shuttering on take off? - Ford Powerstroke Diesel Forum
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Old 04-23-2010, 03:20 PM
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shuttering on take off?

i have a 4.5 DR lift with 35's on 2000 f250....

after i installed the lift i noticed some studdering when start to accelerate.. its coming from the rear somewhere? everything is torque'd to spec and aligned properly.. this only happens under moderate acceleration.. anyone know what this could be? am i experiancing "axle wrap"?
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Old 04-23-2010, 03:30 PM
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id say more likely a tranny problem than rear end. Mine has a shutter sometimes in high HP tunes.
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Old 04-23-2010, 03:37 PM
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dont think its the tranny...but on that note.. i havent installed my chip yet(havent had time LOL) so its still stock..i also have a JW valve body that i have to install.. so we will see if that helps.. thanks for your input.
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Old 04-23-2010, 03:40 PM
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Well, just thought id throw that out, i know thats what wrong with mine. but that PHP will make a world of difference man!
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Old 04-23-2010, 03:44 PM
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i think i will get a chance to install my vb,chip and do an oil change tomorrow morning.... if the RAIN holds off! gotta love BC.
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Old 04-23-2010, 04:09 PM
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any other thoughts on what this could be?

it sounds like the noise i get when im turning a corner and it shutters... but i know that is because of my rear solid axle... it sounds similar to this but on a straight away.
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Old 04-23-2010, 04:20 PM
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did you put a shim in your steady bearing? did you check you u joints?
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Old 04-23-2010, 04:29 PM
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my front end is perfect, ujoints are tight, all drag link and tie rods are brand new with moog...but im not sure about shim your referring to?

sorry for the lack of knowledge on the terminology... im a Carpenter by trade...driveway mechanic by hobby.
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Old 04-23-2010, 04:34 PM
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He's refering to your carrier bearing (if you have a 2 piece driveshaft). I just installed a 6" lift and I've got the same shudder you're talking about. You need to make sure your carrier bearing is shimmed properly and maybe look into getting some traction bars
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Old 04-23-2010, 04:36 PM
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for traction bars.. could i take the bracket mounts for a shock and weld them to my axle then and fab up my own bars?

im not sure what the carrier bearing is or where its located.. ill have to look it up in the haynes.
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