Advance Adapters 50-1701 - Manual (Page 2)

4L80E/85E TO TOYOTA
LAND CRUISER 1980-89 FJ60
INSTALLATION INSTRUCTIONS: 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 the cut off location of the transmission output shaft may
be slightly longer than what we have allowed for. When coupling the adapter housing and spud shaft to the back of the
transmission, there should not be any interference.
DO NOT FORCE THE NEW TAILHOUSING ONTO THE
TRANSMISSION. If assistance is needed, please feel free to call the number listed above. When assembling the adapter
housing to the transmission case, we have provided you with a new gasket to prevent fluid leakage. This gasket is a stock
GM item that is used on all 4L80E installations.
On most installations, a slight pan modification will be required for clearance of the front universal yoke. This modification
will be necessary on both the metal pan and the aluminum transmission case. The area where the pan and case come together
(that has the bolt holding the two) will need to be ground down almost even with the body of the bolt. The bolt may need
to be replaced with a socket head cap screw. These modifications can be done with the pan still attached to the transmission
case. The metal pan will need the corner recessed approximately 1/2". These modifications should be made prior to
assembly into the vehicle. In order to allow for additional front driveline clearance, we recommend that the engine and
transfer case be offset to the driver's side on vehicles having front driveshafts located on the passenger's side. On Jeep
and Toyota Land Cruiser conversions, this can be approximately 1" offset of centerline.
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 should be a cable linkage.
The back of the adapter must have a sealed bearing installed with the new snap ring indexing into the front of the transfer
case. This bearing is trapped between the adapter housing and the transfer case. This bearing is trapped between the adapter
housing and the transfer case. With the shaft and two adapters in position, you must then install P/N 716142 bushing for
spacing the first transfer case gear. This bushing is very critical and will establish the actual position of the transfer case
gears. Once the gears are installed, use the stock transfer case lock nut to retain the gears in position. The stock Toyota
nut is P/N 90179-26004.
The stock transfer case shift linkage must have a new mounting bracket fabricated. We do not offer any brackets for this
stock linkage.
The 4L80E transmission is normally equipped with an internal reluctor ring on both the transmission input shaft and
output shaft. The computer takes both of these reading for the proper shifting and operation of this transmission. We
have always ignored the reluctor ring requirement for this transmission since it is internally regulated. We have now
learned that the rear reluctor ring is not always installed into the transmission. The basic rule of thumb is 4WD transmis-
sions up to 1996 should have a rear reluctor ring in the main transmission case. All 2WD transmissions should have the
rear reluctor in the main transmission case. The 1997 & newer 4WD 4L80E transmissions had a sensor provision;
however, the reluctor ring in the transmission was left out. This adapter does not offer any type of reluctor pick up on
the adapter, so you should make sure you transmission has the reluctor installed in the transmission case.
Note: The
information on years and models of the 4L80E transmission mentioned in the above section was obtained from various
sources. You should always verify what your transmission is equipped with before beginning a conversion with the
4L80E transmission.
ADVANCE ADAPTERS INC. P/N: 50-1701
P.O. Box 247, 4320 Aerotech Center Way
Paso Robles, CA 93447
PAGE 2 OF 3
Telephone: (800) 350-2223 Fax: (805) 238-4201 Page Rev. Date: 08-01-11
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.