Zumbrota Drivetrain

SM465 Mainshaft Locknut Washer

$16.89

SKU: ZM465335366

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

Description

The USA Standard Gear Manual Transmission CH465 GM Mainshaft Locknut Washer (ZM465335366) is an essential component for maintaining the integrity of your GM CH465 or Muncie SM465 manual transmission. Crafted from durable alloy steel with a machined finish, this washer plays a crucial role in the proper functioning and endplay standardization of the transmission's mainshaft. The Muncie SM465 transmission is renowned for its strength and reliability, making it a popular choice for various applications, including heavy-duty use and custom builds. This locknut washer is a key part of the internal workings, contributing to the overall stability and performance of the gearbox. Proper installation of this component is vital for ensuring the transmission operates as intended and to prevent premature wear or failure. While this product page notes "No fitment data" specific to vehicles, it is explicitly designed for GM CH465 and Muncie SM465 manual transmissions. It is important to verify compatibility with your specific transmission model. The product also includes a California Proposition 65 warning, as is standard for many automotive parts sold in California.

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

BrandZumbrota Drivetrain
Part NumberZM465335366
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.

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