shakes part 2

[beerhiker]

Hello, I replaced rotors and had 4 wheel balance, my front is smooth as can be now (thanks from previous tread). Im having some shakes from the rearend that are speed specific, starts at 55mph and ends around 70mph, I can see the bed shaking when it happens. So what are your guesses to what this is?
1. rear tires did not get balanced properly
2. something bad with tire
3. shock or spring issue
4. ????

thanks

 

[DenCo40]

Have you installed a lift? If so some people forget to install spacers on the carrier bearing. It happened to me when I did my lift....

 

[beerhiker]

sorry should have stated: 04 Tacoma DC, stock.

 

[DenCo40]

U-joints?

 

[juicebox]

I had a vibration in my stock '91 yota and couldn't figure it out, it would start right at 35mph and go away at 45. It ended up being a u-joint. Just check the driveshaft for play, turn it side to side and you will be able to see if one of them is loose.

LOL at "Nut behind the wheel is loose".

 

[beerhiker]

yes the nut behind the wheel is way loose :clapsmile

 

[mtnbike28]

How much lift?

Sorry to hijake but how much lift? I am researching my lift and have not seen this mentioned yet. I was planning just a OME 2 inch. But I need it to work from day one, I drive 25k a year in the truck!

Have you installed a lift? If so some people forget to install spacers on the carrier bearing. It happened to me when I did my lift....

 

[DenCo40]

Sorry to hijake but how much lift? I am researching my lift and have not seen this mentioned yet. I was planning just a OME 2 inch. But I need it to work from day one, I drive 25k a year in the truck!

PM sent...

 

[Jacket]

I'd second drive shaft or u-joint.

 

[beerhiker]

ok, u-joints all tight, no movement. Cant be a bent driveshaft, nothing has ever touched it. Spring bushing appear to be good, not even cracks. I know steel wheels have their probs with getting bent but alloys? Its been mostly just on gravel roads and easy trails, not abused.
Think will have rear wheels double checked for balance and have tires checked. I suppose I could move the backs to the front and see what that does, would tell me if it were wheels/tires for sure....fun fun

 

[beerhiker]

Ok, moved rear tires to front and still shakes. Starts at 55mph smooths out around 70.

Its not tires/wheels I have to assume now.
Driveshaft weights still there, shaft does not have a mark on it.
Spring and shock bushings look good
Shocks not leaking, appear to be good.
Cant see anything bent or damaged.
All nuts/bolts tight.

Any other ideas?

 

[njtaco]

Is it a two piece driveshaft? If so, try replacing the carrier bearing...