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Eaton Truetrac High Speed Vibration

387
341
Exp. Type
Autocross
Exp. Level
10-20 Years
Kansas City, Missouri
I'm trying to track down a vibration and I came across a thread on a Mopar forum talking about a high speed vibration associated with Eaton Truetracs.

"the TruTrac's have an design issue that doesn't stabilize the splined components that the axles fit into allowing them to move around inside the TruTrac carrier"

"The driveline was smooth until I exceed 95 mph, and then a significant vibration would start and increase in intensity as speed went well into the triple digits"


This is almost exactly what I'm experiencing but I've never heard anything like this about the TrueTrac. Anyone had similiar issues?
 
387
341
Exp. Type
Autocross
Exp. Level
10-20 Years
Kansas City, Missouri
Three years on mine and no issues. I didn't read anything about True Trac and vibrations. Billy Johnson said he loved them and that was enough for me.
Everyone seems to love them which is why I bought one. I'm not sure it's the cause of my issue but just came across that information and thought I'd see if there was anything else to it.
 

xr7

TMO Addict?
392
374
Exp. Type
Autocross
Exp. Level
5-10 Years
Minnesota
Friend of mine had a vibration is his machine for years, nobody could figure it out. After checking driveshaft angles, u-joints and driveshaft balance for the umpteenth time it was discovered that the slip yoke was to short to fully engage the tailshaft bushing in the trans. Maybe?
 

xr7

TMO Addict?
392
374
Exp. Type
Autocross
Exp. Level
5-10 Years
Minnesota
Drop cover and see if there is any debris in the bottom of the diff housing. My guess would be bearing problem. The side gears only rotate in the diff carrier when you are in a turn otherwise they rotate with the carrier housing.
 
387
341
Exp. Type
Autocross
Exp. Level
10-20 Years
Kansas City, Missouri
Drop cover and see if there is any debris in the bottom of the diff housing. My guess would be bearing problem. The side gears only rotate in the diff carrier when you are in a turn otherwise they rotate with the carrier housing.
Inside the diff looks perfect. When I get some time I'm going to pull the axles and carrier to look at the bearings but I have no reason to suspect they are bad.
 

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