4" rear block now have vibration - Ford Powerstroke Diesel Forum
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Old 03-09-2014, 06:48 PM
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4" rear block now have vibration

I installed ready lift 4" rear blocks on my 2002 crew cab short bed 4x4 and now my driveshaft vibrates. I tried to shim my carrier bearing. Started with 1/4" shim and kept adding and it never went away. I added up to 1 1/4" of shims and still have this problem. I'm just looking for some advice any help would be great and thank you.
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Old 03-09-2014, 06:55 PM
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The 4" blocks also have a taper to them.
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Old 03-10-2014, 03:18 AM
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What does your pinion angle look like?

Last edited by schlutzer; 03-10-2014 at 04:02 AM.
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Old 03-10-2014, 03:53 AM
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pinion angle. You probably need to shim it.
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Old 03-10-2014, 04:18 AM
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Quote:
Originally Posted by Shadowfax View Post
pinion angle. You probably need to shim it.
Did you bother reading the post?


To the OP, how much total lift do you have? Was it stock before the 4" block? Jack up the rear and spin the rear drive shaft by hand. Check for loose straps, worn u joints, pinion seal, pinion tabs that hold the u joint, and your carrier bearing

Also, when does the truck vibrate?
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Old 03-10-2014, 04:22 AM
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Quote:
Originally Posted by bigred3297 View Post
Did you bother reading the post?


Also, when does the truck vibrate?
The OP shimmed his carrier bearing, not his leaf springs as shadowfax and myself are both asking about.
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Old 03-10-2014, 04:27 AM
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Quote:
Originally Posted by schlutzer View Post
The OP shimmed his carrier bearing, not his leaf springs as shadowfax and myself are both asking about.
Shim his leaf springs? Who does that.....

He has a tapered block if that's what you're referring to.
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Old 03-10-2014, 04:28 AM
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Quote:
Originally Posted by bigred3297 View Post
Shim his leaf springs? Who does that.....

He has a tapered block if that's what you're referring to.
Doesn't mean the taper is right, shimming the leaf springs is done every single day... easiest way to set pinion angle unless you want to cut off your perches and move them like I have.

Tapered lift blocks do the EXACT same thing, and you can also buy them in different degrees, just like pinion angle shims
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Old 03-10-2014, 04:33 AM
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I asked him what it was, and Shadowfax suggested it as a possibility.

Especially since the OP seems to have only focused on the carrier bearing it is pretty logical to me to query about the other side of the equation.

Last edited by schlutzer; 03-10-2014 at 04:38 AM.
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Old 03-10-2014, 05:27 AM
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Problem is, it's tapered! Need a flat 4" block on a ccsb!
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