High Speed Driveline Vibration
Successfully took the truck on a 475 mile road trip recently without issue, except for developing a driveline vibration at high speeds. Here are the symptoms:
- No vibrations until 60mph
- Vibration felt from 60mph-70mph
- Vibration peaks at 65mph then disappears by 70mph
- Vibration seems to be magnified if I take my foot off the gas pedal and let it coast until it gets below 60mph then disappears.
I'm thinking either engine motor mounts or my rear driveshaft. Thoughts?
1988 K10 Suburban. 6.5L NA Goodwrench Engine: 506 block cast on August 12, 1996. Heavy Duty built 700R4. Full-floating 14 bolt rear axle. 3/4ton 10 bolt front. Brand new 305/75R16 Procomp AT Sport tires on brand new 16x8 steel wheels.