Advance Adapters 50-4801 User Manual

ADVANCE ADAPTERS INC. P/N: 50-4801

P.O. Box 247, 4320 Aerotech Center Way Old Part No: 711048-6
Paso Robles, CA 93447 PAGE 1 OF 3
Telephone: [phone] Fax: [phone] Page Rev. Date: 05-13-03

GM TRUCK 4 SP. 2WD MODEL SM465 35 SPL.

TO JEEP & SCOUT DANA 18/20 (Spud Design)

KIT CONSISTS OF:
No. Qty Part No. Description

1. 1 51-8700 ADAPTER CASTING (Ref. 711187)

2. 1 52-4800 SPUD SHAFT W/6 TOOTH

(Ref: 711348-6)

3. 1 716457 SET COLLAR

4. 1 716515 GASKET

5. 1 716568 GASKET

6. 2 723701 3/8"-16 NUT

7. 8 723704 3/8" LOCK WASHER

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

9. 6 723723 H.H.C.S. 3/8"-16 x 1-1/2"

10. 2 724351 SET SCREW

11. 1 728701 NYLON LOCK NUT

NOTE: Crossmember block may need to be shortened to fit on

stock rubber crossmember on certain applications.

SPECIAL INSTALLATION NOTE:

The rear output shaft bearing that is located in the back of the transmission main case has an external snap ring
around the outside diameter of the bearing. The snap ring is trapped between the transmission case and the new
Advance Adapters housing. By trapping the snap ring, the main shaft location is held in a firm location and the
shaft is prevented from drifting either forward or rearward. The thickness of the original snap ring varies
between a 2WD GM transmission and a 4WD GM transmission. Since we use the same adapter housing for
both locations, it may be necessary to modify the thickness of the snap ring for installation with the new adapter
housing. This can be done by simply grinding down the thickness or by doubling up on the gasket between the
transmission and the transfer case. Not all applications will have this problem, but you should be aware of this
variation. Two wheel drive transmissions use a thinner snap ring.

OPTIONAL ITEMS:
Qty Part No. Description

1 716003 CROSSMEMBER MT
1 716302 SEALED BRG
1 716001 or

716002 T90/T86 BRG. RET

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: 50-4801

P.O. Box 247, 4320 Aerotech Center Way Old Part No: 711048-6
Paso Robles, CA 93447 PAGE 2 OF 3
Telephone: [phone] Fax: [phone] Page Rev. Date: 05-13-03

GM TRUCK 4 SP. 2WD MODEL SM465 35 SPL.

TO JEEP & SCOUT DANA 18/20 (Spud Design)

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
Third Gear 1.70
Fourth Gear Direct
Reverse 6.09

In order to use this transmission with the Advance Adapter kits, you must make sure that you have the proper output shaft
from the original 4 speed transmission to couple to the new adapter. Currently, we manufacture the adapters for both 35
spline and 10 spline output shafts. If your transmission has a 31 spline output shaft, then you will be required to change
to the other designs listed. The correct transmission can be found in all 2WD vehicles, 1968 -88. The transmissions which
are not compatible are 1981 and up four wheel drive K1, K2. The four wheel drive K3 models are equipped with a 10 spline
output shaft that can be used with our kits. The part numbers for the new shaft, if required, are as follows:

GM Part No. 6259663 - Output shaft with 10 splines
GM Part No. 3932265 - Output shaft with 35 splines

The output shaft is held into place by the transmission output yoke and nut. When using this kit, the nut and yoke are
removed. To retain the output shaft from moving back and forth in the transmission, we've included a set collar to hold
the output shaft in the proper position in reference to the rear output bearing and transmission case. The set collar should
fit snug up against the rear output bearing and then locked into position.

The new spud shaft that we have furnished with your kit must slip over the output shaft without bottoming out or causing
spline interference. The spud shaft is located in the correct position by using the bearing that is mounted on the back side
of the new adapter. With the spud shaft in position and the adapter on the new transmission, you must be able to rotate
the shaft freely. The threaded area of the stock output shaft must be removed for use with the Advance Adapters coupler.
This can be done with an abrasive cutoff saw and must be done for clearance inside the new adapter coupler.

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.

The right side of the main case will need to be ground off for clearance of the front output yoke on certain installations.
We recommend a trial fit with your transfer case and front output yoke so that any modifications that may be required can
be done before final installation. This is a good time to set up the shifter linkage for the transfer case controls.

Make sure that the adapter fits flush against the back of the transmission and indexes properly over the two bearings.

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.