When towing my fifth wheel (about 11k pounds) I get a slight shudder off the line. I can feel it just a little bit with a hard unloaded launch. To me it feels like the U-joints are binding under the torque load. I have a 172" wheelbase 4x4 with two piece shaft. Just want to know if they all do this or if I have to go camp out at the Ford store.

 

I have it on mine.Went to Ford regional rep said it is normal.There are several discussions on it here and other sites.Some have had Ford work on it with varing results.I put air bags on and it helps some but does not eliminate.Trailer is about 15K around 3k pin

 

I kinda had that feeling. On the fence over airbags right now. Memorial day weekend is my heaviest trip of the year weight wise and truck was still sitting level, headlights still working as designed. Will finish out the summer and then decide.

 

I also have a shudder when trying to take off quickly with my toyhauler.
Full loaded at close to 13,000lbs.

I haven't been to the dealer about it yet.
Sounds like it might be "normal".

_

 

There have been very few with bad torque converters but with worse symptoms than you describe. Might want to search that topic.

On the other hand, these engines and transmissions are applying record numbers of torque to the ground. Honestly, it's an awful lot of power being applied to medium duty components and tires. I think a little axle wrap and general "complaining" from the drive train would be expected. But, you could chase the torque converter issue.

 

I had a similar vibration pulling my 11000 # 5th wheel. My 8ft 4x4 sc was squatted down just a little (2 or 3 in). After reading here on FTE I assumed it to be normal. I did however want the truck level when towing so took it to the local spring shop and had one leaf added to the rear springs. That seemed to take care of the problem and it really didn't effect the ride at all.

 

I have experienced the driveline shudder from takeoff pulling a 7000 lb horse trailer with our long bed F350. I think it's common. I only notice it in first or second gear.

 

I did not have it on my CCSB before the Carli lift but I do have it now. 10k 35' fifth wheel. There should be a few threads here on it, I remember reading about it. Some got it to go away I believe. Most just live with IIRC.

Thanks

 

Thanks for input guys! Its fairly minor. If I was the only one I would probaly just monitor it for now. But now I won't worry it.