older sears simplicty rear end

[mrwood50]

we have a older simplicty that someone has done a lokrd rear end on. Our new pulling rules say we cant use this anymore. But i dont know where or how to take the rear end apart, I have been told that some gear or gears were just turned around in it. please can anyone help, or show me where these gears are set up. It also has high and low on the transmission. Thanks for any help.

 

[mechanic mark]

Please post all numbers from tractor, year, model, engine numbers, etc. from all data plates. Also post pictures of tractor if you can.