Bad shaking while not in boost, like on a gravel road ---

[alwayscode390]

Hey Guys , I just got my truck back on the road after sitting for a year and a half. It used to clunk hard, and shake once in awhile.

Now its shaking nonstop , until I get into boost then it smooths out until the boost stays constant. Imagine being on a medium rock sized gravel road going 25 ... when everything vibrates ... or like a washing machine on spin cycle multiplied by 5!!!

Is this a sign of a bent propshaft? I would guess this because it happens in drive OR neutral, and I figure it smooths out during hard accelleration because it probably balances itself a little? Its also the heaviest thing that spins and could cause this vibration. It also seems SLIGHTLY stronger and noisier on the drivers side, but shakes the entire truck.

I used to think it was a transfer case problem, but that was mainly because of the clunking. I think the clunking was caused by a slapping serpentine belt ( I just got it changed and havent heard it since ... about 20 miles though, lol ).

I dont want to take the truck to a mechanic with no direction for him to search for a problem. I have a gilbert, so replacing the prop wouldnt be a big deal ... I just dont want to pay to change the prop, then have to pay again when its the transfer case. Even vice versa, I would hate to get the transfer case taken out and inspected if its fine.

I live in an apt. complex and cant do ANYTHING without management threatening me.

THANKS for any and all opinions ---

 

[alwayscode390]

Re: Bad shaking while not in boost, like on a gravel road ---

I noticed it started to happen after a 180 mile trip ( 3 hours of straight driving ) on the highway at about 65mph.

I expected the propshaft to get bent from a launch, not highway driving?

I have Falken tires, and 18" z06 wheels with about 4k miles on them ---

 

[Quickstop [UK]]

Re: Bad shaking while not in boost, like on a gravel road ---

does it idle ok? could you have lost a cylinder?

 

[2500avalanche]

Re: Bad shaking while not in boost, like on a gravel road ---

Are you running spacers? I was experienceing the same thing, it was my spacers for my rear wheels.
Check your lug nuts!

 

[alwayscode390]

Re: Bad shaking while not in boost, like on a gravel road ---

does it idle ok? could you have lost a cylinder?

It idles solid .... I will pay better attention next time to the idle though.

I just realized that when it idles its smooth too .... REAL smooth, almost like I have to double check and see if it stalled, lol ---

 

[alwayscode390]

Re: Bad shaking while not in boost, like on a gravel road ---

Are you running spacers? I was experienceing the same thing, it was my spacers for my rear wheels.
Check your lug nuts!

I DO have rear spacers , hmmm ... time to go and wrench the lugs.... but the shaking is stronger in the front. The last guys to touch the lugs were the tire boys when balancing the tires .... did I mention they had the front tires facing the wrong way ( directional tread ) .... you may be on to something.

I LOVE how you guys are thinking out of the box ... keep it up!!! ---

 

[alwayscode390]

Re: Bad shaking while not in boost, like on a gravel road ---

What are the consequences of driving it like this? Could I damage the transmission?

Also, if I replace the front wheel bearings, the transfer case, and the front and rear driveshafts .... should I have my bases covered? I dont want to keep putting this in the shop to save a buck. I just want it overwith. ( I already have wheel bearings, front gilbert, rear carbon fiber, ... the only $$$ shed would be for a Transfer case and labor )

Who sells transfer cases? Should I go to a transmission shop for the work over the typical mechanic ( dealership? ) . I heard a new straight transfer case swap is cheaper than a rebuild on a transfer case anyway? Is that true?!

Thanks guys ---

 

[warmpancakes]

Re: Bad shaking while not in boost, like on a gravel road ---

sitting for a year and a half have the tires checked to see if they are now out of round

 

[alwayscode390]

Re: Bad shaking while not in boost, like on a gravel road ---

Great idea, I have lifetime rotations on these tires.

Honestly I was having problems before the truck was wrecked.

I should take it one step at a time, simple stuff first ---

 

[Quickstop [UK]]

Re: Bad shaking while not in boost, like on a gravel road ---

saw you were looking at getting a new transfer case? Are you sure it is the TC?

 

[alwayscode390]

Re: Bad shaking while not in boost, like on a gravel road ---

I am not positive its the transfer case, but I dont have the time to take it into the shop over and over until I find whats wrong ( I dont have friends to take me to and from the shop either).

I figure if I just replace everything it COULD be in one stop , it will be done and I wont have to worry about it, lol. I know that sounds sorta crazy, but I am fed up with having my truck undrivable.

I also dont want to pay to have the propshaft and driveshaft replaced with beefier parts...then STILL have the shake , and have to get them reinstalled when the Transfer case has to come out.

The first thing I will do is get my tires rebalanced, and if its not that ... I will start with the driveline stuff ---