Advance Adapters 50-9812 - Manual (Page 2)

GM TRUCK 2WD 4SP MODEL SM465 35 SPLINE
JEEP NP231 TRANSFER CASE 23T (Short Design)
ADVANCE ADAPTERS INC. P/N: 50-9812
P.O. Box 247, 4320 Aerotech Center Way New Item: (08/95)
Paso Robles, CA 93447 PAGE 2 OF 3
Telephone: (800) 350-2223 Fax: (805) 238-4201 Page Rev. Date: 01-15-08
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.
In order to use this transmission with our kits, you must make sure that you have the proper output shaft from the original
4 speed transmission to couple to the new Advance adapter. Currently, we manufacture the adapters for both 35 spline
and 10 spline output shafts. This kit uses a 2WD 35 spline output shaft. Make sure that the spud shaft and the main
shaft do not bottom out causing interference and eventual bearing failure. If your transmission has a 32 spline
output shaft, then you will be required to change to the other design listed.
GM Part No. 3932265 - Output shaft with 35 splines
The new spud shaft that we have furnished with your kit must slip over the output shaft without bottoming out or causing
spline interference. With the spud shaft in position and the adapter on the new transmission, you must be able to rotate
the shaft freely. There are certain applications that may require a slight grinding of the original output shaft to prevent
the original shaft from bottoming out inside the new coupler. The special coupler has the ability to float between the 4
speed output shaft and the 23 spline input gear. Make sure that the limits will not permit a disengagement of either of the
splines. On this transmission the output shaft must be shortened (See page 3). This can be done with an abrasive cutoff
saw, and must be done for clearance inside the new adapter coupler. This can also be done by looking at the rear of your
stock transmission. Look to see if the output shaft is flush or protrudes from the back of this transmission.
The adapter plate that we have furnished for your new transmission has a special pocket that has been machined into the
transmission side for clearance over the reverse counter shaft. Make sure that the counter shaft in the transmission is
rotated for proper engagement into the new adapter housing.
Make sure that the adapter fits flush against the back of the transmission and indexes properly over the two bearings. You
must use the gasket provided between the adapter housing and transfer case. This will prevent oil from exiting between
the two.