Hi, put my 3 Door away at the end of last summer everything working well. It went for its MOT yesterday, passed which was a huge relief, but on the way home I was unable to select 5th gear. Hadn’t been a problem on the way there. Took it out again this morning and I can get fifth but very sticky (not sure if that is the right word). First thoughts are low on gear oil get some new oil and change it and do the diff while I am at it. Does anyone know which gearbox oil I should use and which rear diff oil to use?

Anyone else had a similar problem?

Many Thanks in advance!