Advance Adapters 50-9812 User Manual

ADVANCE ADAPTERS INC. P/N: 50-9812

P.O. Box 247, 4320 Aerotech Center Way New Item: (08/95)
Paso Robles, CA 93447 PAGE 1 OF 3
Telephone: [phone] Fax: [phone] Page Rev. Date: 06-30-08

GM TRUCK 2WD 4SP MODEL SM465 35 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 52-9807 SP UD SH AFT - 35 T INT ERNAL x 23T EXTERNAL

3. 1 51-8603 3/4" SPACER PLATE

4. 1 716457 SET COLLAR

5. 1 716515 GASKET

6. 1 716517 GASKET

7. 1 716729 NATIONAL SEAL

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

9. 14 723704 3/8" LOCK WASHER PLT.

10. 1 723711 STUD BOLT 3/8"-16 x 2"

11. 6 723723 H.H.C.S. 3/8"-16 x 1-1/2"

12. 6 723725 H.H.C.S. 3/8"-16 x 2"

13. 1 JP001 JEEP INSTRUCTION MANUAL

PLEASE NOTE THE FOLLOWING:

This adapter kit has an overall length of 17-1/4" to 18-1/4". The length will be very compatible when replacing the AX15
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
driveline 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.

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 Part

No. AS-8603 is necessary. This plate will eliminate a chance of assembly pre-load. Please call for pricing on this

plate, when replacing the Jeep automatics.

On 2WD transmissions that have the 35 tooth spline size, the main shaft was held in its lateral position by the use of the
original output yoke. Since the yoke has been removed, the main shaft will require a special set collar to be installed behind
the rear main bearing of the stock 4 speed transmission. This special collar must be installed directly against the back of
the bearing and then secured onto the main shaft. This installation will prevent the shaft from slipping up inside the rear
output bearing. This kit is for the 23 spline NP231 transfer cases only. We offer a special mounting bracket for the
transfer case shift linkage. This bracket, P/N 715545, must be ordered separately.

GM & CHEVY SM465 4 SPEEDS 1968 & UP:

This transmission can be identified by a case length of 12". 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 Fourth Gear ............... Direct

Third Gear .....................1.70 Reverse....................... 6.09

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: 50-9812

P.O. Box 247, 4320 Aerotech Center Way New Item: (08/95)
Paso Robles, CA 93447 PAGE 2 OF 3
Telephone: [phone] Fax: [phone] Page Rev. Date: 01-15-08

GM TRUCK 2WD 4SP MODEL SM465 35 SPLINE

JEEP NP231 TRANSFER CASE 23T (Short Design)

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.

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.