Auto mode turns on 4x4 mode

[JohnnyParadis]

Hello All,

Recently I can't run in Auto mode without my 2013 Tahoe LTZ (w/only 75k miles) going straight into 4WD, even with no traction loss. I've got to switch to 2WD to unlock 4WD. Not sure if it matters but I removed fuse #9 (ABS, stabilitrack, & traction control) over a year ago, so I wouldn't have to manually turn off these useless functions (IMO) every time I get in my vehicle.
Any help would be much appreciated, thanks.

 

[wjburken]

Hello All,

Recently I can't run in Auto mode without my 2013 Tahoe LTZ (w/only 75k miles) going straight into 4WD, even with no traction loss. I've got to switch to 2WD to unlock 4WD. Not sure if it matters but I removed fuse #9 (ABS, stabilitrack, & traction control) over a year ago, so I wouldn't have to manually turn off these useless functions (IMO) every time I get in my vehicle.
Any help would be much appreciated, thanks.

Auto4WD is designed to engage 4WD when it senses wheel slippage. How can it sense wheel slippage if the systems that sense it are disabled?

 

[Fless]

Auto4WD is designed to engage 4WD when it senses wheel slippage. How can it sense wheel slippage if the systems that sense it are disabled?

 

[B-train]

I agree with @wjburken

I'd pop the fuse back in and see how it works. The Auto selection constantly monitors wheel speed and percent slippage determined by said speed sensors. Worth a shot.

 

[B-train]

Or you have 2 different size tires front to back and the rolling speeds are different.....

 

[JohnnyParadis]

Thank you gentlemen...best regards, Captain Obvious

 

[PatDTN]

I'd check Tire pressures all the way around. When I bought my Tahoe it had 4 mismatched tires and did that.

 

[intheburbs]

Hello All,

Recently I can't run in Auto mode without my 2013 Tahoe LTZ (w/only 75k miles) going straight into 4WD, even with no traction loss. I've got to switch to 2WD to unlock 4WD. Not sure if it matters but I removed fuse #9 (ABS, stabilitrack, & traction control) over a year ago, so I wouldn't have to manually turn off these useless functions (IMO) every time I get in my vehicle.
Any help would be much appreciated, thanks.

Just kinda curious why you feel the need to turn off stabilitrack and traction control every time?

I can't say for sure how the Auto 4wd system detects wheel slippage to engage the transfer case, but I'd wager it uses the sensors from one or more of those systems, so with the fuse out the result is the transfer case engaging in "auto."

 

[PatDTN]

Just kinda curious why you feel the need to turn off stabilitrack and traction control every time?

I recently discovered drive ability improves with traction control turned off in my Tahoe. With it on it resists accelerating in curves even a little that won't cause wheelspin. Seems to help just driving on the interstate. Even with brand new Michelin tires inflated to the same pressure.

 

[91RS]

Do not use auto 4WD on pavement. You will destroy the front differential.