Buick PA shutters at exactly 50mph
#1
Buick PA shutters at exactly 50mph
My 2001 Park Ave with 77000 miles has started to shutter when the engine is under load and hits 50mph. It stops shuttering at 53mph. But this only happens when accelerating or going uphill. The vibrating is pronounced and seems to be getting worse. Any ideas where to start troubleshooting (tires, bearings et al)?
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