Depends on your definition of "bad". In my book, if a transmission fails to satisfy their army's standards (the Korean transmission failed at about 7,000km when it was required to last about 10,000km in a trial) and the Korean government actively talks about lowering requirements, that's already a red flag.is this Korean transmission really that bad?
And remember, the Turkish government alledgedly said that they would take whatever the Korean government offers IF the Korean government could guarantee durability of the Korean transmission up to the point where it failed (about 7000km) and the Korean government even reportedly refused to do that.
That's sounds pretty "bad" to me, but hey Turkey needs a powerpack to roll out their new MBT for both financial (each month of delay costs a lot of money to all involved companies) and political reasons (propaganda and all).
I mean this is why Turkey has been using American & German powerpacks for their tactical armoured vehicles and other self-propelled military vehicles - they are proven & reliable and they are the best in the industry even though the Turkish government keeps making all the fuss about "indigenous" engines & transmissions for obvious political reasons.