Social

Saturn & Warn-OD : Saturn & Warn Overdrive for Dana 18 Transfer Cases (#Saturn-OD)

Saturn & Warn-OD : Saturn & Warn Overdrive for Dana 18 Transfer Cases

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

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.

Current Average Estimated Wait Time for New Orders
2 to 3 Weeks

915670_WEB.jpg

This all-range overdrive is a great addition to any of the early model Jeeps from 1940 to 1971, and I.H. Scouts 1961-65 with the Model 18 transfer case. The addition of this 25% overdrive unit offers you the needed gearing that 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. If a low gear set is purchased, we have available a Saturn overdrive less the bowl gear.

The Saturn is the original unit designed and developed by Warn Industries. Advance Adapters purchased the tooling, engineering data, and inventory from Warn 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.)

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 PN915670 26T x 6 spline M38, M38-A1, CJ2A, CJ3A, some CJ3B, 4-63 4X4, 4-73 4X4

PN915672 29T x 6 spline CJ5, CJ5A, CJ6, CJ6A,4-74 4X4, some CJ3B, 6-266, 6-230

PN915674 29T X 10 spline (T14 trans) CJ5, CJ5A, CJ6, CJ6A PN915678 27T X 6 spline PN915676 31T X 10 spline (Mitsubishi Jeep only) PN915677 6 spline overdrive (minus the bowl gear) designed for the Tera Low & Jack O’Brien low gear sets. ($738.71)

SHIFTER APPLICATION: Shifters are sold separately. Part # Description PN920000 T90 Dual Handle T/C PN920001 T90 Single Handle T/C PN920003 Universal Saturn Shifter PN920013 T14 Shifter

Saturn Overdrive information saturn

Saturn Parts Diagram

SATURN PARTS LIST:

PARTQTYDESCRIPTION

NO.REQ.

PN9110431HEX NUT

PN9110672BRASS SYNCHRO-RING

PN9110693SYNCHRO DOG

PN9110713SYNCHRO SPRING

PN9110781SHIFTER SLIDER RING

PN9110904PIN, PLANETARY GEAR

PN9110912NEEDLE BEARING

PN911092126-TOOTH GEAR

PN911093129-TOOTH GEAR

PN9110942THRUST RACE

PN9110951THRUST WASHER

PN911096131-TOOTH GEAR

PN911097127-TOOTH GEAR

PN9110981TERA LOW BOWL GEAR

PN9110992NEEDLE BEARING

PN9111002THRUST WASHER

PN9111031SHIFTER FORK

PN9111051SPRING, SHIFT DETENT

PN9111061SHIFT DETENT BALL

PN9111071SHIFT RAIL SEAL NEW STYLE

PN9111081SHIFT RAIL O-RING SEAL

PN9111091SPACER WASHER

PN9111301GASKET CASE

PN9111311GASKET BODY

PN9111331OIL SCOOP

PN9111371O-RING

PN9111431NEEDLE BEARING

PN9111472RETAINER RING SUN GEAR BEARING

PN9112361SPECIAL SNAP RING

PN9113131ROLLER BEARING

PN9113164THRUST WASHER

PN9113261BEARING CAP

PN9113281CASE COVER

PN91133016 SPLINE SHAFT

PN9113341SPACER WASHER

PN9113361GASKET CAP

PN9113371STATIONARY MEMBER

PN911338414-TOOTH GEAR

PN9113418THRUST WASHER

PN9113428NEEDLE BEARING STRIP

PN9113461DRIVE MEMBER

PN9117311DRIVE NUT

PN911731-S1SPECIAL METRIC DRIVE NUT

PN9118061LOCKWASHER

PN9118381RETAINER RING

PN9123881ROLL PIN

PN9132961SHIFTER SHAFT

PN9132971SHIFTER GUIDE PIN

PN9142312SOCKET HEAD SCREWS 6-32 X 1/4

PN9142321PLANET HUB ONLY-6 SPLINE

PN9143841PLANET HUB ONLY-10 SPLINE (T14)

PN914384-S1PLANET HUB ONLY SPECIAL 10 SPL.

PN9148621CAP SCREW SHIFTER

PN9151321COTTER PIN

PN9152041SATURN CASE

PN9167791SNAP RING/PLAN HUB

PN9198661RETAINING RING PLANET PINS

PN9198691RING OIL SLINGER

COMPONENT ASSEMBLY KITS

PN911349SEAL AND GASKET KIT

KIT INCLUDES ALL GASKET SEALS & SEAL WASHERS

PN912821THRUST BEARING KIT

KIT INCLUDES: (2) 911099, (2) 911094, (2) 911100

PN9189634-PC PLANETARY GEAR SETS

KIT INCLUDES: (8) 911341, (8) 911342, (4) 911316, (4) 911090, (4) 911338,

PN911362SPLINED SHAFT KIT

KIT INCLUDES:(1) 911043, (1) 915132, (1) 911143, (1) 911147, (1) 911330

PN911317SYNCHRO RING SERVICE KIT

KIT INCLUDES:(2) 911067, (3) 911069, (3) 911071

PN911318SYNCHRO ASSEMBLY KIT

KIT INCLUDES:(2) 911067, (3) 911069, (3) 911071, (1) 911078, (1) 911346

PN91122326 TOOTH PLANETARY HSG. KIT

KIT INCLUDES:(1) 911092, (2) 911091, (1) 919869

PN91122429 TOOTH PLANETARY HSG. KIT

KIT INCLUDES:(1) 911093, (2) 911091,(1) 919869

PN911837PLANETARY ASSEMBLY (6 SPL.)

KIT INCLUDES:(1) 914232, (4) 911090, (1) 911095, (1) 911137, (4) 911316, (4) 911338, (8) 911341, (8) 911342, (1) 911731, (2) 919866, (1) 916779, (1) 911143

PN911839 -PLANETARY ASSY. (T14 10 SPL.)

KIT INCLUDES:(1) 914384, (4) 911090, (1) 911095, (1) 911137, (4) 911316, (4) 911338, (8) 911341, (8) 911342, (1) 911731, (2) 919866, (1) 916779, (1) 911143

PN911840 - PLANETARY ASSY. (METRIC 10 SPL.)

KIT INCLUDES:(1) 914384-S, (4) 911090, (1) 911095, (1) 911137, (4) 911316, (4) 911338, (8) 911341, (8) 911342, (1) 911731, (2) 919866, (1) 916779, (1) 911143

Related Products

Top Review

5/5

by Desert Rat, from Switzerland

A Great Overdrive

I have had the Saturn (Warn) overdrive on four of my Jeep CJ5s over a 30 year period, two of which I still own. I recommend them highly.

Among other things, it makes highway driving far more bearable, cuts down on the noise, and you get a modest increase in highway mileage.

The overdrive is very easy to install, just remove the plate on the back of the transfer case, remove the cotter pin from the end of transmission shaft, pull the drive gear off, thread the planetary unit on, torque it up, get the star lock washer on, then bolt on the rest of the unit. The shifter bolts to the top of the transmission and the linkage is a simple rod. You can modify the bracket and linkage as needed. Probably have to cut the floor.

The quality of the unit was equal to the gears in the transmission, nice brass synchros, very well made. One of my Jeeps (overdrive bolted to a T-18 4-speed) had an occasional gear clash problem when shifting, possibly main shaft end play or lousy bearing or something,

Pity the Spicer 18 transfer case is a dying breed, though the Saturn overdrive compliments it nicely.

1273 of 2456 people found the following review helpful.

Did you find this review helpful?    Yes  |  No

 

Subscribe to our newsletter to stay up to date with the latest news and happenings.