Description

Automatic Transmission Shift Kit – Reprogramming Kit – Gear Command – Piston / Separator Plate / Springs / Gaskets / Shims / Hardware – GM TH400 – Kit

Why Choose Us?



Frequently Asked Questions​

As an Authorized Automotive Retailer in the United States, we take pride in guaranteeing 100% authentic products from all brands available on our website. With partnerships spanning 1,000+ brands and a network of 20+ distributor warehouses nationwide, we maintain millions of auto parts in inventory across the USA, ensuring quick shipping and reliable service to our customers. When you shop with us, you're investing in quality and trust.
We believe we have the fastest backorder system in the U.S. auto parts industry, thanks to our strong partnerships with brands and vendors. Nearly all backordered auto parts are shipped directly by the vendors without any additional delays, or they are placed as special orders on the same day. In most cases, backordered parts are delivered within 5-10 days.
We offer unbeatable prices and the best shipping rates on auto parts, with exclusive protection and insurance included to safeguard your order from damage or loss. Enjoy convenient door-to-door delivery, real-time tracking, and our 100% satisfaction guarantee for a smooth, worry-free experience.
Our standard shipping typically takes 1-3 business days. We will provide estimated shipping time for each product. While we aim to deliver as quickly as possible, this timeframe ensures all orders are processed, prepared, and dispatched with care. If the products are not ready for shipping in 72 hours, we will refund you 100%
Absolutely. Once your order is dispatched, you’ll receive an email with tracking details, so you can follow your shipment every step of the way. Every step of shipping process will be sent through email notifications or using tracking page.
Every product page includes a stock level indicator to show what’s available. We always update the inventory 24/24. We’ll be happy to check availability and provide updates on new stock arrivals if you need a help.
We’re sorry to hear that your order wasn’t delivered in perfect condition. Please email us with your order number, a description of the issue, and photographs of the damaged item. Once we receive this information, we’ll arrange for a replacement or refund and handle the return process.
You can return items within 30 days of receipt. Ensure the product is new in its original packaging and securely wrapped for safe transit. Once we receive the item in sellable condition, we’ll issue a full refund for the product value. Contact us for the return address and further instructions.

About TRANSGO

From stock-type replacement parts to substantial performance upgrades, TransGo offers kits and components to make automatic transmissions shift better, handle more power, and improve reliability. TransGo produces shift kits, reprogramming kits, and specialty components designed to boost performance without sacrificing durability, with options to fit a wide range of manufacturers, including Chrysler, Ford, and GM.

International Shipping

Below are estimated rates and delivery times for popular destinations; full carrier options are available at checkout.

Our dedicated team has years of experience managing international logistics and customs documentation to ensure smooth delivery from our US warehouse to your door. Please review our shipping policy and local import regulations before ordering.

Loading international estimates...

Reviews

There are no reviews yet.

Be the first to review “TRANSGO Reprogramming Kit GM TH400 65-Up 400-PRO”

Your email address will not be published. Required fields are marked *

Recently viewed products

  • Add to wishlist
    Sale
    Placeholder
    Add to wishlist

    OPTITORQUE TECHNOLOGIES LLC SBC Main Stud Kit Large Journal 4-Bolt 10498

    SKU: OTT10498
    Product information
    Details...
    Original price was: $107.00.Current price is: $96.59.Add to cart
    Original price was: $107.00.Current price is: $96.59.
    Quantity Only 2 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    PERTRONIX IGNITION Ignitor III Conversion Kit 71181

    SKU: PRT71181
    Product information
    • Weight0.21 lbs
    • Dimensions6.15 × 4.85 × 1.7 in
    • Product Line

      Ignitor III

    • Trigger Method

      Magnetic

    • Voltage

      12V

    • Positive / Negative Ground

      Negative

    • Quantity

      Kit

    Details...
    Original price was: $255.00.Current price is: $231.68.Add to cart
    Original price was: $255.00.Current price is: $231.68.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    PAINLESS WIRING Oxygen Sensor Fitting 60406

