Drivetrain› Automatic Transmissions and Components

Circle D Specialties

4L60 HP Series 300mm Torque Converter

$859.00

SKU: 01N-09-09-3D

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

Moderate — 2–4 hours

Overview

The Circle D Specialties 4L60 HP Series torque converter is a performance upgrade for 4L60E transmissions. It features a 300mm diameter and a stall speed of 2800-3000 RPM, making it suitable for daily driver vehicles seeking enhanced performance.
Show original supplier description
The Circle D Specialties 4L60 HP Series 300MM Single 3D torque converter is engineered for 4L60E transmissions, offering a performance-oriented upgrade for daily driver vehicles. With a 300mm (12-inch) diameter and a stall speed range of 2800-3000 RPM, this converter provides a noticeable increase in stall capability while maintaining 99% stock driving characteristics under light throttle. Constructed for durability and performance, this torque converter features a billet front cover, hand TIG welding, a high carbon spun wound lock-up clutch lining, and heavy-duty Torrington bearings. These components ensure reliable operation and efficient power transfer for demanding applications. This torque converter is designed for use with 4L60E transmissions. Circle D Specialties emphasizes that proper stall speed selection is critical for optimal performance and drivability. Customers are encouraged to contact them to confirm compatibility with their specific vehicle and driveline combination. The build time for this custom-manufactured product is typically 4-6 weeks.

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

BrandCircle D Specialties
Part Number01N-09-09-3D
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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