Advance Adapters 50-4402 - Manual (Page 2)

FORD AOD OVERDRIVE TO
TOYOTA TRUCK TRANSFER CASE
ADVANCE ADAPTERS INC. P/N: 50-4402
P.O. Box 247, 4320 Aerotech Center Way
Paso Robles, CA 93447
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Telephone: (800) 350-2223 Fax: (805) 238-4201 Page Rev. Date: 01-16-12
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.
GENERAL INFORMATION:
1. This transmission case length is 20-1/2". The tailhousing that we use is the stock Ford 4WD housing. You should
have no difficulty assembling the new housing on the back of your AOD transmission.
2. The new shaft that we supplied with this kit fits Ford AOD transmissions 1988 & up. This output shaft must be
shortened 3/8" to prevent pre-loading of adapter bearing.
FORD AOD AUTOMATIC TRANSMISSIONS:
When installing the new tailhousing on the back of your transmission, it may be necessary to trial fit the adapter in position
and make sure that the linkage has all the proper clearance on the internal cavity of the adapter. The bolting of the tailhousing
to the main transmission may need a slight amount of grinding for proper head clearance due to the aluminum sand casting
tolerances.
Make sure the bearing retainer clip found on the front side of some transfer cases is removed prior to assembly of the new
adapter. This clip was used to retain lower bearing in Toyota transfer case.
The coupler in this kit is made for a 21 spline male shaft that protrudes from the front of your transfer case. When replacing
transmissions that were equipped with turbo-charged engines, you will need to use a 23 spline coupler in place of the 21
spline coupler furnished with this kit.
When installing the new transfer case adapter, make sure that the coupler and the output shaft do not bottom out. We have
found on occasion that a transmission output shaft may be slightly longer than we have allowed for; and when coupling
into our new spud shaft, we find a small amount of interference. The adapter housing and spud shaft must be assembled
to the back of the transmission without interference.
DO NOT FORCE THE NEW TAILHOUSING ONTO THE
TRANSMISSION. If assistance is needed, please feel free to call the number listed above.
The linkage on the Toyota transfer cases will vary. Some have the control lever on the tailhousing of the transmission,
while others have it on the transfer case. This adapter can be used with either style and if the opening is not used on the
top of the new housing, you will need to cover the square opening.
If you have a 1989 - 95 electronic fuel injected 4 cylinder. The transfer case shifter linkage was relocated on the 5 speed
tailhousing. The shifter mechanism for both the transfer case and the transmission were one unit. When using this transfer
case with any of our transfer case adapters, you must either modify or replace your transfer case. By changing the shifter
rods from a 1984-88 (Carbureted 4 cyl.) transfer case or using Toyota part numbers 36314-35020 (high-low rod) and 36313-
35020 (front drive rod), you will be able to retain your stock transfer case. The other option is to purchase a 1984-88
(Carbureted 4 cyl.) transfer case.
All installations will require the use of a transmission cooler. The cooler can be either installed in the radiator or a remote
location is acceptable. The transmission shift control can either be a Hurst floor mounted type shifter or sometimes the
existing column shift can be modified on certain applications.
This adapter will work on all Toyota 4WD trucks, 1979 through November 1987.