Clunking sound during shifts already replaced all mounts (Mk7 ST, 25,000 km)

[JoshFiestaST]

I’ve been chasing a clunking noise on my 2017 Fiesta ST (25,000 km) for a while now and can’t seem to figure it out.

It started right after I did a bunch of hill starts when I was practising for my licence test. Here’s what I’ve done so far:

Replaced all three engine mounts (left, right, and torque mount) when i replaced the torque mount i had a fair improvement where around 50% of the clunks sound went away.

Noticeable clunk every time I shift from 1st to 2nd, 2nd to 3rd, and faintly 3rd to 4th

When I press the clutch, move the shifter from 1st to N i get a clunk Then N to 2nd clunk again I can also get the same clunk if I just tap the throttle in 1st/2nd (on-off throttle).

If I shift really really slowly i wont get a clunk noise.

if anyone knows what it is please let me know 😭

 

[TyphoonFiST]

Could be the DMF/ Dual Mass Flywheel*

 

[Tim_021]

This really sounds like a dual mass flywheel issue indeed, most likely the springs in the dual mass flywheel are either worn, or broken. If you press the clutch and rev a couple times and you still hear clunking or rattling i'm very certain it is the dual mass flywheel

 

[Stupidbutt]

Mine did this also. check the exhaust mount after the down pipe. If broken, it allows the exhaust pipe to hit floor when you tapp the gas.

 

[SteveS]

Just as an aside you know you don't have to worry about hill starts. The Fiesta ST has an automatic hill hold feature. No need for high revs/handbrake, jumping off the clutch etc. Just a normal start.