Drivetrain› Differentials and Rear-End Components

Moser Engineering

31-Spline C-Clip Axles

$499.00

SKU: A31-71MUST

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Moser Engineering A31-71MUST is a pair of 31-spline C-clip axles designed for Ford Mustang models from 1971-1973.

Each axle is 100% magnafluxed to ensure quality and features non-tapered design with hardened bearing seats that fit OEM applications. This product is specifically made for the Ford 9-inch rear end.
Show original supplier description
The Moser Engineering 31 Spline C-Clip Axles, part number A31-71MUST, are engineered to enhance the strength and performance of your 1971-1973 Ford Mustang. They undergo an induction heat-treatment process to optimize torsional strength and are then 100% magnafluxed to guarantee their integrity. The design features non-tapered shafts with hardened bearing seats, ensuring a precise fit for OEM applications. This specific set is designed for the Ford 9-inch rear end and includes 31 splines. The Moser Engineering A31-71MUST axles are compatible with the 1971, 1972, and 1973 Ford Mustang models.

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

BrandMoser Engineering
Part NumberA31-71MUST
CategoryDrivetrain
5,000+ Trusted brands
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(760) 282-4645 hello@motormia.co

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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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