a SAE set, and the wrenches helped me today in the work. Thank-you to JohninCM.