Minor Vibration When Shifting at low RPM.

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jman1200

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My 300k km (186k miles) started vibrating a little bit when shifting (at any gear) at low RPMs. It happens mostly when cold but I've felt it even after driving for a while. The car shifts perfectly above 4k rpms and when flooring it. Currently using a 93 octane Unleashed tune.

Did a drain and refill, last one was in 2020. ATF was not too dark and had no burnt smell. This did not fix the issue.
At times I can observe the rpm gauge fluctuating a little bit, mostly below 2k rpm.

Planning on adding a bottle of Lucas Transmission Fix, many reviews claim that this works for this type of issue.

Anyone know if there is a valve or solenoid that controls how much pressure is applied to the clutches? I have never had transmission issues on any of my vehicles so besides replacing the whole unit, I'm not sure where to start.

Thoughts?
 

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