Suburban front diff. Whining / binding

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  #1  
Old 11-14-09, 08:17 AM
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Join Date: Nov 2009
Location: Colorado
Posts: 34
Suburban front diff. Whining / binding

04 66K Suburban.

Took it into dealer to replace transfer case encoder sensor. They also found right front diff. axle seal leaking. They replaced seal and"topped off fluid" in front differential.

First snow. I put it in 4hi and when driving, it sounded like 4lo. When I went around sharp corner, Suburban started to shutter. When I tried to back out of a parking space and then turned the steering wheel sharp left, the Suburban wouldn't move.

Any ideas on how they screwed it up?

Are there any shims / spacers that they may have left out?

Thanks,

FJ
 
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  #2  
Old 11-14-09, 08:48 AM
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What was the reason for you taking it to the shop in the first place? My guess is that it's stuck in low from your description.
 
  #3  
Old 11-14-09, 09:08 AM
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Was getting an intermittent "Service 4WD" message.

Code indicated that the encoder motor sensor was going bad.

This sensor tells the position of the front drive shaft.

Does feel like it is in 4lo.

Don't see how that would be related. Push button on dah shows high.

Also seems noiser in AWD.

????
 
  #4  
Old 11-14-09, 09:13 AM
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Also, was able to shift from AWD to "4HI" on fly and drive 30mph. You are not supposed to be able to go from AWD, 2HI, or 4HI to 4LO without stopping and putting in neutral.

Would expect in 4LO that the egnine would really be reving at 30mph.

??
 
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