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Old 09-26-2013, 04:56 PM   #1
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Wanna ride in my truck?

....and help me diagnose how bad my vibrations are?

Just installed a drop bracket lift on a 2013, and am having slight vibrations in between 1-2 gear and very slight vibes around 25mph. Was wondering if anybody near Dublin / Livermore who is familiar with this issue wants to maybe give me some insight as to if I should be worried or not.

After reading other posts on the subject, I'm pretty confident that my vibrations are not as bad as others'...however I have nothing to compare it to, so I would like a second pair of eyes (or ears or whatever). It would be cool to meet other enthusiasts as well.

The vibrations themselves dont really bother me, but if they are bad enough to damage my 35k truck, then I have a problem.

If there are any volunteers, I would appreciate the help!
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Old 09-30-2013, 10:15 AM   #2
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Can't help you since you're too far away but I'm betting its your drive shaft. Try shimming the carrier bearing to relieve the angle. My .02c
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Old 09-30-2013, 10:18 AM   #3
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I'm sure if you come around to some TW get together you'll get someone to take you up on your offer. If you'd come to the South Bay meeting at Santa Teresa Park, I or pretty much anyone else there I'm sure, would have been happy to take a 15 minute drive with you.
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Old 09-30-2013, 03:33 PM   #4
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Quote:
Originally Posted by brian View Post
Can't help you since you're too far away but I'm betting its your drive shaft. Try shimming the carrier bearing to relieve the angle. My .02c
Relieve the angle? Maybe you can elaborate a little more on this, but the lift is a drop bracket kit so I was under the impression that all my angles would be totally stock (one of the reasons I went with a DB).

I have heard of that solution, but only for those who actually changed their angles. I appreciate the input!
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Old 10-02-2013, 12:38 PM   #5
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Quote:
Originally Posted by guitarplayer360 View Post
Relieve the angle? Maybe you can elaborate a little more on this, but the lift is a drop bracket kit so I was under the impression that all my angles would be totally stock (one of the reasons I went with a DB).

I have heard of that solution, but only for those who actually changed their angles. I appreciate the input!
I'm not talking your front end, I'm talking your driveshaft to the rear axle. The rear driveshaft is a two piece in your truck, there is an intermediate u-joint just behind the carrier bearing about where your cab meets your bed. When you lift the rear end, you increase the angle on that U-joint, increasing the likeliness of vibrations. Shims are cheap, you could even make a couple out of some flat stock. I would give it a shot.
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Old 10-02-2013, 03:03 PM   #6
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Quote:
Originally Posted by brian View Post
I'm not talking your front end, I'm talking your driveshaft to the rear axle. The rear driveshaft is a two piece in your truck, there is an intermediate u-joint just behind the carrier bearing about where your cab meets your bed. When you lift the rear end, you increase the angle on that U-joint, increasing the likeliness of vibrations. Shims are cheap, you could even make a couple out of some flat stock. I would give it a shot.


ah. This makes me feel like an idiot. Thanks for the explanation. I'll admit I havent really done my research on the vibrations as much as I should have.

Any recommendations on where to order shims / what size shims for this?

Also, I didn't take a look at all of the parts before the lift was installed. Looks like spacers were added above the carrier bearing...

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Old 10-03-2013, 01:21 PM   #7
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Wow those are some crazy spacers, wonder if thats standard on a 6" lift? I'm not positive. Generally though, most vibes as your describing are the driveshaft. Grab the drive shaft and twist it back and forth, see if you're getting any play in the u-joints (rear axle slight clunk sound is normal). Also check and make sure those bolts are tight at the carrier bearing. I really don't like the fact that they used round stock to make up to two flat surfaces like that. Maybe look into different spacers. Grease your U-joints while you're at it, assuming you have the greasable ones.

These are all just ideas, I can't give anything definitive without looking at it in person. Just to clarify, are you feeling the vibrations in your steering wheel or kinda 'all around' like a rumble sound, this will help diagnose where its coming from.
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Old 10-03-2013, 01:33 PM   #8
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Old 10-03-2013, 01:45 PM   #9
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I had the same vibes. Dropping my carrier bearing 1.5"s completely got rid of them!
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Old 10-03-2013, 06:42 PM   #10
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Quote:
Originally Posted by guitarplayer360 View Post
ah. This makes me feel like an idiot. Thanks for the explanation. I'll admit I havent really done my research on the vibrations as much as I should have.

Any recommendations on where to order shims / what size shims for this?

Also, I didn't take a look at all of the parts before the lift was installed. Looks like spacers were added above the carrier bearing...

The spacers look about the same size as the ones I have.....but mine is a 6" DB kit. And I've had the same vibes at 25mph sense day 1.
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Old 10-03-2013, 06:46 PM   #11
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Wow that look super shady imo. Go check Beefed Taco/ streetacos.com This guy makes "real" carrier bearing drop brackets. I personally would ditch that asap if you can..
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Old 10-03-2013, 07:46 PM   #12
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Quote:
Originally Posted by brian View Post
Wow those are some crazy spacers, wonder if thats standard on a 6" lift?

It's a 4" kit from RCD

These are all just ideas, I can't give anything definitive without looking at it in person. Just to clarify, are you feeling the vibrations in your steering wheel or kinda 'all around' like a rumble sound, this will help diagnose where its coming from.

It's definitely an all around rumble. Kind of like the rumble you get if you are crossing over the center line on some roads.
So you guys think those spacers look weird? I'm thinking that since this is all about the angle, I need to just try different size spacers and go based off of trial and error. Or shims.
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Old 10-05-2013, 03:37 AM   #13
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Just get something different to shim that carrier bearing, that's where I'd start, see if you could get ahold of some flat stock and drill to fit
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