Who has the launch studder??

[phicks]

Launch Shutter & Vibration

04. 5 Launch Shutter & Vibration



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I purchased an 04. 5, 4x4 LB,Automatic in late April and have the symptoms as mentioned by John Holmes on page 105, issue 45. When I test drove the monster I noticed a slight shutter exactly at 5 mph coming from a dead stop. Unfortuneately I did not get the truck up to 72 mph or I would have noticed the vibration John is refering to, and would have walked away from the truck. Anyway, I bought the vehicle and was assured by the dealer the launch shutter would be fixed.

The 72 mph vibration became worse at 3,000 miles, the dealer replaced the rear driveline and a majority of the vibration went away. I can still feel it in the truck.

Last week at 7200 miles the dealer tried to fix the launch shutter by increasing the angle of the drivelines, apparently the dcx folks are aware they have a problem. Now,the shutter is worse and I have vibrations at 50,60,and 72 mph. After driving the dealers service tech around, he even agrees there is a problem. The dealer is going to re-install the old bracket, rotate and balance the tires and inspect the front end, then they want to pull the 48re disassemble it and look for problems. Any ideas out there?

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04. 5 Laramie 4x4 LB, HO, 48re, Tow package, Taylor Wing w/lights.

 

[mfrost]

Read some post the other day and it said dealer replaced rear drive shaft, differential, etc and finally found the problem with the front drive shaft. Sounds logical since with my rig it turns all the time.

 

[TCDiesel]

Another Pic

 

[BILLUA]

I have had the launch shudder on my 05 since new. It shuddered from 4 to 9 mph, loaded or unloaded. Towing, the shudder was exactly the same. I am a business owner and also have another career. I do not have the time to waste a day at the dealer dropping my truck off and having a 50 50 shot at getting the truck fixed.



Now, thanks to all of the smart dudes on the TDR I did exactly as above except I used 2 3/16 inch pieces of flat stock 8 inches long . I first installed just one piece of flat stock to check it out. Launch shudder was greatly diminished! It was still noticeable, so I added the second piece of 3/16 flat stock. Now, the shudder can only be felt if I concentrate on it!!! Oo.



Thanks my TDR brethren! This shudder was really bringing me down on my truck.



Regards, Bill