Advance Adapters 50-6409 - Manual

ADVANCE ADAPTERS INC. P/N: 50-6409
P.O. Box 247, 4320 Aerotech Center Way New Item: (05/04)
Paso Robles, CA 93447 PAGE 1 OF 2
Telephone: (800) 350-2223 Fax: (805) 238-4201 Page Rev. Date: 08-12-08
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.
KIT CONSISTS OF:
No. Qty Part No. Description
1. 1 51-6409 ADAPTER SPACER w/ VSS
2. 1 300619 GM VEHICLE SPEED SENSOR (TORQUE SENSOR TO 20 IN./LBS.)
3. 1 300623 RELUCTOR RING MODIFIED
4. 6 723766 3/8"-16 x 2" S.H.C.S. (FOR BOLTING THE 51-6409 TO THE ATLAS)
GM 4L80E 4 SPEED AUTOMATIC OVERDRIVE- BACKGROUND INFORMATION
The GM 4L80E has a case length of 26" and has 17 bolts for retaining the oil pan. The rear side of the transmission case
will have a hex shaped bolt pattern that uses 6 bolts. There are several different lengths of output shafts that the
transmission has been equipped with, but
THIS KIT REQUIRES A 4WD OUTPUT SHAFT
.
The 4L80E transmission is normally equipped with an internal reluctor ring on both the transmissions input shaft and
output shaft. The computer needs both of these readings for the proper shifting and operation of this transmission. The
rear reluctor ring is not always installed into the transmission. The basic rule of thumb is 4WD transmissions 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. Since it is expensive to disassemble the transmission to add a reluctor ring,
this kit has a vehicle speed sensor built in that can be used in place of the 4L80E Output Shaft Speed Sensor.
Note:
The information on years and models of the 4L80E transmission mentioned in the above section is obtained
from various sources. You should always verify what your transmission is equipped with before beginning a conversion
with the 4L80E transmission.
INSTALLATION This kit is intended to be installed on an Atlas transfer case before leaving Advance Adapters.
If you have ordered this kit at a later date than your Atlas transfer case, than you will be required to do some
disassembly to the Atlas. The front input must be removed from the Atlas in order to press on the reluctor ring.
See pages 49 & 50 of the Atlas manual for the removal of the front input. Failure to remove the front input prior
to pressing the reluctor ring will cause transfer case failure.
1. Bolt the 51-6408 casting to the rear of the 4L80E using the stock fasteners. Torque to 25 ft./lbs.
2. Determine the correct transfer case rotation for your application and then bolt the 51-6409 casting to the Atlas.
3. The sensor needs to be installed into the 51-6409 casting. Using a feeler gage, check the clearance between the sensor
tip and top of the teeth on the reluctor ring. This clearance should be 0.012" +/- 0.002". This clearance may be adjusted
slightly by adjusting torque used to snug the sensor.
The transmission will not shift correctly if this tolerance is not
correct. Then bolt the 51-6409 casting to the Atlas transfer case.
4. Thread the 6 studs (included with your transfer case) completely into the 51-6409 casting.
5. You are now ready to bolt the transfer case (51-6409) casting to the 4L80E (51-6408) casting. When assembling
these components, make sure that the 4L80E output shaft and the Atlas input shaft do not bottom out.
DO NOT
FORCE THE ADAPTERS TOGETHER. If assistance is needed, please feel free to call the phone number listed
above. Once the two adapters and completely engaged, use the 6-3/8" serrated nuts (included with your transfer case)
to tighten the adapters together.
GM 4L80E AUTOMATIC TO
ATLAS 2 SPEED TRANSFER CASE