Advance Adapters 50-1400 User Manual

ADVANCE ADAPTERS INC. P/N: 50-1400

P.O. Box 247, 4320 Aerotech Center Way Old Part No: 711014
Paso Robles, CA 93447 PAGE 1 OF 3
Telephone: [phone] Fax: [phone] Page Rev. Date: 06-06-14

TURBO 400 TO JEEP VEHICLES

DANA 18/20 TRANSFER CASE

KIT CONSISTS OF:

No. Qty Part No. Description

1. 1 51-0600 ADAPTER CASTING (Ref: 711106)

2. 1 52-1300 SPUD SHAFT (6-Splines)(Ref: 711313)

3. 1 *52-1401 29TH x 6SPL. 2.46: INPUT GEAR

4. 1 52-3200 OUTPUT SHAFT (Ref: 711332)

5. 1 716308 BEARING (#6209)

6. 1 716450 SNAP RING (GM #378-5205)

7. 1 716510 GASKET (GM #862-4709)

8. 1 716568 GASKET

9. 1 716707 SEAL (NAT. #472144)

10. 6 723701 HEX NUT

11. 11 723704 3/8" LOCKWASHER

12. 6 723711 3/8"-16 x 2" STUD BOLTS

13. 5 723723 3/8"-16 x 1-1/2" H.H.C.S. (T/C BOLTS)

14. 1 728701 NYLON LOCK NUT

*20 Degree pressure angle gear:
Model 18 transfer cases with 2.46:1,
w/ T14 transmission, 1 ¼” intermediate shaft

CJ with Buck V6 (68-71)

Drive gear# 18-8-50 (947382) ---29 tooth x 10 spline
Intermediate Gear # 18-5-9 (809293) ---39 tooth x 18 tooth
**Requires AA part # 52-1401
18-8-23 (809297) ----29 tooth x 6 spline (SUPPLIED IN KIT)

OPTIONAL ITEMS:

Qty Part No. Description

1 716003 CROSSMEMBER
1 716302 SEALED BEARING
1 716001 (T86) LARGE HOLE OR
1 716002 (T90) SMALL HOLE

BEARING RETAINER

NOTE: Two TH400 bolt patterns have been drilled

into this housing; one is for a GM TH400 and the
other is rotated for the AMC TH400.

17 Degree pressure angle gear:
Model 18 transfer cases with 2.03:1,
w/ T14 transmission, 1 ¼” intermediate shaft

Jeepster/CJ (67-74) models 18/20

Drive gear# 18-8-49 (947339) ---26thx10sp.
Intermediate Gear# 18-5-16(946786) 34thx20th

(Special order gear)

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: 50-1400

P.O. Box 247, 4320 Aerotech Center Way Old Part No: 711014
Paso Robles, CA 93447 PAGE 2 OF 3
Telephone: [phone] Fax: [phone] Page Rev. Date: 06-06-14

TURBO 400 TO JEEP VEHICLES

DANA 18/20 TRANSFER CASE

GM TURBO 400 3 SPEED AUTOMATIC

The GM TH400 has a case length of 24-1/4", 13 bolts for holding the oil pan in position and is available in 3 different engine
to transmission bolt patterns. Make sure you have selected the proper TH400 for your particular engine. The AMC TH400
case when used with the Chevy engine, will require adapter Kit No. 716133. The rear side of the transmission case will
have a hex shaped bolt pattern that uses 6 bolts. There are several various lengths of output shafts that the transmission
has been equipped with, and all of the new Advance Adapters output shafts will be interchangeable with your transmission.
The new shaft supplied with your kit should be installed by a competent mechanic The speedometer gear is normally located
in the tailhousing, but when adapting it to the transfer case, the location will change to the backside of the transfer case.
The rear transmission support will now be located on the new adapter housing or, in some cases, on the transfer case.

ASSEMBLY PROCEDURES:

1) Verify that you have the correct input gear for your transfer case. We have supplied the gear that is the most common
applicationin this kit. Refer to page one for gear identification.

1A) Press the bearing, P/N 716308, onto the female side of the spud shaft (P/N 52-1300).
2 ) Secure the bearing in place with the snap ring, P/N 716450.
3 ) Install the oil seal into the adapter housing. Install the seal from the transfer case side of the adapter housing. The seal should

be pressed approximately 1/2". (See Page 3).

4) Install the spud shaft and bearing into the adapter housing. Install this assembly from the transmission side of the adapter.
Press on the outer race of the bearing when installing.

5 ) Install the TH400 shaft into the TH400 transmission. Note: We manufacture numerous shafts, so please verify that this shaft

has the correct splines and that it fits to the female portion of the spud shaft that you also received in this kit.

6) Using the stud bolts provided, install and Loctite the studs into your transmission.

7) Install the gasket and adapter housing to your transmission. Make sure the adapter goes up flush to the transmission.

8) Use the lock washers and nuts to secure the adapter to the transmission. DO NOT SUCK UP THE ADAPTER TO YOUR

TRANSMISSION WITH THESE LOCK WASHERS AND NUTS.

9) Using the proper index retainer and bearing for your transfer case, install them on the adapter housing.

1 0) We have included a new gasket when bolting your transmission to your transfer case. This gasket in a multi-pattern universal

gasket designed for a few transfer cases. For this Jeep adapter, the gasket must be slightly rotated to line up all the holes.

1 1) It is also recommended that you use a gasket sealer or R.T.V. Blue silicone to prevent any leaking.

12) Install the 3/8"-16 bolts to secure the transfer case to the transmission.

.

On most installations, a slight pan modification may be required for clearance of the front Universal yoke. On early model
Jeeps up to 1965, it may be necessary to change the yoke style to the smaller design. In order to allow for additional front
driveline clearance, we recommend that the engine and transfer case be offset to the driver's side on vehicles having front
driveshafts located on the passenger side. On Jeep conversions this can be approximately 1" offset of centerline.

If you have selected a transmission that has the old style modulator, then we recommend the use of the Advance Adapters
adjustable modulator, Part No. 716010. This will also allow for additional driveshaft clearance.

All installations will require the use of a transmission cooler. The cooler can be either installed in the radiator or a remote
location is acceptable. The transmission shift control can either be a Hurst floor mounted type shifter, or sometimes the
existing column shift can be modified on certain applications.

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.