Advance Adapters 50-9808 User Manual

ADVANCE ADAPTERS INC. P/N: 50-9808

P.O. Box 247, 4320 Aerotech Center Way New Item: (08/94)
Paso Robles, CA 93447 PAGE 1 OF 3
Telephone: [phone] Fax: [phone] Page Rev. Date: 01-15-08

GM TRUCK 4WD 4SP MODEL SM465 10 SPLINE

JEEP NP231 TRANSFER CASE 23T (Short Design)

KIT CONSISTS OF:

No. Qty Part No. Description

1. 1 51-9808 CASTING 5.250" LONG

2. 1 52-9700 SPUD SHAFT - SM465/JEEP NP T/C LONG 23 SPL. (Ref: 711397)

3. 1 716515 GASKET

4. 1 716517 GASKET

5. 1 716729 NATIONAL SEAL

6. 1 723701 3/8"-16 HEX NUTS

7. 14 723704 3/8" LOCK WASHER PLT.

8. 1 723711 STUD BOLT 3/8"-16 x 2"

9. 12 723723 H.H.C.S. 3/8"-16 x 1-1/2"

10. 1 723740 S.H.C.S. 3/8"-16 x 1-1/2"

11. 1 JP001 JEEP INSTRUCTION MANUAL

This kit fits both New Process transfer cases with either a long or short T/C input stickout. If your vehicle
was equipped with a long T/C input stickout (replacing a 999/904 transmission) an additional spacer adapter
plate is necessary part number AS-8610. This plate will eliminate a chance of assembly pre-load. Please call
for pricing on this plate, when replacing the Jeep automatics.

PLEASE NOTE THE FOLLOWING:

This adapter kit has an overall length of 17-1/4". The length will be very compatible when replacing the AX15 5 speed
transmission. When using this transmission with the Jeep 6 cylinder, you will need to use the Advance Adapters bellhousing
No. 712571. This adapter could be used with both V8 and Straight 6 engine conversions and will offer the maximum
driveshaft length capable in the Wrangler conversion. DO NOT USE THIS KIT FOR REPLACEMENT OF THE

PEUGEOT 5 SPEED unless you purchase #716053 23T input gear replacement for the 21T transfer case.

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.

ADVANCE ADAPTERS INC. P/N: 50-9808

P.O. Box 247, 4320 Aerotech Center Way New Item: (08/94)
Paso Robles, CA 93447 PAGE 2 OF 3
Telephone: [phone] Fax: [phone] Page Rev. Date: 03-08-01

GM TRUCK 4WD 4SP MODEL SM465 10 SPLINE

JEEP NP231 TRANSFER CASE 23T (Short Design)

GM & CHEVY SM465 4 SPEEDS 1968 & UP:

This transmission can be identified by a case length of 12.5". The casting numbers on the case should be GM465452,
6273212 or 3901127. The top shift cover casting number should be GM3901131. The P.T.O. opening is available on both
sides of the main case. This transmission has a non-synchro first gear. The gear ratios for this transmission are as follows:

First Gear ...................... 6.56

Second Gear ..................3.58

Third Gear ..................... 1.70

Fourth Gear .................. Direct

Reverse ..........................6.09

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 4WD 10 spline output shaft. If your transmission has a 32 spline output shaft,
then you will be required to change to the other design listed.

GM Part No. 6259663 - Output shaft with 10 splines

Make sure that the spud shaft and the main shaft do not bottom out causing interference and eventual bearing
failure. 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 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.

The shaft has a rear bearing that is retained with either a snap ring or special lock nut. Without this snap ring or lock nut
in the proper position, the shaft will walk forward into the input shaft causing severe damage. Make sure that the shaft

is locked by either the lock nut or snap ring to avoid severe damage.

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 countershaft. Make sure that the countershaft 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.

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.