Ding!
MILD SHUTTER when towing ..
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Senior User
Joined: Sep 2005
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From: Southeastern CT
MILD SHUTTER when towing ..
Hey all!
As some of you know I have a 2004, F-350 CC DRW Lariat 4x4 with the FX4 off road package with 31K miles. Truck pulls 85% of the time when I use it. It has 4.10 gears with limited slip diff. I notice when I pull a heavy load, in excess of 10K pounds, I get a shutter on take off but goes away well before 20MPH. I do believe this is normal cause partly due to the long drive shaft and also partly due to how the 6.0 is designed. Trans runs cool.. Pulling between 170 to 180 degerees unless its REALLY hot out then it might go to 190, but not for long.. When truck is empty of pulling a light load, then no shutter. Am I correct that this is normal? I asked the dealer a while ago and they said its normal. I had a 2001 F-350 SRW Lariat with 3.73 gears and a 7.3 PSD and it did shutte some as well with a heavy trailer. The shutter is more annoying than anything.
As some of you know I have a 2004, F-350 CC DRW Lariat 4x4 with the FX4 off road package with 31K miles. Truck pulls 85% of the time when I use it. It has 4.10 gears with limited slip diff. I notice when I pull a heavy load, in excess of 10K pounds, I get a shutter on take off but goes away well before 20MPH. I do believe this is normal cause partly due to the long drive shaft and also partly due to how the 6.0 is designed. Trans runs cool.. Pulling between 170 to 180 degerees unless its REALLY hot out then it might go to 190, but not for long.. When truck is empty of pulling a light load, then no shutter. Am I correct that this is normal? I asked the dealer a while ago and they said its normal. I had a 2001 F-350 SRW Lariat with 3.73 gears and a 7.3 PSD and it did shutte some as well with a heavy trailer. The shutter is more annoying than anything.
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Joined: Sep 2000
Posts: 23,174
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From: Stephensville WI
I don't think it is normal. What I think is happening is the LS rear end is causing the shudder.
I would change the fluid in your rear differential either with fresh fluid and the friction modifier or with a good quality synthetic fluid that doesn't require the friction modifier, see if that doesn't eliminate the shudders.
I would change the fluid in your rear differential either with fresh fluid and the friction modifier or with a good quality synthetic fluid that doesn't require the friction modifier, see if that doesn't eliminate the shudders.
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Joined: Dec 2003
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From: Arizona
Originally Posted by electrified_cc
Hey all!
As some of you know I have a 2004, F-350 CC DRW Lariat 4x4 with the FX4 off road package with 31K miles. Truck pulls 85% of the time when I use it. It has 4.10 gears with limited slip diff. I notice when I pull a heavy load, in excess of 10K pounds, I get a shutter on take off but goes away well before 20MPH. I do believe this is normal cause partly due to the long drive shaft and also partly due to how the 6.0 is designed. Trans runs cool.. Pulling between 170 to 180 degerees unless its REALLY hot out then it might go to 190, but not for long.. When truck is empty of pulling a light load, then no shutter. Am I correct that this is normal? I asked the dealer a while ago and they said its normal. I had a 2001 F-350 SRW Lariat with 3.73 gears and a 7.3 PSD and it did shutte some as well with a heavy trailer. The shutter is more annoying than anything.
As some of you know I have a 2004, F-350 CC DRW Lariat 4x4 with the FX4 off road package with 31K miles. Truck pulls 85% of the time when I use it. It has 4.10 gears with limited slip diff. I notice when I pull a heavy load, in excess of 10K pounds, I get a shutter on take off but goes away well before 20MPH. I do believe this is normal cause partly due to the long drive shaft and also partly due to how the 6.0 is designed. Trans runs cool.. Pulling between 170 to 180 degerees unless its REALLY hot out then it might go to 190, but not for long.. When truck is empty of pulling a light load, then no shutter. Am I correct that this is normal? I asked the dealer a while ago and they said its normal. I had a 2001 F-350 SRW Lariat with 3.73 gears and a 7.3 PSD and it did shutte some as well with a heavy trailer. The shutter is more annoying than anything.
Here is the newest TSB and supersedes the one "ozx3+1" posted.
http://www.ford-trucks.com/tsb/fullt...hp?tsb=06-23-4
Hope this helps
Last edited by blackhat620; Jul 3, 2007 at 03:11 PM.
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Senior User
Joined: Sep 2005
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From: Southeastern CT
Thank you Blackhat.. Kinda figured a possible driver shaft angle since the drive shaft is so long. I will try shimming since I have my own lift... Easier than bringing it to the dealer!!!!...
Posting Guru
Joined: Mar 2006
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From: SoCal, SD CO. East
Originally Posted by blackhat620
Here is the newest TSB and supersedes the one "ozx3+1" posted.
www.ford-trucks.com/tsb/fulltext/show_article.php?tsb=06-23-4
Hope this helps
www.ford-trucks.com/tsb/fulltext/show_article.php?tsb=06-23-4
Hope this helps
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Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 10
From: Arizona
Originally Posted by ozx3+1
Thanks for the up-to-date info! I'll give it a read too = )
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I had the same problem when I tow my 19,000 lb fiver with 4,000 lbs pin weight in the bed. I put a set of Firestone Ride-Rite airbags on it to raise the back end and the shudder went away completely. The load of the pin weight is squashing the back end down to the point that the drive-line angle is changed so that it is out of specs.
Postmaster
Joined: Jan 2005
Posts: 4,743
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From: Peoria, IL
I am thinking this is a carrier bearing shim problem as well. However, I don't think he should mess with removing any shims. If he does he will most likely end up with the same shutter when taking off unloaded. His best bet is probably airbags like glsurratt suggested. This will bring the driveline back closer to the correct angle when loaded, and won't affect the unloaded driveline angle. Also, if he is towing 85% of the time like he mentioned he will probably appreciate the way the truck handles with the bags added.
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