At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
The A13-56 was used on manual transmissions, and the 1345 was used on automatic transmissions.The A13-56 was used on manual transmissions, and the 1345 was used on automatic transmissions.
You can't post conmments that contain an email address.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
The Borg Warner (BW) model 4493/4494 NR4 transfer case is a 2-speed, full-time 4WD, transfer case. The transfer case has an external planetary type differential, which has 2 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. A high/low planetary carrier assembly provides the high and low ranges, which is a 6-pinion gear, sun gear, and annulus gear arrangement, giving a 2.64 low range reduction ratio in the BW 4493 and a 4:1 ratio in the BW 4494.
Locate the metal tag or stamp number on the case, ford is likely a Borg-Warner, shape of the oil pan can narrow your serch take a picture of it, compare to the charts online transmission websites.
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).
×