Zumbrota Drivetrain

Spartan Locker for AMC Model 20

$719.89

SKU: SL M20-29

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The Spartan Locker is a mechanical differential locker designed for AMC Model 20 applications with 29 spline axles. Manufactured by USA Standard Gear, this locker offers a reliable 100% lockup solution for improved traction in demanding conditions. It is constructed from durable 9310 steel, providing added strength and longevity. This Spartan Locker replaces the standard spider gears within the carrier case, delivering a robust locking mechanism. It comes complete with a heavy-duty cross pin shaft for enhanced durability. The product is identified by the part number SL M20-29 and is a component of the Zumbrota Drivetrain catalog.

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

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandZumbrota Drivetrain
Part NumberSL M20-29
CategoryDrivetrain

We’re here — turning wrenches, just like you.

Call us, follow along, or come say hi.

(760) 282-4645 Instagram Google

Buy with Confidence

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.

View Full Return Policy

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.

View Full Shipping Policy