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2004 Chevrolet Impala 3.8L 2-1 Downshift Noise
Problem has developed about 15k miles ago. While trans automatically downshifts during normal slow down at about 15 mph (2-1 shift) there is a loud buzz noise and trans pressure rises from ~ 75 psi to 150 psi - foot off gas. Sometimes lasts for 2-3 seconds, so...
FIX posted 7/16/2011
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Related Documents & Media | VIN | 2G1WF55K84 |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Affected | 2-1 Downshift Noise |
| Conditions | Buzzing Noise |
| Misc. | 9C1 Police Model |
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Vehicle Data
2004 Chevrolet Impala
| VIN | 2G1WF55K84 |
| Engine | 3.8 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Affected | 2-1 Downshift Noise |
| Conditions | Buzzing Noise |
| Misc. | 9C1 Police Model |
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