Damiennik23

Hi
am having the following problems and any help would be greatly appreciated
had intermittent problem with selecting reverse and now would not select any gears turned engine off then on all good
replaced the radiator fan, all good yesterday on cooling good and then heat felt coming through
if the transmission valve body needs replacing would that give you a slight smell of over heated oil
does anybody know if I can use the larger fan from an AMG e55?
Thank you