TC shudder - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 25 (permalink) Old 12-19-2009, 04:20 PM Thread Starter
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TC shudder

Can you see it with an AE? Still trying to figure out this damn vibration.

2011 F250 CC 4x4 Sterling Gray Metallic

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post #2 of 25 (permalink) Old 12-19-2009, 07:01 PM
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Re: TC shudder

Look at RPM and Input shaft speed. When the converter is locking up you will either have a pulse width solenoid or an on/off. Converter slip is anything above 50 rpm difference. I really doubt you are going to see it.

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post #3 of 25 (permalink) Old 12-19-2009, 09:24 PM Thread Starter
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Re: TC shudder

The TC (slips as it should) when it is not locked. Once locked there is no slipping. When I get the vibration that I have been chasing it does not slip. Can I accurately say that the vibration is not TC shudder and move on?

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post #4 of 25 (permalink) Old 12-20-2009, 05:38 AM
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Re: TC shudder

Keep your foot on the accelerator pedal while driving a steady speed. Tap the brake pedal just far enough to activate the lights. You can feel the converter unlock and lock back up. You can verify it that way.

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post #5 of 25 (permalink) Old 12-20-2009, 07:15 AM
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Re: TC shudder

Check this out...............


Quote:
TSB 06-23-4

12/06/06

DRIVE-AWAY SHUDDER OR VIBRATION
FORD:
1999-2007 F-Super Duty

This article supersedes TSB 05-17-6 to update the vehicle model years.
ISSUE
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.

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, 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.

1. Before beginning the repair, road test the vehicle to gain a feel for the harshness of the shudder/vibration.

2. Install one (1) shim, (DO NOT use threadlock on the bolts at this point), re-road test vehicle.

a. If condition is corrected, apply threadlock and torque bolts as directed above.

b. If condition is not corrected, re-perform step 2 (to a maximum of three (3) shims) and reevaluate vehicle.

Sound familiar?
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post #6 of 25 (permalink) Old 12-20-2009, 12:52 PM Thread Starter
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Re: TC shudder

Forgot about that. My truck is stock height so I never really thought about shimming the carrier bearing. I find it odd that it didn't need shimming until after 195000 miles. I have some flat stock laying around, I guess I'll make some shims.

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post #7 of 25 (permalink) Old 12-20-2009, 02:26 PM Thread Starter
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Re: TC shudder

Just shimmed it 3/8" and 3/4" with no change. I really don't want to call Brian for a new TC unless I know it's the TC. Any other ideas?

2011 F250 CC 4x4 Sterling Gray Metallic

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post #8 of 25 (permalink) Old 12-20-2009, 03:09 PM Thread Starter
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Re: TC shudder

Since I can't edit my last post, here is a summary of what has been done.

Vibration occurs in OD at the bottom of an incline when the engine loads up a little (generally a 1-2 psi increase in boost). If I give it more pedal the vibration goes away. I started noticing this last December when I drove North on some of the larger hills. I have been noticing it here in GA on smaller grades over the past 6 months.

Replaced carrier bearing and all U-joints
Greased slip yoke
Shimmed carrier bearing 3/8" and 3/4"

The vibration is very inconsistant. Some days it is very noticeable, other days I don't even notice it.

2011 F250 CC 4x4 Sterling Gray Metallic

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post #9 of 25 (permalink) Old 12-20-2009, 05:13 PM
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Re: TC shudder

Ever have the drive shaft balanced? Or checked for missing weights?
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post #10 of 25 (permalink) Old 12-20-2009, 06:29 PM Thread Starter
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Re: TC shudder

I am thinking of pulling the rear drive shaft and taking it up my test grade to see what it does. That should eliminate an unbalanced rear shaft. Just need to find time.

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