Advance Adapters 50-7505 User Manual

ADVANCE ADAPTERS INC. P/N: 50-7505

P.O. Box 247, 4320 Aerotech Center Way New Item: (11/93)
Paso Robles, CA 93447 PAGE 1 OF 3
Telephone: [phone] Fax: [phone] Page Rev . Date: 08-07-08

FORD T18 4-SPEED TRANSMISSION TO

JEEP NP231 TRANSFER CASE-23 SPLINES

KIT CONSISTS OF:

No. Qty Part No. Description

1. 1 51-7500 ADAPTER CASTING (Ref: 711175)

2. 1 52-7501 T18 MAIN SHAFT
3 . 1 Pack 714202 BOLT PACK (50-7500)

4. 1 716452 SNAP RING (Jeep #8132631)

5. 1 716512 GASKET (NP435) (T18)

6. 1 716517 GASKET (Dana 300)

7. 1 716722 SEAL (National #472319)

8. 1 JP001 JEEP INSTRUCTION MANUAL

Before assembly of the transmission with the new
main shaft, you must verify that the correct shaft is
being used. Your spline count on the shaft must be
23-splines. Advance Adapters also manufactures a
27-spline shaft that will not be compatible with your
NP231 transfer case.

The T18 shafts had two main shaft
designs. The difference between the
shafts is the hub between the sec­ond and third gears (both designs are
interchangeable into the transmis­sion). Some shafts have a snap ring
and washer and others have the
spacer as part of the shaft. Most of
our shafts have the hub as part of
the main shaft. If you have the snap
ring design, just omit the washer and
snap ring when loading the gears on
the new main shaft.

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.

ADVANCE ADAPTERS INC. P/N: 50-7505

P.O. Box 247, 4320 Aerotech Center Way New Item: (11/93)
Paso Robles, CA 93447 PAGE 2 OF 3
Telephone: [phone] Fax: [phone] Page Rev . Date: 08-14-02

FORD T18 4-SPEED TRANSMISSION TO

JEEP NP231 TRANSFER CASE-23 SPLINES

WARNER T18 4 SPEED 1966 & UP:

The T18 & T19 transmission can be identified by a case length of 11-7/8", and a case casting number of T18 or 13-01, or T19
or 13-09. The P.T.O. opening is on the right hand side towards the front of the case and the shift cover is mounted to the top
of the case with six (6) bolts. The new shaft furnished with this kit must be carefully compared to the original shaft removed
from your transmission. The T18 & T19 transmissions required for this kit are from Ford 1/2, 3/4 and 1 ton trucks. The front
bolt pattern on the Ford transmissions will have an 8-1/2" x 6-1/4" bellhousing pattern with a bellhousing pilot diameter of 4.848".

The assembled length of the transmission and adapter will vary depending on which installation you are doing. On certain Jeep
applications, we have set the length up to be an exact replacement of the original T4 and T5 transmissions.

Before you begin to assemble your transmission, you must make sure that you have received the correct main shaft. The spline
on the end of the shaft must have 23 teeth. Since we manufacture two different T18 main shafts, it is possible that you could
receive the 27 spline shaft in error.

When assembling the gears onto the new main shaft, make sure that all gears have the proper end clearance required for oiling.
Make sure that all transmission assembly work is done by a competent mechanic. All surfaces must use gaskets to prevent
oil leakage. Warner Gear has used two different shaft designs for the spacer between second and third gear. Some
transmissions will use a snap ring and thrust washer, while others will use a built in shoulder. Both shafts are interchangeable.

When bolting the adapter to the main transmission case, you must use two studs in the upper two holes of the adapter. A slight
modification may be necessary to obtain the proper clearance around the lower idler shafts of the stock transmission.

The new seal provided with the adapter kit must be installed with the open side towards the transmission. With the adapter
and transmission assembled, you are now ready to bolt the transfer case into position. We have included a new gasket for added
protection. Be sure to use RTV Blue Silicone on both sides of the adapter & gasket.

The skid plate will need to be slightly modified to fit under the new transmission. Two new holes may be necessary for use
with the new adapter and a slight notch may be required on the front leading edge of the skid plate for clearance around the
front driveshaft.

When this transmission is going to be used with an AMC 6 cylinder or V8 engine, you must use Jeep bellhousing #8133951
and Advance Adapters pilot bushing #716156. The clutch disc should be changed to a 10-1/2" Centerforce, No. 384180. The
original T4 or T5 bellhousing can be retained by simply drilling and tapping the proper bolt pattern for the Ford transmission.
The original bellhousing will have pilot holes that were normally used for the T176 transmission that have the same exact location
as your new Ford T18 transmission.

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.