Advance Adapters 50-0408A - Manual (Page 2)

ADVANCE ADAPTERS INC. P/N: 50-0408A
P.O. Box 247, 4320 Aerotech Center Way New Item:
Paso Robles, CA 93447 PAGE 2 OF 4
Telephone: (800) 350-2223 Fax: (805) 238-4201 Page Rev. Date: 11-13-11
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.
INSTALLATION INSTRUCTIONS: This kit is for the GM 4L60 4 speed automatics to all Toyota Land Cruiser split-type transfer
cases. The design of this kit utilizes two shafts. The first shaft is your 4L60 output shaft that is cutoff to the length illustrated on page 3.
With the shaft cut to the proper length, the new Advance Adapter spud shaft can now be put into position. The new spud shaft should
be pressed into the new rear bearing so the external snap ring is towards the threaded end of the shaft. With the bearing on the spud shaft,
you can now install the assembly into the back portion of the adapter. The external snap ring will lock the spud shaft into position. A special
heat-treated gear spacer has been provided for determining the exact gear location. Before installing the spacer on the spud shaft, we recommend
applying some RTV silicone on the spline portion of the spud shaft that this spacer covers. This will prevent any fluid transfer between the
two gear boxes. The threaded portion on the end of the spud shaft will be identical to the 4 speed transmission being replaced. The original
gears, bearing, washer and nut will all be reused onto the new spud shaft.
The stock transfer case lock nut is Toyota P/N 90179-26004 . The
transfer case indexes to the adapter off the new rear bearing and we also use the lower dowel pin on the transfer case. The upper dowel pin
is not used and our casting hole has been over sized to fit over the stock dowel pin location. The bearing give the proper indexing and the lower
dowel provides the proper rotation.
On the right side of the adapter, you will be able to mount the special shift bracket illustrated on page 4. This bracket should position your
shifter in the original floor board location. On FJ60 vehicles that are installing the Chevy V8 engine using the 4L60 transmission, you should
be able to leave the transfer case in its original position. The bottom of the transfer case adapter has a support mount that is identical to the
support that was previously used on the bottom of the 4 speed transmission. The original crossmember support will need to be repositioned
directly beneath the new transfer case adapter housing.
GM 4L60 4 SPEED AUTOMATIC: 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 us toll free number at 1-800-350-2223.
When assembling the adapter housing to the transmission case, we have provided you with a new square type "O"-ring seal to prevent fluid
leakage. This seal is a stock GM item that is used on all 4L60 installations. On most installations, a slight pan modification may be required
for clearance of the front Universal yoke.
The Advance Adapter casting has been drilled and tapped for your new sensor. With the sensor installed, the gap between the sensor and the
ring should be .010" to .012" air gap. The 51-0405 casting does have two sensor holes drilled and tapped for other applications. These hole should
plugged with the brass plugs included in the kit. A small dab of silicone should be used on the threads to seal.
CROSSMEMBER NOTE: This casting is designed around the FJ60 manual transmission crossmember mount. On some manual
applications and all automatic stock transmissions, you may need to purchase Toyota #12371-61020. This part is the new Toyota rubber
mount.
GM 4L60E HEX AUTOMATIC OVERDRIVE
TO LAND CRUISERS 1980-89 FJ60 (4 SPEED)
NOTE: This kit requires the 2WD output shaft to be shortened. Please note that the cut off location on the output
shaft must be made after the 1-1/2" adapter is installed on the transmission. This 51-0405 adapter make the hex
pattern 4L60E transmission look just like the square bolt pattern transmission, and the cut off location for the
output shaft is shown on this instruction sheet is for the square bolt pattern transmission.