Advance Adapters SATURN User Manual

ADVANCE ADAPTERS INC. P/N: SATURN

P.O. Box 247, 4320 Aerotech Center Way
Paso Robles, CA 93447 PAGE 1 OF 10
Telephone: [phone] Fax: [phone] Page Rev . Date: 08-05-10

SA TURN OVERDRIVE ASSEMBL Y

KIT CONSISTS OF:

No. Qty Part No. Description

1. 1 GEAR ASSEMBLY (29 or 26 Tooth)

2. 1 HOUSING ASSEMBLY

3. 1 911806 SPECIAL TABBED LOCK WASHER

4. 1 911236 SPECIAL SNAP RING

5. 1 911137 BODY GASKET

6. 1 911133 OIL SCOOP

7. 5 911157 SEAL WASHERS

8. 5 911144 H.H.C.S. 3/8"-16 x 3-1/2" LG.

One of the most critical factors in performing a successful Saturn Overdrive installation, is the proper installation of the
tabbed washer and special snap ring. If these are not properly installed, the overdrive assembly can slip out of position
and cause gear damage that is not covered by warranty.

The second most important part of the installation is the proper alignment of the brass synchro ring onto the synchronizer
assembly. Advance Adapters has installed the brass ring onto the synchro assembly by use of some heavy wheel bearing
grease. This extra grease will maintain the proper location of the synchro ring while being installed onto the gear assembly.
If there are any questions as you are performing this installation, please do not hesitate to call the factory for assistance.

The third most important part of the installation the oil supply, The oil scoop is the only way oil is fed to the bearings in
the Saturn OD. We have seen units completely destroyed after just a 50 miles because the oil scoop was left off the unit.

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.

his all-range overdrive is a great addition to any of the early model Jeeps from 1940 to 1971, and I.H. Scouts 1961-65

T

with the Model 18 transfer case. The addition of this 25% overdrive unit offers you the needed gearing the early Jeeps were
lacking. The Saturn overdrive is a fully synchronized unit that can be shifted-on-the-fly. When installing the unit, only minor modifica­tions are required to the floorboard for the shifter. The Saturn is built to handle up to 300 ft./lbs. of torque, well within the range of a
stock V8. If you are interested in a lower gear set for your Dana 18 transfer case, but would like to retain your overdrive,

we offer a Saturn bowl gear that will work with the gear reduction kits currently on the market. (See the J eep Dana 18
& 20 Upgrade section for more information on low gear sets). If a lo w gear set is purchased, we have available a Saturn
overdrive less the bo wl gear.

The Saturn is the original unit designed and developed by Warn Industries. Soon after their introduction, another unit emerged in
Colorado by the name of Husky or Dual-A-Matic. The Colorado unit was identical in appearance, but in no way was it interchange­able with the Warn All-Range. Both units were available for the early Jeep and Scout vehicles. The units were offered with the 6 and
10 spline internal assembly and the 26 or 29 tooth output gear. Both units were very popular in the mid-1960s, but it wasn't until the
introduction of the Dana Spicer Model 20 transfer case in 1972 that production quantities started to recede. The Warn and Husky
overdrives were no longer compatible. Both companies stopped production, and the availability of spare parts became very scarce
by the mid-1970s.

Advance Adapters purchased the tooling, engineering data, & inventory from Warn Industries in 1991. The components we manu­facture today are the same as the old Warn components. We have incorporated a few upgrades on the units we sell today, but these
units are all still interchangeable with the original Warn overdrive. (Note: The Saturn is not compatible with the Husky unit.) The
Saturn overdrive installs directly on the backside of the transfer case through the inspection cover. No cutting or modification of the
drivetrain is required. No relays and electrical connections required.

SHIFTER APPLICATION:

APPLICATION INFORMATION:

To select the proper overdrive model, find your vehicle model and
transmission type listed below. The Saturn overdrive will only fit the
vehicles listed that have a Dana 18 transfer case.

Part # Description Vehicle Models

915670 26T x 6 spline M38, M38-A1, CJ2A, CJ3A,

some CJ3B, 4-63 4X4, 4-73 4X4

(Shifters are sold separately.)

Part # Description

920000 T90 Dual Handle T/C
920001 T90 Single Handle T/C
920003 Universal Saturn Shifter
920013 T14 Shifter

915672 29T x 6 spline CJ5, CJ5A, CJ6, CJ6A, 4-74 4X4,

some CJ3B, 6-266, 6-230

915674 29T X 10 spline (T14 trans) CJ5, CJ5A, CJ6, CJ6A
915676 31T X 10 spline (Mitsubishi Jeep only)
915677 6 spline overdrive (minus the bowl gear) designed

for the Tera Low & Jack O’Brien low gear sets.

915678 27T x 6 spline Some early Jeeps had a 27 thooth

drive gear.

SATURN OVERDRIVE ONE (1) YEAR LIMITED WARRANTY

The manufacturer warrants this product against material defects and faulty workmanship for a period of one (1) year from the time of shipment on
the Saturn Overdrive. We do not offer any type of labor allowance, and all warranty claims are subject to inspection by Advance Adapters. It is the
customers responsibility to return possible warranted parts to Advance Adapters. The customer will be refunded for shipping costs incurred
product is found faulty. We reserve the right to repair or replace any product. All returns must have a Return Goods Authorization Number
(RGA#). Please call 1-800-350-2223, and our sales department can assist you. Warranty is void if proper gear lubricates are not used, the proper
oil levels are not kept, the product has not been properly installed, and/or installation instructions have not been followed.

T op View

if the

* IMPROVES GAS MILEAGE

* ONE (1) YEAR WARRANTY

* NO DRIVELINE MODIFICATIONS

* REDUCES ENGINE RPM’s BY 25%

* INCREASES ENGINE & DRIVETRAIN LIFE

* CAN BE USED IN OVERDRIVE OR DIRECT

Benefits of the Saturn Overdrive: