Tranny mounts or something else?

[DragonUSMC]

help me diagnose.

2000 Chevy Blazer 2 door 4x4.

while driving, when the accelerator is pushed and the car is running above 40mph the car gets a deep vibration. Not super heavy but it is constant. When the pedal is released the vibration goes away.

When the car is coasting above 40 mph and i put it in neutral and press the gas pedal the engine just revs as normal with no vibration.


I'm thinking its the tranny mounts... but i feel like I'm missing something. Driving to Iowa tomorrow so i need to figure this out today. Ask questions, shoot ideas, give me anything. thx.

[DustinsDuster]

could be a Ujoint as well- might explain why you only feel it when its under load. can you get under it and inspect the mounts and Ujoints?

[DragonUSMC]

yeah i can i was going to do that today, but U-joints, always look the same to me... good or bad.

[sparkles]

It's the U joints. Had the same problem on my 97

[SLVR7]

yeah i can i was going to do that today, but U-joints, always look the same to me... good or bad.

You'll have to pull the drive shaft to see if either one doesn't move smoothly, which is most likely your problem.

[Deimos]

I will be more specific and say its your rear u joint

[Deimos]

grab that puppy and move it up and down. It should be tight and by rear I mean the you joint right next to ur rear diff.

[Scott]

i agree, depending on how bad it is you could try rotating tires and see if anything changes. where's our tire man at jake?

[Deimos]

Dude you should know rotating won't help. Well at least if neutral helps the vibration. I hate tires but I gots to stick to what I'm good at. Although I am getting really good at 3.8 timing cover gaskets on caravans lol.

[DragonUSMC]

I inspected the tranny mount and shook the fuk out of it... its solid as can be, so I think it is the U-joint... but the vibration is only very slight, so i'll get it fixed when i get back to iowa tomorrow!

thanks for the help... Anyone have a press i can borrow? =P

[DustinsDuster]

shouldnt need one, i've changed them with a hammer and a block before.

[Deimos]

Tiz true you only need a press for ford turcks they can be a pain in the arse. When do you arrive in CR?

[sparkles]

Don't got a press, but I do got an extra U joint you can have.

[Deimos]

I don't got a u-joint, but I do got a press