Big Load - and first problem
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Posting Guru
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A dealer can fix the problem by lowering the drive shaft possibly or adjusting the pinion angle. Fixing the problem with a load may create a problem unloaded. In my opinion a small amount of axle wrap is acceptable. Was your load actually 1 ton or more? I rarely hear customers complain about axle wrap with F150s. On 250s and 350s it is a common complaint for owners with truck campers and 5th wheel trailers on 2008 and newer trucks. The older trucks like mine had shorter springs.
I hauled another load today - and took a few pictures. The shudder was there, same as yesterday, but I can actually avoid it by taking it very easy from zero to 5mph, so it's not all that much of a big deal.
Here is the other thread I just posted.
Laughing Gas
Joined: Oct 2005
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From: South Jersey
Thanks, Juneau & efx4!
I don't think it's rubbing - it did sag a bit, but looked about level. With the tires rubbing, I'd also not expect it on take-off only, the shudder was gone at > 5 mph or so.
efx, the drive shaft would make sense. I can live with it - if it does not get worse and/or start doing it unloaded. How many miles do you have on your truck, and has the shudder changed over time?
I don't think it's rubbing - it did sag a bit, but looked about level. With the tires rubbing, I'd also not expect it on take-off only, the shudder was gone at > 5 mph or so.
efx, the drive shaft would make sense. I can live with it - if it does not get worse and/or start doing it unloaded. How many miles do you have on your truck, and has the shudder changed over time?
More Turbo
Joined: Dec 2011
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Yeah, I read through the other thread, and I am sure it's axle wrap. Some Toyotas experience the same thing, I had that with my Tacoma sometimes.
Comparing to what people describe in that other thread, what I have is very minor. Unloaded there is no problem at all. Considering that, I'll probably do nothing for now, and will be watching it, especially my first tow. I think the stiffer HD payload springs keep this from happening when empty, and my load was really heavy while the shudder wasn't all that bad considering what others have seen. No problem in second (or any other) gear either.
Only one thing seems to be for sure: talking to the dealer about this appears to be a waste of time.
Comparing to what people describe in that other thread, what I have is very minor. Unloaded there is no problem at all. Considering that, I'll probably do nothing for now, and will be watching it, especially my first tow. I think the stiffer HD payload springs keep this from happening when empty, and my load was really heavy while the shudder wasn't all that bad considering what others have seen. No problem in second (or any other) gear either.
Only one thing seems to be for sure: talking to the dealer about this appears to be a waste of time.
Senior User
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So based on this quote in the other thread I would think a little axle wrap/shudder is acceptable.
That is a pretty stout load for a F150. 
Okay, here it is.
Total with the wood, full tank & me was 8,340 lbs. So I was 140 lbs over my GVWR. This was a good exercise, as now I have an idea about how much I can take on. I had 3.5" of sag.
Me, truck, full tank: 6,220 lbs.
So the wood was 2,120 lbs. You guys were really close. Thanks for playing.
I have checked - I did not hit the bump stops, probably wasn't even close. No marks, the axle is just dirty from the rain of the last few weeks.
Total with the wood, full tank & me was 8,340 lbs. So I was 140 lbs over my GVWR. This was a good exercise, as now I have an idea about how much I can take on. I had 3.5" of sag.
Me, truck, full tank: 6,220 lbs.
So the wood was 2,120 lbs. You guys were really close. Thanks for playing.
I have checked - I did not hit the bump stops, probably wasn't even close. No marks, the axle is just dirty from the rain of the last few weeks.
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I can avoid the shutter even with that load, so I just call it good. Thanks for all the feedback!
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Not needed, the truck was about level with the load, and it hauled it great.
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