Advance Adapters 50-0402 - Manual (Page 2)

GM 4L60E AUTOMATIC TO
JEEP NP231 23 SPLINE TRANSFER CASE
ADVANCE ADAPTERS, INC. P/N: 50-0402
P. O. Box 247, 4320 Aerotech Center Way New Item: (01/98)
Paso Robles, CA 93447 PAGE: 2 OF 3
Telephone: (800) 350-2223 Fax: (805) 238-4201 Page Rev. Date: 07-19-04
SPECIAL NOTE: The components packaged in this kit have been assembled and machined for specific types of conversions. Modifications to any of the
components will void any possible warranty or return privileges. If you do not fully understand the 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 vales, wiring diagrams and
other related equipment. These manuals are normally available at automotive dealerships and parts stores.
GM 4L60 4 SPEED AUTOMATIC
When installing the new transfer case adapter, make sure that the output shaft doesn't 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 the transfer case. The
adapter housing must be assembled between the transmission and transfer case without interference. DO NOT FORCE THE
NEW ADAPTER HOUSINGS TOGETHER . If assistance is needed, please feel free to call us on our toll free number, (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. In order to allow for additional front drive line clearance,
we recommend that the engine and transfer case be offset to the driver's side on vehicles having front drive shafts located on
the passenger's side. On Jeep and Toyota Land Cruiser conversions, this can be approximately 1" offset of centerline.
NOTE: You will have to modify your stock input sleeve. Your sleeve will need to be shortened so that it protrudes
1.5" from the front of your stock transfer case. Refer to page 3 of 3.
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.
The bolts that hold the new adapter to the main case will require a metric thread. We have included 4 new bolts for this use.
The 4L60 works with a reluctor ring. The reluctor ring and sensor have been provided with this kit. When installing the reluctor
ring on the shaft, there is a shoulder on the shaft that seats the ring in the proper location. This ring is a light press fit.
The Advance Adapter casting has been drilled and tapped for your new sensor. To install the sensor, first apply Loctite to the
sensor threads. Next install the sensor and torque to approximately 20 in.-lbs. Check the air gap between the sensor and the
top of the teeth on the reluctor ring. This dimension should be between 0.009" and 0.013". If not within this tolerance, adjust
the torque spec. until gap is within tolerance.