Advance

Atlas Transfer Case 3/4" Spacer/Rotation Ring

$104.02

SKU: AS-8603

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The Advance Adapters AS-8603 is a 3/4-inch spacer and rotation ring engineered for Atlas transfer case installations. Many transmissions feature a 'stick out' on their output shafts, which can cause a bottoming-out issue when an Atlas transfer case is installed. In situations where trimming the output shaft is not practical or possible due to a lack of sufficient splines, this spacer provides a solution. Constructed from aluminum, this spacer measures 3/4" in thickness. It functions by creating additional clearance, ensuring proper installation and alignment between the transmission and the Atlas transfer case. The AS-8603 is a key component for custom drivetrain builds and swaps where precise fitment is critical. Included with the spacer are necessary mounting bolts (3/8" -16 X 1.00" SHCS ZINC). Test fitting the ring to both the transmission and the Atlas transfer case is recommended to ensure proper alignment with all mounting holes.

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
Part NumberAS-8603
CategoryDrivetrain
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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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