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Drivetrain› 4x4 Driveline Components

Advance Adapters, Inc

ADVANCE ADAPTERS OVERDRIVE M3326-3SP

$1,264.00 $1,232.00 Save $32.00

SKU: A01D 915670

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

This all-range overdrive unit provides 25% overdrive, adding needed gearing for early model Jeeps (1940-1971) and I.H. Scouts (1961-1965) equipped with the Model 18 transfer case. It is a fully synchronized unit that can be shifted-on-the-fly. Minor floorboard modifications are required for the shifter. The Saturn overdrive can handle up to 300 ft./lbs. of torque. Advance Adapters acquired the tooling and intellectual property from Warn Industries in 1991, and current components are interchangeable with original Warn overdrive units (not compatible with Husky unit). It installs directly on the backside of the transfer case through the inspection cover, requiring no cutting, drivetrain modification, relays, or electrical connections.
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ADVANCE ADAPTERS OVERDRIVE M3326-3SP

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandAdvance Adapters, Inc
Part NumberA01D 915670

Videos

Saturn Overdrive Installation Info

Saturn Overdrive Installation Info
Saturn / Warn overdrive install Cj2A

Saturn / Warn overdrive install Cj2A
Willys Jeep How To: Saturn Overdrive Install

Willys Jeep How To: Saturn Overdrive Install
Willys Jeep 4 Speed Swap: Installing A Warn Overdrive!

Willys Jeep 4 Speed Swap: Installing A Warn Overdrive!

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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