Weird DCT downshift! Help!

[sahanMpower]

Hey guys, I’m having this weird downshift that happen sometimes and what cause of it?

Mine is on SC and SSP clutch.

Here the video;

https://youtube.com/shorts/cnj07rC7A...5ZJFW-iEpjuYGm

[sahanMpower]

bump

[M3SQRD]

You’re basically running the motor at the lowest possible rpm in each gear to match road speed at 1k rpm between gears as you come to a stop. It seems the required throttle blips barely, if at all, raises the rpm to engage the next lower gear. It’s almost like it initially applied too little throttle and has to blip the throttle a second time to better match rpm-speed between gears. Is there a reason why you’re inching along at such slow speeds requiring repeated downshifts at 1k rpm?

Does it do this if you repeatedly pull the downshift paddle at, say, 2k rpm as you come to a normal stop? Not sure if this is a real problem or if it’s the DCT TCU having trouble matching speed and rpm between downshifts at 1k rpm?

[Beamerluv]

Did you figure anything out about this OP? I am having a similar issue.

[Beamerluv]

Bump, anyone know anything about this?

[TboneS54]

What DCT tune? Try GTS (773) or the latest u.s. (869) - they're supposedly smoother.

[Beamerluv]

I have the GTS tune from Alpine mss and have this issue

[sahanMpower]

still no clue guys! This happened rarely tho…

[Beamerluv]

Solved my problem! I was having this same issue and replaced my fluid and filters and it completely got rid of the issue! Transmission shifts beautifully again! Fluid was changed 30k miles ago. Changed it again at 142k miles.