Question about 2002 Oldsmobile Bravada
They shoul kick in when you have slip. If they do not then you may be having a malfunction in the system.
Posted on Oct 27, 2012
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Posted on Jan 02, 2017
your problem is more than likely one of a few problems
there are two hoses on your transfer case one sucks in one blows out if one gets cloged it will go out completly so have it checked its starting.
or check the oil in the transfer case
Posted on Apr 10, 2009
I can tell you exactly when my mechanic can find the part cheap enough for me to afford to replace. He's telling me its the computer sensor that automatically switches to 4WD. For now, he has taken it out so that it is in 2WD. The only thing is that the service AWD light stays on, but it works fine now even though it is only 2WD. I'll worry more about the part when it gets closer to winter. By the way, I think he said the part was $400-500 brand new. We are trying to find an after market or used one.
Posted on Jul 27, 2009
SOURCE: 02 olds bravada locked in awd
This is very common. It is the transfer case encoder motor. That controls the shifting of the transfer case. It needs to be replaced. Its not that hard to replace but the part is expensive. You will also need to replace the front drive shaft boot clamps, you have to cut the originals off when removing the front drive shaft. I've replaced many of these for myself and others. Good luck I hope this helps you.
Posted on Aug 14, 2009
I'm pretty sure the computer controlled NP-136 transfer case (which
uses two speed sensors to sense the difference in speed between the
front output shaft and the rear output shaft, and engages the front
axle accordingly) was installed in 1998 and later models.
These trucks (mine included) use an "Active On Demand" transfer case. Basically its a normal 4x4 transfer case with a big electrically actuated (by way of a motor) clutch that connects the front prop-shaft (which is being spun by the wheels full time) to the transfer case front output. Its all in the transfer case.
Good luck and hope this help, check all the fuses and the wire harness to the encoder motor and replace the encoder motor if it has gone bad. Try bring it to a transmission shop that is familiar with the AWD system on your Bravada. The earlier years were a different system, 1998 was when the change was made. 1997 and earlier use the Borg-Warner 4472, which is always engaged with the use of the viscous coupling. Both were marketed as "SmartTrak" though.
Sounds to me like the transfer case actuator motor is either faulty or it is being told to be on all the time (which it shouldn't be).
Posted on Dec 15, 2009
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