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Old Jan 17, 2010 | 10:35 AM
  #1  
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dwhisenant
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2004 shudders

My 2004 Lariat with 110,000 miles has a shudder feeling when I back up or go foward in low. This only happens when I first take off, as far as I can tell. Would this be transmission clutches slipping or rear end clutches slipping, or something else? What test can I do to isolate the problem?
 
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Old Jan 17, 2010 | 10:51 AM
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From: Centerton, AR
My 2006 is doing the same. It has roughly 48,000 miles. I'm interested in knowing what the problem is as well.
 
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Old Jan 17, 2010 | 11:21 AM
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Do you both have limited-slip? I had the same issue and there was an Update for shuddering and the packing was replaced in the limited-slip and problem was solved
It kinda felt like your hitting the rumble strips on the highway..
 
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Old Jan 17, 2010 | 12:35 PM
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Yep, I got the trailer package which comes with limited slip. It has always felt like the rear end, but I couldn't tell. I wonder what it will cost to have it fixed, with 110K no warranty will apply?
 
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Old Jan 17, 2010 | 12:46 PM
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I looked at my receipt from the dealer and mine was under warranty and it doesnt give prices. So i wouldnt know what it cost someone on here has paid cash for this job im sure. they would know. But i will put money on it, thats your problem.
 
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Old Feb 19, 2011 | 11:05 AM
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I ended up adding 8 oz. of additive and the problem is gone for now.

Now I have inherited the TC lockup issue, so I turn off od anytime I am below 60 mph. Tried dealer flush with new fluid, didn't help at all.
 
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Old Feb 19, 2011 | 06:27 PM
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A ford Tech also said to drain the Syntheic 75w-145 and add 80w90 NON syntheic and add 3 bottles of FORD additive. He said it will take care of it and he said IF it doesn't then you need to replace clutch packings. He said ONLY do this if you are out of warranty.. Mine is starting to do this again after 70k on the rebuild...
 
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Old Feb 20, 2011 | 06:22 AM
  #8  
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From: Vicksburg, MS
If you are out of warranty you may want to consider Detroit Truetrac Locker by Eaton. The part number should be 913A477, but check with a powertrain shop that sells them to verify part # for your truck. Auburn Gear makes a locking chunk that has a different type of set up also. Part #542090 should fit your truck. Price range from around $550 for the Auburn to $680 for the Detroit. The Detroit is not like the old locker they use to make. A few on the site have used the Detroit.
 
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Old Feb 21, 2011 | 09:02 AM
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I had the same issue in my 04..

what i ended up doing was draining the rear and changing the fluid..

i went to the ford dealer and bought the additive and put the recommended Syntheic fluid and i have had no more issues..

when i would take off the who truck would shake.. drove me nuts for a few years..
 
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