Advance Adapters 712569 - Manual (Page 2)

BELLHOUSING FOR JEEP 4.0 HIGH OUTPUT
6 CYLINDER ENG. TO T150, T176, T5, T18 & T4
ADVANCE ADAPTERS INC. P/N: 712569
P.O. Box 247, 4320 Aerotech Center Way
Paso Robles, CA 93447
PAGE 2 OF 6
Telephone: (800) 350-2223 Fax: (805) 238-4201 Page Rev. Date: 07-16-13
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:
Depending on the year of the vehicle that you are dealing with, you will need to vary the clutch control requirements
accordingly. The bellhousing that Advance Adapters has manufactured will use a GM clutch release arm along with
a special Centerforce clutch release bearing #N1714. Test fit the new bearing on the new GM release arm. It may be
necessary to file or grind the lugs of the new arm slightly in order to fit into the groove of the new bearing. The new
GM clutch arm will have an internal snap ring to lock onto the ball pivot stud inside the new bellhousing. On Jeep vehicles
that were originally equipped with a mechanical clutch control, you should not have any problem adapting your original
clutch linkage to the new clutch arm. On Jeep vehicles that were previously equipped with a hydraulic slave cylinder
such as 1987-2005 and 1980-1986 four cylinders, you will need to use a Jeep slave cylinder that was used in the 1980-
1983 Iron Duke four cylinder Jeep vehicles. We offer this slave cylinder kit as Part No. 716331. This new assembly
will include all the necessary parts to mount to the new bellhousing.
The bellhousing is a direct duplicate of the original AMC stock bellhousing. The flywheel sensor, dowel pin holes and
dust cover mounting holes are all in the original location. The original dust cover or block plate must be retained for
use with the Advance Adapter bellhousing. This plate is normally already on the engine block. When using the hydraulic
clutch slave cylinder kit (P/N 716331), you will need to make a small cut out in the dust cover in order for the slave
cylinder to be installed. Refer to the diagrams on the following pages for the exact cut out location. The flywheel sensor
must be installed onto the new bellhousing using the original bolts or new bolts that we have supplied. These special
bolts provide the necessary accuracy to mount the sensor in the appropriate location.
Prior to assembling the bellhousing onto the engine, you will need to install the clutch ball pivot. We have provided two
(2) different locations depending on the year of the vehicle that the bellhousing is being installed into. The upper location
will be for Wrangler hydraulic clutch controls, while of the lower location will be for mechanical clutch type controls.
Refer to Page 6 for additional information.
If you are using this bellhousing on a Jeep vehicle equipped with a Dana 300 or Dana 20 transfer case, you will need
to modify the lower right portion of the bellhousing. The bolt area at the extreme bottom will need to be removed in
order for the front drive shaft to have the necessary clearance.
Depending on the transmission that you are using, you will need to vary both the pilot bushing and the clutch disc. The
original 4.0 engines were normally equipped with an AX15 5 speed transmission that had a 1-1/8"-10 spline clutch disc.
If you are using the T4, T5 or T176 transmissions, then the original clutch disc can be retained. If you are using a
T18 or T150 transmission, then you will need to change the disc to a Centerforce part number of 384180. Be sure to
select the proper pilot bearing for installation into the 4.0 crankshaft. It is advisable that you check the input shaft tip
engagement into the new pilot bearing after installation. On certain applications such as the T176 and T5 transmissions,
it may be necessary to shorten the input shaft length in order to avoid bottoming out of the input shaft into the engine
crank area.
DO NOT FORCE THE TRANSMISSION INTO POSITION. The flywheel must be 1" thick. We have
seen some flywheels up to 1.5" thick, which can cause interference problems. This 1" measurement should be taken
from the crank flange to the clutch disc surface. This bellhousing also requires the use of a diaphragm pressure plate.
Most Borg & Beck 3 finger pressure plates will not work.
CAUTION: On some of the early installations, we have encountered an interference problem between the clutch pressure
plate and clutch release arm. The solution is to grind the necessary clearance on the inside of the bellhousing and modify
the release lever approximately 1/16". It will be necessary for you to check the clutch clearance inside the bellhousing
prior to transmission assembly. This problem has only occurred with aftermarket clutch assemblies or thicker than normal
flywheels.