Vehicle shakes on freeway

[2drXmobb]

I have a 94 blazer it runs fine on the streets, but when I drive it on the freeway over 60-65 it shakes really bad, brand new tires and rims, not sure if it's the u joints or drive shaft. I did replace the end links on the front sway bars they were missing bushings on both ends . I just bought the truck and I'm trying to find all the kinks that the previous owner didn't address

 

[Schurkey]

As said--U-joints, bent/dented/out-of-balance driveshaft, out-of-balance wheels/tires, out-of-balance brake drums/rotors, bent axle shaft in back, bent CV shaft in front...the list goes on.

 

[movietvet]

Shakes where? The whole vehicle? In the seat of the pants? Steering wheel? Floorboard? Were the tires and wheels replaced to attempt to fix the shakes?

 

[Drunkcanuk]

One thing you can do is take the front driveshaft off and see if that eliminates the shake. If it does, then you can concentrate on the front half.
Does the shake change with RPM's? Like if you downshift or toss it into neutral?

 

[Caman96]

I just bought the truck

Might need an alignment.

 

[movietvet]

Might need an alignment.

You can get a caster shake/shimmy or shakes from tire wear.

 

[evilunclegrimace]

One thing you can do is take the front driveshaft off and see if that eliminates the shake. If it does, then you can concentrate on the front half.
Does the shake change with RPM's? Like if you downshift or toss it into neutral?

The front drive shaft does not turn unless the 4WD is engaged

 

[2drXmobb]

Shakes where? The whole vehicle? In the seat of the pants? Steering wheel? Floorboard? Were the tires and wheels replaced to attempt to fix the shakes?

Feels like the dash and front end shakes it's unusual and hard to articulate

 

[2drXmobb]

One thing you can do is take the front driveshaft off and see if that eliminates the shake. If it does, then you can concentrate on the front half.
Does the shake change with RPM's? Like if you downshift or toss it into neutral?

No it shakes when I'm around 60-65 mph but sometimes it feels like hesitation when I put it on a load. Hard to explain. But when I'm city driving it's normal , but I can't rule out if it's an engine problem or suspension problem 100%. I can try and record it , can we post videos?

 

[2drXmobb]

Might need an alignment.

It might , but usually when I have alignment issues it goes left or right , I've never had alignment issues where it shakes unless the tires need to be balanced