Specifications

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saturn overdrive
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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
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
if the 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.
SHIFTER APPLICATION:
(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
T
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
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
Jeep Dana 18 & 20 Upgrade section for more information on low gear sets). 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. 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 interchange-
able 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.