Advance Adapters 50-7506 User Manual

ADV ANCE ADAPTERS INC. P/N: 50-7506

P.O. Box 247, 4320 Aerotech Center Way New Item: (12/94)
Paso Robles, CA 93447 PAGE 1 OF 3
Telephone: [phone] Fax: [phone] Page Rev. Date: 01-16-01

B/W T98 4-SPD TRANS. TO JEEP NP231 T/C

(21 SLINES) REPLACING PEUGEOT TRANS.

KIT CONSISTS OF:

No. Qty Part No. Description

1. 1 51-7502 ADAPTER CASTING

2. 1 52-7506 T98 MAIN SHAFT WITH 21 SPLINES

3. 1 716452 SNAP RING (Jeep #8132631)

4. 1 716517 GASKET (Dana 300)

5. 1 716722 SEAL (NAT # 472319)

6. 1 716738 SEAL (NAT # 473459)

6. 2 723723 H.H.C.S. 3/8"-16 x 1-1/2"

7. 2 723728 S.H.C.S. 3/8"-16 x 2-1/2"

8. 2 723735 FLAT WASHER 3/8" STD.

9. 2 724328 H.H.C.S. 7/16"-14 x 1-1/4"

10. 1 JP001 JEEP INSTRUCTION MANUAL

WARNER T98 4 SPEED 1966 & UP:

The T98 transmission can be identified by a case length of 11-7/8". The shift cover has a casting number of 13-01 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 bolts.

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 & T5 transmissions.

This adapter is designed to fit the Jeep version of the T98 4-speed. The difference between the Jeep and the Ford T98
is the bolt patterns on both the front and back of the 4-speed. The main shafts are identical. The casting in this kit for
the Jeep T98 is the same as we use in the Ford T98, except it is machined differently for your transmission. The Jeep
T98 uses a 6 hole bolt pattern on the back of the transmission. We have attempted to utilize as many of the stock holes
as possible to fasten this adapter casting to your 4-speed. However, the lower two holes are not accessible to use with
our adapter housing. Therefore, some machining is required on your 4-speed transmission in order to use this adapter.

Before you begin to assemble your transmission, you must make sure that you have received the correct main shaft.
new shaft furnished with this kit must be carefully compared to the original shaft removed from your transmission.
spline on the end of the shaft must have 21 teeth. We manufacture two different T98 main shafts and it is possible that
you could receive the 27 or 23 spline in error.

While the main shaft is still in your transmission, set the A/A transfer case adapter onto the back of your transmission.
The adapter should index onto the rear output shaft bearing. This will align the adapter to your transmission. Install the
top two fasteners from the adapter to the T98 to make sure the rotation is correct. The purpose of this is to locate a position
for the new holes that need to be drilled into your Jeep T98. With the casting fastened to the T98, use either a marking
pen or a metal scribe to mark the center of the lower two holes using the casting as a template.

The
The

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.

ADV ANCE ADAPTERS INC. P/N: 50-7506

P.O. Box 247, 4320 Aerotech Center Way New Item: (12/94)
Paso Robles, CA 93447 PAGE 2 OF 3
Telephone: [phone] Fax: [phone] Page Rev. Date: 12-1 1-00

B/W T98 4-SPD TRANS. TO JEEP NP231 T/C

(21 SPLINES) REPLACING PEUGEOT TRANS.

Once the holes are marked, remove the casting and remove the main shaft out of the transmission. Using a drill press or
a mill, drill and tap the two holes marked on your T98 transmission, 3/8"-16 is recommended. Care should be taken

to keep the inside of the case as clean as possible from chips of metal and dirt.

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. 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. Install the new main shaft and gear
assembly into the Jeep T98 case.

The new seal provided with the adapter kit must be installed with the open side towards the transmission. The casting will
need to be installed on the T98. Use a small bead of RTV Blue Silicon on the backside of your transmission. Locate the
adapter onto the back bearing for indexing. Install the top two and new bottom two bolts and tighten. Insert the two socket
head bolts into the middle two holes and tighten. NOTE: The two socket head bolts will protrude slightly into the

inside of the transmission case. Make sure they don't interfere with the gear. Shorten bolts if necessary.

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 drive shaft.

When this transmission is going to be used with an AMC 6 cylinder or V8 engine, you must use Jeep bellhousing No.
8133951, and Advance Adapters pilot bushing P/N 716156. The clutch disc should be changed to a 10 1/2", Centerforce
No. 384180.

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.