2004 Tahoe All Wheel Drive not working

[Chris Ross]

Did you confirm NR4 while you were out there?

Would that be in the owners manual? If not what should I look for in the glove box? Thanks

 

[adventurenali92]

Would that be in the owners manual? If not what should I look for in the glove box? Thanks

The RPO codes are listed on a big white sticker on the inside of the glove box. Look for NR4 in the list of codes.

 

[Doubeleive]

did it go up in 4lo without the abs kicking in?

 

[Chris Ross]

The RPO codes are listed on a big white sticker on the inside of the glove box. Look for NR4 in the list of codes.

Yes I checked in it does say NR4

 

[Chris Ross]

did it go up in 4lo without the abs kicking in?

Yes four wheel drive works great in 4 Low there's definitely power going to the front tires it doesn't spin at all

 

[Chris Ross]

Did you confirm NR4 while you were out there?

Yes it has the NR4

 

[HiHoeSilver]

Hmmm. I'm not very familiar with the AWD systems. Do some research on the transfer case @swathdiver listed. He may know more, as well.

 

[swathdiver]

That transfer case has an external planetary differential with two sets of pinion gears. My guess is that one of them is inoperable but I do not know enough. I suggest that you buy a subscription to AllDataDIY and use that to help troubleshoot the problem. Access to a Tech2 to see what's going on inside electrically and electronically would be nice too.

 

[TM98]

I have the same system as you.

NR4 Transfercase Description:



The Borg Warner (BW) model 4482 NR4 transfer case is a two-speed, full time 4WD, transfer case. The transfer case has an external planetary type differential, which has two different sets of pinion gears. The planetary differential provides a 40/60 torque split front/rear full time. This means the front and rear propeller shafts are constantly being driven for maximum traction in all conditions.

While in the 4HI mode, the transfer case external type planetary differential functions the same as a typical rear axle differential. The transfer case differential pinion gears function as the spider gears, and the sun gears function as the side gears.

The following actions occur because of the planetary differential:

• If the vehicle is on a hoist, and in the 4HI mode, the front propeller shaft can be rotated by hand.

• The vehicle cannot be driven in the 4HI mode if one propeller shaft is removed.

• Operating the vehicle on the hoist, in the 4HI mode, can damage the differential pinion gears, by over-spinning.

• Operating the vehicle with one propeller shaft removed, in the 4HI mode, causes over-spinning of the differential pinion gears.

The BW 4482 design of the planetary differential allows use with the Vehicle Stability Enhancement System (VSES) vehicles. The VSES takes use of the planetary differential, by applying braking to a tire that has less traction and dividing the engine torque to the other axle. A high/low planetary carrier assembly provides the high and low ranges, which is a 4-pinion gear, sun gear, and annulus gear arrangement, giving a 2.64 low range reduction ratio.

The BW 4482 case halves are high-pressure die-cast magnesium. Ball bearings support the input shaft, the front output shaft, and the rear output shaft. A needle roller bearing is located inside of the input shaft gear to support the front of the mainshaft. The rear of the mainshaft is supported by a bronze bearing inside the rear output shaft. The transfer case requires DEXRON®III ATF Fluid GM P/N 12378470 (Canadian P/N 10952622), which is red in color. An oil pump pumps the fluid through the mainshaft oil gallery to the gears and bearings.

 

[Chris Ross]

I have the same system as you.

NR4 Transfercase Description:



The Borg Warner (BW) model 4482 NR4 transfer case is a two-speed, full time 4WD, transfer case. The transfer case has an external planetary type differential, which has two different sets of pinion gears. The planetary differential provides a 40/60 torque split front/rear full time. This means the front and rear propeller shafts are constantly being driven for maximum traction in all conditions.

While in the 4HI mode, the transfer case external type planetary differential functions the same as a typical rear axle differential. The transfer case differential pinion gears function as the spider gears, and the sun gears function as the side gears.

The following actions occur because of the planetary differential:

• If the vehicle is on a hoist, and in the 4HI mode, the front propeller shaft can be rotated by hand.

• The vehicle cannot be driven in the 4HI mode if one propeller shaft is removed.

• Operating the vehicle on the hoist, in the 4HI mode, can damage the differential pinion gears, by over-spinning.

• Operating the vehicle with one propeller shaft removed, in the 4HI mode, causes over-spinning of the differential pinion gears.

The BW 4482 design of the planetary differential allows use with the Vehicle Stability Enhancement System (VSES) vehicles. The VSES takes use of the planetary differential, by applying braking to a tire that has less traction and dividing the engine torque to the other axle. A high/low planetary carrier assembly provides the high and low ranges, which is a 4-pinion gear, sun gear, and annulus gear arrangement, giving a 2.64 low range reduction ratio.

The BW 4482 case halves are high-pressure die-cast magnesium. Ball bearings support the input shaft, the front output shaft, and the rear output shaft. A needle roller bearing is located inside of the input shaft gear to support the front of the mainshaft. The rear of the mainshaft is supported by a bronze bearing inside the rear output shaft. The transfer case requires DEXRON®III ATF Fluid GM P/N 12378470 (Canadian P/N 10952622), which is red in color. An oil pump pumps the fluid through the mainshaft oil gallery to the gears and bearings.

So do you think I need to replace the whole Borg Warner 4482, RPO NR4. or could it possibly be a electric transfer case motor?