I have a really bad noise coming from the rear of engine under dash. sounds like cavitating or cratered bearing. it only occurs when pulling fifth wheel, 55 ish MPH 3000 ish RPM (that is hard pulling uphill) not sure of the gear it is in. letting off will stop the noise. is this a shift point problem? do the turbos produce this kind of noise? also have a shudder when taking off from stop lasts until I am over five-8 mph. and when slowing to stop there is a very hard downshift. 08 350 SD 6.4 PS. any suggestions?
I have 78000 on truck, purchased with 48000 miles, I was told it had a "full service" oils and fluids, had both filters and 9 quarts replaced at about 60000. the shudder and noise are only noticed when towing 16k fifth wheel, the hard downshift is about 90% of the time loaded or not. and if drive line angle when loaded is common is there a common solution.
not a/c related happens irrespective of ac or fan settings the sound is loud and sounds like a cavitating prop with some gravel thrown in for good measure. could fluid be shearing or boiling off in valve body of tranny. seems that if it was turbo it would severely damaged, and noisy all the time.
Technical Service Bulletins
TSB Main Page :: Year 2007 :: Model F-250 :: TSB 06-23-4
DRIVE-AWAY SHUDDER OR VIBRATION
Publication Date: November 3, 2006
1999-2007 F-Super Duty
This article supersedes TSB 05-17-6 to update the vehicle model years.
Some 1999-2007 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.
Shim the center carrier bracket downward to correct the condition. Refer to the following 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, 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
TA-26 Motorcraft® Threadlock 262
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
OPERATION DESCRIPTION TIME
062304A 1999-2007 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) (Do Not Use With 4602A, 4602A4F) 1.2 Hrs.
062304B 1999-2007 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) (Do Not Use With 4602A, 4602A4F) 1.7 Hrs.
062304C 1999-2007 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 Condition Still Exists Install A Third Shim And Road Test (Includes Time To Raise Vehicle And Install Threadlock) (Do Not Use With 4602A, 4602A4F) 2.2 Hrs.
my video was with the truck unloaded i had to go into second with tow/haul on to recreate the noise, When i am hauling and going uphill losing speed down to about 60 and it shifts down into what i think is second, and I have the torque to regain speed, but the sounds are not good and i must let off and stay at 50. I checked the boots,... entire induction system. didn't find any thing that looked off, no chafing, no cracks, bands are tight, no hot spots, no obvious oil leaks,(might be a spill on top of engine and boots have collected dust), linkages to turbo feel tight and move freely. heat shields are are in great condition and fully fastened, might have a left engine mount that is showing some signs of wear. fluid is bright and no odor, full.
Last edited by Chuck Druce; 07-29-2014 at 01:09 PM.
Reason: oops! third gear not second