Drivetrain Automatic Transmissions and Components

Trans Go Performance

A340/341/343/AW4 Reprogramming Kit

$112.00

SKU: T09L 340-HD2

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The TransGo Performance 340-HD2 is a transmission reprogramming kit designed for specific automatic transmissions. It recalibrates accumulators, feed orifices, and pressure regulation. This kit increases clutch plate durability and produces short, firm shifts.

It includes an optional low-hold 1-2 shift valve and a USA-made hardened steel TCC relay boost valve and bushing. This boost valve and bushing assembly is a durable replacement for soft aluminum OEM parts that are prone to wear. The kit can be installed with the transmission in the vehicle.
Show original supplier description

Part #: 340-HD2

This TransGo Reprogramming Kit comes with everything you need to recalibrate the accumulators, feed orifices as well as pressure regulation for street, strip and off road. The resulting increases clutch plate durability and produces short-firm shifts that are perfect for hot rods as well as work trucks. In addition, when using the included optional low hold 1-2 shift valve, the transmission will stay in low gear with lever in manual low position.

Features:

  • Innovative Recalibrations: This kit recalibrates accumulators, feed orifices, and pressure regulation, enhancing clutch plate durability and delivering short-firm shifts ideal for street, strip, and off-road driving.
  • Enhanced Transmission Performance: Includes an optional low hold 1-2 shift valve, ensuring the transmission remains in low gear with the lever in manual low position, optimizing performance for various driving conditions.
  • Durable Replacement Components: Features a drop-in hardened steel TCC relay boost valve and bushing, restoring hydraulic circuit integrity and replacing the soft aluminum OEM assembly prone to wear.

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

BrandTrans Go Performance
Part NumberT09L 340-HD2

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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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