6th gear randomly shifting back between 5th and 6th gear, manual, mk7

[Dream Making]

Hi
I have a very weird issue in my Fiesta st mk7
When I'm on the Highway, at 120kmh, in 6th gear, the gear lever randomly Starts to rattle and wants to shift on his own In 5th gear. Sounds like it stays in "neutral" between 5h and 6th gear. Revs goes up and I have to manually shift back in 6th gear. Doesn't happen too often. In a 200km trip it happened 4-5 times.

Something to consider is that my passenger side motor mount, might be a bit worn out. I hear some rattling when the car is cold coming from the mount and my engine does move a bit on acceleration (is dead still at idle tho)

Thanks a lot for your answers

 

[Sam4]

that was the beginning of the end of my imput shaft and various transmission bearings. 6th with a load and its pops out

 

[Dream Making]

that was the beginning of the end of my imput shaft and various transmission bearings. 6th with a load and its pops out

oh no. How did you solved it?

 

[Sam4]

sorry - terminal. The trans has a history of self-detonation and many posts to review on this site. I ended with warranty (!!) rebuild under 60k, with a repeat death at 115K. I bought a remanufactured trans from Clarke in FL/USA, you may need to discover pumaspeed in the UK.

and sorry - 'input' shaft, not my guttural philly 'imput'...

 

[Dream Making]

Oh damn. So am I cooked? How can this transmission be that bad that needs rebuild every 50k miles?

 

[rallytaff]

Transmission still good at 114,767 miles!

 

[Sam4]

just relaying my experience - your mileage may differ!