Weird pulsing vibration

[Shauncho]

When I drive my '99 4runner, I can feel this weird pulsing vibration that occurs at highway speeds. It'll fade in an out like a wave and happens every 1-2 seconds. Think it's driveshaft vibes? I feel it in the gas pedal and I can also feel the whole car shake a little. I greased my driveshaft not that long ago, thing I over-greased it?

 

[Jowenbrown]

I've had similar experiences in the past on other vehicles. I ended up needing to replace bad u-joints. If that ends up being the issue, make sure you get Spicer brand joints.

 

[Shauncho]

Yeah, the driveshaft components are all original so I could see that being the case. Thanks for the tip! Wouldn't be a bad idea to change them out anyway.