Hello all,

I have a 2009 Skoda Superb 1.8TSI. It runs on a 7-speed DSG.

Lately due to a leak in air intake system, sent to a workshop that diagnosed the flywheel seal is leaking. Proceeded to replace the seal and shop also replaced the flywheel (possibly the issue here?) that had large freeplay. The replaced flywheel is from a Passat. Since then, the drive has been experiencing abnormal driving, from jerks, knocks then to bangs between gears. It struggled most with bangs on up slopes. Shop resetted the basic settings (Group 60 Auto Trans: 4,0,0 > 254,0,0) several times. After each reset, it ran well for a mere 15km and the issue came back. VCDS scan threw 3 fault codes under Auto Trans. 

I've been reading that the flywheel teeth count maybe the issue. Following from there, i read that the Transmission Input Speed (743/min) and Engine Speed (761/min) should match when average, else it would mean the flywheel teeth count is not correct. Could anyone verify this as I need to take the next step if a proper flywheel with the correct teeth count should be the way to go ?

Or any suggestion on the possible causes to the knocks and bangs?

Thank you :)

Log-SNL722X-TMBBB93T399038280-146200km-90844mi.txt

Is there a way that i can share the VCDS scan log embedded in the thread there and not as attachment?

Attachment is better, otherwise the post becomes much too long.

Your problem however is probably the fly wheel. It looks like the mounted the wrong one.
I also do not understand why you bought a used fly wheel? This is probably the dual mass one, and these wear. Especially in such a difficult to get to location, I would always use new components. The risk of premature failure with a used part is much too high.

Hey thanks for the feedback. The flywheel installed is a new one but I suppose that the shop made the assumption many parts are interchangeable btw a Skoda and Passat. I've just made an order from Skoda-parts and verified with them my VIN, paid and hope to receive it soon.