Advance Adapters 50-9305 - Manual (Page 2)

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.
ADVANCE ADAPTERS, INC. P/N: 50-9305
P.O. Box 247, 4320 Aerotech Center Way New Kit: (11/06)
Paso Robles, CA 93447 PAGE: 2 OF 3
Telephone: (800) 350-2223 Fax: (805) 238-4201 Page Rev. Date: 10-11-13
GM 4L60E TO ATLAS 4 SPEED
TRANSFER CASE-SHORT 23SPL
7. Install the o-ring onto the transmission side of the adapter. Place a small bead of silicone around the mating surface of
the adapter and the transmission.
8. Slide Atlas transfer case over the transmission output shaft, rotating the output yoke as needed to align the splines
between the tranny and transfer case. Next, align the holes of the adapter to the studs in the
transmission and push the Atlas completely onto the transmission. Make
sure there is no gap between the Atlas and the transmission before
installing the nuts.
9. Install the top two lock washers and nuts onto the top two 4L60E
studs and tighten hand tight.
10. Slide the crossmember foot mount over the bottom 4 transmission
studs. Install the remaining washers and the nuts.
11. Tighten all 6 transmission-to-transfer case nuts to approximately
30 ft./lbs.
12. The crossmember foot is threaded to accept transmission
mount Part #716654 or equivalent. Crossmember fabrication
will most likely be needed to mount the transmission mount to the
crossmember.
13. Refer to the shifter instruction sheet again and finish remaining items. Also refer to the Atlas
manual for other guidelines including oil and operation.
NP231 MODIFICATION: There are three cast ribs on the front of the NP231 transfer case that must be modified to allow
the adapter to fit properly. With a grinder, grind down the 3 ribs that protrude up to high shown in the photo or test fit the adapter
to identify these cast ribs. The four bolts on the front retainer must also be replaced for clearance. By doing these modifications
it will allow the adapter to bolt up flush.
Adapter Fit before modifications to
transfer case.