Advance Adapters 50-5906D - Manual (Page 7)

TX2 CRAWLER ADAPTER
TOYOTA 4WD TRUCKS 23T INPUT
ADVANCE ADAPTERS INC. P/N: 50-5906D
P.O. Box 247, 4320 Aerotech Center Way Old Part No: MC03
Paso Robles, CA 93447 PAGE 7 OF 9
Telephone: (800) 350-2223 Fax: (805) 238-4201 Page Rev. Date: 08-10-09
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.
INSTALLATION OF THE GEAR BOX
When installing the additional reduction gear box into your Toyota truck, you will need to make sure that the truck is
properly secured for transfer case removal. Once the vehicle is secured, both of the existing driveshafts will need to be
removed along with the crossmember and transfer case. With the transfer case removed, the back side of the 5 speed
transmission can then be inspected for the installation of the new reduction gear box. The output shaft should be 21 spline
and should index perfectly into the Toyota reduction box. Make sure that the seal and the splines are properly fitted
together.
With the new crawl box now in position, you can now assemble the transfer case back to the transmission and reduction
box assembly. If the front driveshaft does not interfere, the original crossmember can remain in its original location.
Vehicles with a 4" plus suspension lift or long front shackles will require some crossmember clearance modifications.
Lengthen the 4WD indicator light and install a new speedometer extension cable is
necessary for this conversion. We have provided a special bushing that can be used
to manufacture a speedometer cable extension. This bushing will need to be
furnished to your local cable manufacturer for the new 12 inch extension. We also
offer a custom speedometer extension, which is sold separately under P/N 716186-C.
Install the shifter levers for both the transfer case and the reduction box, making the necessary modifications to the
floorboard.
You will be required to lengthen the front driveshaft. If the truck is equipped with center support bearing on the rear
driveshaft, remove it and lengthen the driveshaft. Otherwise, shorten it as required.
The new crawl box and transfer case gear oil should be one and the same. We do not require any seal between the two
units. The same fill plug and oil level can be used.