80mph shakes

[HarveyMushman]

Took my '20 RWD on a highway trip this weekend. We were lightly loaded for tent camping. Cruising up to 75mph was no issue. However, at 80mph, under load (up hills), the truck started shaking/vibrating. Could feel it in the steering wheel, seats, floor, etc. No issues at the same speed going downhill. I tried locking out 10th and 9th gear--no improvement. Any ideas before I present it to the dealer?

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[DukeCanBuildit]

Thereare few different threads on Driveshaft Phasing. You’ll find some light reading here…

https://www.ranger5g.com/forum/threads/driveshaft-phasing.7614/


There will also be Similar Threads listed below that one.

 

[Porpoise Hork]

Get the tires re-balanced. Not sure what the XL has but the stock Bridgestone Dueler's are notorious for quickly going out of balance. The Hankook's are not all that much better from what I have seen.

 

[HarveyMushman]

Get the tires re-balanced. Not sure what the XL has but the stock Bridgestone Dueler's are notorious for quickly going out of balance. The Hankook's are not all that much better from what I have seen.

It doesn’t vibrate going downhill. Only when the engine is under load.

 

[CB750F]

If I remember well... lol, most issues were slow speed, so I think , to the dealer u go.
Good luck & let us know. ?

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