I have a Bolens Mod# 13am762f765. I had to remove the trans axle and when I replaced it it will only run in low speed. It is a transmatic and with lever moved to 6 it still runs slow. When replacing rods the only way it runs at all is with brake rod in bottom hole on pedal assembly drive rod. It shows to go in the slotted area but will not work in that place. Thanks bunches for any help.