I have an 06' 6.0 Superduty. When I take off from a stop and turn or take off pulling a load I get a vibration that feels like it is in the rear end. It stops as soon as I get moving at about 3 mph. It is usually not to bad but when I was pulling the trailer with a load it was pretty ruff. It doesn't do it when taking off from a stop and going straight.
Can anyone help me with this?

Thanks,
Chris

 

Sounds like clutch chatter in a posi rear. If you do have a posi, adding friction modifier will likely fix it.

 

Change the read end fluid and use to bottles of friction modifier, ford part #XL-3. If that doesn't cure it, you will need the cluthes replaced.

 

Yep change the rear fluid and add 2 bottles of modifier. Or others like myself have used Mobil 1 and Royal Purple with great luck. No extra modifier needed. Or worst case the clutches will have to be replaced.

 

There is a TSB on this:

https://www.ford-trucks.com/tsb/full...hp?tsb=05-17-6

TSB
05-17-6 DRIVE-AWAY SHUDDER OR VIBRATION

Publication Date: August 16, 2005

FORD: 1999-2006 F-Super Duty



This article supersedes TSB 04-22-7 to update the vehicle model years.

ISSUE:
Some 1999-2006 F-Super Duty vehicles may exhibit excessive drive-away shudder or vibration, under moderate to heavy acceleration from a stop. This may be due to driveline angle.

ACTION:
Shim the center carrier bracket downward to correct the condition. Refer to the following Service Procedure.

SERVICE PROCEDURE

When shimming the center carrier bracket, a maximum of three (3) 1/4" shims may be used (EOTZ-4A209-A). When refastening the carrier bracket use bolt (56564-S2). A 7/16 x 14 grade 5 bolt may be substituted providing that it extends at least three (3) threads past the nut. Use Motorcraft Threadlock 262 (TA-26), and torque bolts to 46 lb-ft (62 N-m).

NOTE: IF THE VEHICLE IS NORMALLY LOADED, ROAD TESTS WILL NEED TO BE PERFORMED WITH THE VEHICLE LOADED.



Before beginning the repair, road test the vehicle to gain a feel for the harshness of the shudder/vibration.
Install one (1) shim, (DO NOT use Threadlock on the bolts at this point), re-road test vehicle.
If condition is corrected, apply Threadlock and torque bolts as directed above.
If condition is not corrected, re-perform Step 2 (to a maximum of three (3) shims) and reevaluate vehicle.
NOTE: IF THE CONDITION IS STILL NOT CORRECTED AFTER INSTALLING A MAXIMUM OF THREE (3) SHIMS, REFER TO WORKSHOP MANUAL SECTION 205-00 FOR FURTHER DIAGNOSTICS.




PART NUMBER PART NAME
EOTZ-4A209-A Shim
56564-S2 Bolt
TA-26 Threadlock 262 Motorcraft


WARRANTY STATUS:
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage

OPERATION DESCRIPTION TIME
051706A 1999-2006 F-Super Duty: Road Test To Verify Concern, Install One Shim, And Road Test To Verify Repair (Includes Time To Raise Vehicle And Install Threadlock) 1.2 Hrs.
051706B 1999-2006 F-Super Duty: Road Test To Verify Concern, Install One Shim, And Road Test To Verify Repair Condition Still Exists, Install A Second Shim And Road Test (Includes Time To Raise Vehicle And Install Threadlock) 1.7 Hrs.
051706C 1999-2006 F-Super Duty: Road Test To Verify Concern, Install One Shim, And Road Test To Verify Repair, Install A Second Shim And Road Test Condition Still Exists, Install A Third Shim And Road Test (Includes Time To Raise Vehicle And Install Threadlock) 2.2 Hrs.

DEALER CODING
BASIC PART NO. CONDITION CODE
4A209 42

 

Thanks guys thats a big help. I'll try changing the fluid. Now I still have the balance of the power train warranty. Will this be covered under this warranty?

Thanks,
Chris

 

Yes, call your dealership and advise them you would like your vehicle fixed per TSB 05-17-6.

 

Thats great. Thank you very much for your help.


Chris