Advance Adapters 50-0231 - Manual (Page 2)

ADVANCE ADAPTERS INC. P/N: 50-0231
P.O. Box 247, 4320 Aerotech Center Way New Item: (10/02)
Paso Robles, CA 93447 PAGE 2 OF 3
Telephone: (800) 350-2223 Fax: (805) 238-4201 Page Rev. Date: 12-10-02
SPECIAL NOTE: The components packaged in this kit have been assembled and machined for specific type of conversions. Modifications to any of the components
will void any possible warranty or return privileges. If you do not fully understand modifications or changes that will be required to complete your conversion, we strongly
recommend that you contact our sales department for more information. This instruction sheet is only to be used for the assembly of Advance Adapter components.
We recommend that a service manual pertaining to your vehicle be obtained for specific torque values, wiring diagrams and other related equipment. These manuals
are normally available at automotive dealerships and parts stores
On the front side of the transfer case, you'll need to remove the 4 bolts that retain the aluminum bearing
retainer. Once this is removed, you'll find a snap ring that retains the input gear to the cases' input bearing.
This snap ring must be removed so that the input gear can be removed from the inside.
On the inside of the transfer case, you'll now be able to remove the planetary assembly. Set the assembly on a work bench and locate the
snap ring that retains the input gear into the planetary housing. Remove the snap ring and lift the input gear out of the planetary housing.
Once the input gear is removed, you'll find a thrust washer that must be reinstalled onto the new 29 spline input. When comparing the two
input gears, you might find a difference between the two. The NP231 transfer case used two styles of front input bearings. The early transfer
case used a wide bearing and the later model used a narrow bearing. Our new input gear is designed around the early style input gear. New
Process changed the design; however, they made it so the early input can still be used into the later model transfer case. The two center
photos below show a later model input compared two our new input. The snap ring grove that holds the gear into the case is in the same
location on both gears, and the shoulder on the gear located on the left compensates the late model input for the narrower bearing.
29 SPL. NP231 TRANSFER CASE INPUT GEAR
DODGE NV4500 29 SPL. TRANSMISSIONS