Drivetrain› Automatic Transmissions and Components

Circle D Specialties

11" HP Series Torque Converter

$899.00

SKU: 31-08-19-1A

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Overview

The Circle D Specialties Ford 11" HP Series 4R100/E4OD Torque Converter is a custom-manufactured product designed for enhanced performance. It features a billet front cover, a new 3-disk Luk clutch pack, and furnace-brazed pump and turbine.

This torque converter also includes Torrington bearings on all three thrust surfaces and 4140 heat-treated input splines. It is available with 4 or 6 lug options to suit either E4OD or 4R100 transmissions and features a flanged style impeller hub.
Show original supplier description
The Circle D Specialties Ford 11" HP Series 4R100/E4OD Torque Converter is a high-performance upgrade meticulously custom-manufactured for Ford vehicles equipped with the 4R100 or E4OD transmissions. Constructed with premium components, this torque converter boasts a robust billet front cover for increased durability. It integrates a new 3-disk Luk clutch pack and features a furnace-brazed pump and turbine assembly, ensuring efficient power transfer and longevity under demanding conditions. Furthermore, Torrington bearings are utilized on all three thrust surfaces to minimize friction and wear, while the 4140 heat-treated input splines provide exceptional strength. The converter is offered with either a 4-lug or 6-lug option, specifically designed to match the bolt pattern of E4OD or 4R100 transmissions, and includes a flanged style impeller hub for secure mounting. This is a custom-manufactured product with an estimated production lead time of 4-6 weeks. Please note that specific bolt pattern options, including 4R100 (6x11.375") and E4OD (4x11.375"), are available for selection.

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

BrandCircle D Specialties
Part Number31-08-19-1A
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.

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