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Drivetrain› Differentials and Rear-End Components

Strange Engineering

Strange Engineering Ultra Case 3.812" Differential Case

$1,660.00 $1,618.49 Save $41.51

SKU: P-3812ST

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

Moderate — 2–4 hours

Overview

The Strange Engineering Ultra Case is a differential case designed for Ford 9-inch rearends. Constructed from aluminum, it features a 3.812-inch diameter bearing bore and includes essential components such as a pinion support body, bearings, seals, and premium ring gear bolts. This case is designed for applications requiring larger-than-OEM components and is sold individually. The package is intended to help build a robust third member assembly for performance-oriented vehicles.
Show original supplier description
The Strange Engineering Ultra Case is a differential case designed for Ford 9-inch rearends. Constructed from aluminum, it features a 3.812-inch diameter bearing bore and includes essential components such as a pinion support body, bearings, seals, and premium ring gear bolts. This case is designed for applications requiring larger-than-OEM components and is sold individually. The package is intended to help build a robust third member assembly for performance-oriented vehicles.

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

BrandStrange Engineering
Part NumberP-3812ST
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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