Disconnect the gear selection cables
undo the 6mm bolts around the housing and lift out the gearselector housing , if you are lucky with a sharpe pointed screw driver you can turn the brokern bolt and screw it out, if not you have to drill, use an easyout or re_- tap the thread. Purchase a new bolt from Fords and fit with a dab of locktight. Apply sealant to the housing and refit.
IT IS VERY IMPORTANT TO FISH OUT THE BROKERN BOLT (SOMETIMES THE WHOLE BOLT DROPS INTO THE GEARBOX)
IF YOU DONT IT VERY OFTEN JAMS THE GEARS AND CRACKS THE GEARBOX CASING.
On the later models it is common for the bolt on the outside of the selector assembley to break/ drop out making you loose all your gears.
pj
July 2015