Drivetrain› Drive Shafts and Components

DuraShaft®

4-Inch Aluminum Driveshaft Assembly, 70.25-Inch

$1,059.00

SKU: 916773-6412_HDALM4

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The 1990 GM 2wd aluminum H.D. driveshaft assembly is a custom-built component from Fort Wayne Clutch.

This assembly features a 70.25-inch approximate length, measured center to center of the universal joints. It is constructed with a 4-inch diameter, 0.125-inch thick heavy-duty aluminum tubing and includes a Sonna.X HD forged transmission slip yoke with 26/26 spline and 1.5-inch OD. The tube weld yokes are 1330 series, and the assembly is balanced.
Show original supplier description
The 1990 GM 2wd aluminum H.D. driveshaft assembly is a custom-built component designed for specific GM applications. This assembly offers a robust solution for drivetrain needs, featuring a 70.25-inch approximate length, measured center to center of the universal joints. Construction highlights include heavy-duty, 4-inch diameter by 0.125-inch thick aluminum tubing for a balance of strength and weight savings. It is equipped with a Sonna.X HD forged transmission slip yoke, featuring 26/26 spline and a 1.5-inch outside diameter. The assembly incorporates 1330 series Sonna.X HD machined aluminum tube weld yokes, which have a 3 5/8-inch span and 1 1/16-inch cap. For enhanced durability, it uses Spicer HD solid universal joints with 1330 x 3R specifications at the differential end, featuring a 1 1/8-inch cap and a 2.56-inch inside lockup C-clip style. This is a balanced assembly that is new and made by Fort Wayne Clutch. It is noted that this is a built-to-order assembly, and customers should allow for one additional day of lead time for its construction. The product is listed as available in stock.

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

BrandDuraShaft®
Part Number916773-6412_HDALM4
CategoryDrivetrain
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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.

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.

View Full Shipping Policy