sweeper

Is my transmission in dire need of a service? 159,000km. Reversed into my drive the other day, temperature around 37-38 deg C, air con full, get the back wheels up and over then the front won't go over.. up a 2" 45 deg slope! raise the revs and it still won't pull the skin of a rice pudding!. go forward, get a run up, and up and over. I cannot believe that this is normal.

Transmission (sealed for life) service time?

Thanks for any advice

Bob