Shudder on take off - Ford Powerstroke Diesel Forum
 
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post #1 of 8 Old 08-20-2012, 04:13 PM Thread Starter
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Shudder on take off

ok so i did some searching and none of the post i found had any solutions posted. well for a while now i have had a bad vibration/shudder on take off. well i thought it was coming from bad axle wrap. well i got traction bars installed finally after breaking a set of springs. well the vibration is still there and if anything it has gotten worse. u-joints all seem to be good. i have not checked carrier bearing yet. i kinda think it is coming from the lsd but at the same time i don't think so cause it will do it taking off in a straight line. what are some things i can check please. i can't afford to throw parts at so i want to do what i can to try and pin point the cause.

03 F350 6.0 SRW 4X4 lariat

481hp 832tq

8" super lift 385/70r16 Toyo MT's
FatBoy traction bars
Durastroke stg1
intake
MBRP 5" straight pipe
Custom tuned by Vivian "Looney Wild Track"
Edge Insight CTS
Zoodad mod
high idle mod
6.4 banjo bolts
Updated fuel pressure regulator (Blue spring mod)
EGR cooler delete
6K 55w HID's
6k 35w fog HID's
B&W turnover ball


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post #2 of 8 Old 08-20-2012, 04:15 PM
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I'm gonna say it's your carrier bearing

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Early 99 F250 with a bunch of extra junk...
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post #3 of 8 Old 08-20-2012, 04:24 PM
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Me too. Carrier barrier needs to be shimmed. Do a little research and get the angles right. Bet it will be gone.

2001 F250 Lariat Crewcab, Automatic, 4X4

(Late '99 Regular Cab Work Truck)


6.5" Pro Comp Lift ~ Traction Bars ~ Son-Built Sliders ~ 16" Pro Comp Xtreme Wheels with 35" BFG TA KM2s
4" Banks Exh.-Power Elbow ~ Wicked Wheel ~ DIY AMSOIL EaAU4090 Intake ~ PHP 6 Pos Chip ~ LowDown LED Upgrade
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post #4 of 8 Old 08-20-2012, 05:17 PM Thread Starter
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the bearing does have a drop bracket. i haven't ever had to deal with drive line angles. what are my chances that some one around here lives close by that can maybe check it out.

03 F350 6.0 SRW 4X4 lariat

481hp 832tq

8" super lift 385/70r16 Toyo MT's
FatBoy traction bars
Durastroke stg1
intake
MBRP 5" straight pipe
Custom tuned by Vivian "Looney Wild Track"
Edge Insight CTS
Zoodad mod
high idle mod
6.4 banjo bolts
Updated fuel pressure regulator (Blue spring mod)
EGR cooler delete
6K 55w HID's
6k 35w fog HID's
B&W turnover ball


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post #5 of 8 Old 08-23-2012, 04:59 PM Thread Starter
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i checked out the carrier bearing and doesn't seem to be bad. i'm thinking about asking a buddy of mine with a go-pro camera and maybe rig it up at the driveine and see if i see anything moving that shouldn't.

03 F350 6.0 SRW 4X4 lariat

481hp 832tq

8" super lift 385/70r16 Toyo MT's
FatBoy traction bars
Durastroke stg1
intake
MBRP 5" straight pipe
Custom tuned by Vivian "Looney Wild Track"
Edge Insight CTS
Zoodad mod
high idle mod
6.4 banjo bolts
Updated fuel pressure regulator (Blue spring mod)
EGR cooler delete
6K 55w HID's
6k 35w fog HID's
B&W turnover ball


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post #6 of 8 Old 08-25-2012, 09:17 AM
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I would suggest pulling the rear cover off your diff and have a look inside, could be worn clutches or something. does it get worse when turning around a corner or with a heavy tow?
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post #7 of 8 Old 08-25-2012, 03:36 PM Thread Starter
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Yea its worse when turning or loaded

03 F350 6.0 SRW 4X4 lariat

481hp 832tq

8" super lift 385/70r16 Toyo MT's
FatBoy traction bars
Durastroke stg1
intake
MBRP 5" straight pipe
Custom tuned by Vivian "Looney Wild Track"
Edge Insight CTS
Zoodad mod
high idle mod
6.4 banjo bolts
Updated fuel pressure regulator (Blue spring mod)
EGR cooler delete
6K 55w HID's
6k 35w fog HID's
B&W turnover ball


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post #8 of 8 Old 08-26-2012, 08:37 PM
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to me i would think tour limited slip clutches are going or gone in your rear diff, if they were completely gone it would shudder really bad even at high way speeds.
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