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anyone have problems with 3 inch blocks, vibration at low speeds????

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Old 02-26-2014, 11:21 AM   #21
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Do u have 3inch blocks white out. I just ordered same shims. Was there enough thread on your u bolts or did u need new ones.
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Old 02-27-2014, 07:48 AM   #22
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No, mine are 2.5" Raptor blocks and OEM U-Bolts. The shims aren't thick at all, so if you have any thread remaining with the U-Bolts you're running now you shouldn't have a problem.
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Old 02-27-2014, 10:26 AM   #23
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I thought the raptor blocks already were tapered..... interesting. Strange they wouldnt vibrate on a raptor but do on our trucks.
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Old 02-27-2014, 01:12 PM   #24
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Nope, Raptor blocks are completely rectangular in shape. The pads on the axle may be welded differently though since they use a different axle than regular F-150's. Not saying that's what it is, but would make sense that the correction is done on the spring perch versus using an angle block.
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Old 03-04-2014, 05:01 AM   #25
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Sorry to sound dumb but how is the shim oriented? I might have some time to put them on but don't want to make the problem worse.
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Old 03-05-2014, 07:32 AM   #26
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Thick part of the shim goes toward the rear of the truck.
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Old 03-06-2014, 08:24 PM   #27
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Everything still good with those shims whiteout? Still no vibration? Mine should b here in a week or so
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Old 03-07-2014, 08:00 PM   #28
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Quote:
Originally Posted by White-Out View Post
Thick part of the shim goes toward the rear of the truck.
Thanks a bunch!
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Old 01-02-2015, 07:57 PM   #29
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I installed the pro comp 3 inch blocks and ended up with the driveline shutter/vibration between 20 to 40 km/hr (12-24 mph). The instructions were not very clear as I could not locate the arrows that were referenced and I ended up putting them in the wrong way. I didn't notice the first time that the blocks are tapered. Changed them around and vibration is gone. Im pretty stoked I don't have to take it in to suspension shop.
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Old 01-02-2015, 07:57 PM
 
 
 
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