    SKU: PWI60406
    Product information
    • Weight0.07 lbs
    • Dimensions4.25 × 2.75 × 0.85 in
    • Style

      Bung

    • Quantity

      Each

    • Material

      Steel

    • Color

      Natural

    • Finish

      Natural

    Details...
    Original price was: $11.99.Current price is: $9.99.Add to cart
    Original price was: $11.99.Current price is: $9.99.
    Quantity Only 1 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    NITROUS OXIDE SYSTEMS 6an Nut Adapter 16230NOS

    SKU: NOS16230
    Product information
    • Weight0.205 lbs
    • Dimensions4.15 × 3.15 × 1.4 in
    • Quantity

      Each

    • Material

      Steel

    • Color

      Chrome

    • Finish

      Plated

    • Style

      Straight

    Details...
    Original price was: $36.00.Current price is: $32.09.Add to cart
    Original price was: $36.00.Current price is: $32.09.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    MSD IGNITION Blaster Coil – GM Single Connector 8231

    SKU: MSD8231
    Product information
    • Weight1.325 lbs
    • Dimensions7.75 × 6.1 × 2.85 in
    • Quantity

      Each

    • Coil Location

      In-Cap

    • Coil Style

      E-Core

    • Coil Internal Fill

      Epoxy

    • Max Voltage

      40000V

    Details...
    Original price was: $95.00.Current price is: $85.75.Add to cart
    Original price was: $95.00.Current price is: $85.75.
    Quantity Only 2 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    MOROSO Quick Fastener Spring 71425

    SKU: MOR71425
    Product information
    • Weight0.085 lbs
    • Dimensions5 × 3.7 × 1.1 in
    • Material

      Steel

    • Color

      Cadmium

    • Finish

      Plated

    • Quantity

      Set of 10

    • Variant

      Yes

    Details...
    Original price was: $24.14.Current price is: $20.99.Add to cart
    Original price was: $24.14.Current price is: $20.99.
    Quantity Only 3 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    KIRKEY Child Head Support Left 00200C

    SKU: KIR00200C
    Product information
    • Weight0.415 lbs
    • Dimensions7.9 × 5.6 × 2.85 in
    • Material

      Aluminum

    • Color

      Natural

    • Finish

      Natural

    • Quantity

      Each

    • Variant

      Yes

    Details...
    Original price was: $36.30.Current price is: $33.00.Add to cart
    Original price was: $36.30.Current price is: $33.00.
    Quantity Only 1 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    SUPERWINCH Recovery Kit Medium Duty 2576

    SKU: SUP2576
    Product information
    • Weight23.35 lbs
    • Dimensions17.6 × 13.5 × 7.1 in
    • Intended Purpose

      Recovery Kit

    • Quantity

      Kit

    • Capacity

      20000 lbs

    • Product Line

      Medium Duty

    • Gloves Included

      Yes

    Details...
    Original price was: $359.99.Current price is: $299.99.Add to cart
    Original price was: $359.99.Current price is: $299.99.
    Quantity Only 1 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    TURBO ACTION Gate Plate 70075B

    SKU: TUR70075B
    Product information
    • Weight0.45 lbs
    • Dimensions8.8 × 6.5 × 1.85 in
    • Material

      Steel

    • Color

      Black

    • Finish

      Powder Coat

    • Quantity

      Each

    • Forward / Reverse Pattern

      Forward, Reverse

    Details...
    Original price was: $71.19.Current price is: $64.72.Add to cart
    Original price was: $71.19.Current price is: $64.72.
    Quantity Only 4 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    WEATHERTECH Side Window Deflectors 821010

    SKU: WEA821010
    Product information
    • Weight3.5 lbs
    • Dimensions47.5 × 13.5 × 1.75 in
    • Application Specific

      Yes

    • Material

      Plastic

    • Color

      Dark Smoke

    • Quantity

      Kit

    • Finish

      Natural

    Details...
    Original price was: $149.94.Current price is: $124.95.Add to cart
    Original price was: $149.94.Current price is: $124.95.
    Quantity Only 1 left in stock!
    -+
    Add to cart
    Add to wishlist

    109