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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.

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Old 09-30-2019, 08:05 PM   #1
Andy2002a
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Vibration at 2500rpm when decelerating

I just swapped out my stock clutch for an ACT SB7-HDSS (lightweight 11.8lb flywheel) this weekend. Now I'm experiencing noticeable engine/transmission vibration from 2200-2700rpm with the bulk of the noise/vibration at 2500 rpm. This is only apparent during deceleration.

Is this expected with a light flywheel, or do I maybe have a different issue?

Everything lined up correctly when we mated the transmission to the engine, and all of the usual clutch swap parts were changed (fasteners, throw out bearing, fork, etc.)
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Old 09-30-2019, 10:09 PM   #2
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Old 10-01-2019, 12:23 AM   #3
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Two people with same problem evidently
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