St225 5th gear issue

[Christian1987]

Hi all so my 5th gear won't select , engine on or off , all other gears are fine n there's no clunking or grinding noise , took it to my local garage n turns out I've got a smf instead of a dmf? Any ideas ? Garage recons get another box as all checks been done 

Edited September 29, 2022 by Christian1987
Missed abit out

[unofix]

9 hours ago, Christian1987 said:

so my 5th gear won't select , engine on or off , all other gears are fine n

It would seem it's time to replace the gearbox. 😧