Thanks for all the updates, F-250,LD. When is the new transmission mount going to be installed?

Crystal

 

My 2010 SCrew 6'5" 5.4 4x4 is doing the EXACT same thing. 80k on it, so warranty work is out of the question. Keep us updated on what finally fixes it!

 

I received word from the dealership. The new driveshaft is in and it helped. Apparently the Raptor trans mount is in and it is fixed. I haven't picked it up yet so I'm going on their word as of now. I'll get it next week and put it to the test.

I wonder what makes the Raptor mount different.

 

Mine has "quivered" since new also. I had figured it to be an ecoboost programming problem, as mine is a definite stall or miss. Interesting that this is a 5.0. Mine only does it from a stop or almost stop, and under very light gas, such as when waiting to turn left and trying to roll slightly forward. My dealer needed factory help to replace a window regulator, so theres no chance I would let them try to figure this one out. My solution: more gas.

 

Mine has done this since day 1. I've been to the dealership multiple times and they can't seem to correct it so I gave up. I won't ever buy another truck with a 2 piece driveshaft. I don't think the issue is the driveline itself. The motor mounts and trans mount are way too soft on these trucks. I wish somebody would come out with an aftermarket polyurethane mount.

 

99.99% gone with little to no load.
10% gone when pulling my 4000# trailer.

 

I'm thinking that the "fixes" are just covering up a bigger problem.
I hear that the Raptor trans mount is a different height and stiffer.

I'm still thinking that it could be...
Loose body mounts
Loose/bad motor mounts
Bad torque converter
Bad clutches (or something) in the transmission
Something not properly setup in the rear diff
MAYBE, axle wrap.

I really doubt that it's axle wrap because it was doing it (worse) when easy on the gas and less when more aggressive on the gas.

 

Did your work slip have a part number for the raptor trans mount?

I mentioned the shudder on my truck when I was in for an oil change and they think a new driveshaft will fix it, so one has been ordered.... Trying to be optimistic, but not expecting a fix out of it. Will mention the trans mount if the DS doesn't do it.

 

The truck is in for further exploration.
Since 99% of the quiver is gone with no load or even the bed loaded but it is there when towing a 400#-5000# trailer, this is going to be a challenge for the dealer. They are going to have to tow something and try a fix and tow again.
I did ask if the Raptor motor mounts are stiffer (like the trans mount is), my service adviser believes so. They might try them.

I did ask about the rear springs and possible axle wrap.

 

They have done nothing this round to eliminate my issue!

The story is "that the added weight of the trailer lowers the rear of the truck and that changes the pinion angle. This change is causing the quiver". "Even bigger trucks have a similar vibration when loaded heavy or towing".

Do we buy this?