Question about 2004 Toyota Tacoma
'04 Taco Prerunner TRD 3.4L SR5, Auto Trans (all stock), 52K miles. What's the acceptable amount of vertical ''play'' in the driveshaft carrier bearing?
I'm experiencing a ''thud'' of sorts after I've come to a complete stop (with pressure still on the brake pedal). Sometimes it doesn't occur until I lift off of the brake to start moving (before I even step on the gas), as if the drivetrain is unloading itself. This occurs even when I lock the rear diff, and whether the truck is empty or fully loaded (800 lbs or so). I've checked the obvious things such as u-joints/motor mounts/carrier bearing. The carrier bearing is the only thing that seems to be suspect as I can move it up and down about 1/2'' in its bracket. This is the first auto trans Toy I've ever owned as well as the first with a carrier bearing so I don't know if this is just a normal characteristic of the unit. Thanks in advance for any advice you can offer me.
The service manual that i have says that the accepted travel is 5mm, what you have - ~15mm - is way too much, the rubber bushing appears to be defective. But i seriously doubt it's the cause of your problem - it can't vibrate if you haven't pressed the gas pedal.
That thud, since you are hearing mainly when you stop, sounds to me that it's coming from the rear suspension as it settles after the breaking. Check al the bushings of the suspension, one might be worn out. If you find a loose one then replace all.
Posted on Aug 02, 2010
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Posted on Jan 02, 2017
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To help differentiate a potential drivetrain problem from other common sources of noise or vibration, it is important to note the speed and driving conditions at which the problem occurs. Unfortunately, it is often difficult to accurately pinpoint drivetrain problems with only a road test. Expand the undercar investigation by putting the vehicle up on the lift, where it is possible to get a good view of what is going on underneath.
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