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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 85 (Manual Transmission - TREMEC 6-Speed (Mg9 M3L)) >> Diagnostic Information and Procedures >> Transmission Noisy >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

If the transmission is in neutral with the engine operating, and a whirling noise - a neutral gear rattle is heard outside the vehicle, the sound is a normal condition.