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
    Wheel Front Aftermarket Shop
    Add to wishlist

    MSD IGNITION 455 Buick Billet Dist 8517

    SKU: MSD8517
    Product information
    • Weight4.65 lbs
    • Dimensions19.1 × 6.9 × 6.8 in
    • Quantity

      Each

    • Product Line

      Pro-Billet

    • Trigger Style

      Magnetic

    • Advance Type

      Mechanical

    • Cap Style

      Male

    Details...
    Original price was: $660.00.Current price is: $599.95.Add to cart
    Original price was: $660.00.Current price is: $599.95.
    Quantity Only 2 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    MSD IGNITION GM HEI Distributor Cap 8411

    SKU: MSD8411
    Product information
    • Weight0.93 lbs
    • Dimensions9.4 × 7.45 × 4.35 in
    • Terminal Style

      HEI

    • Internal / External Coil

      Internal Coil

    • Vented / Non-Vented

      Non-Vented

    • Mounting Method

      Twist Lock

    • Terminal Material

      Aluminum

    Details...
    Original price was: $61.00.Current price is: $55.09.Add to cart
    Original price was: $61.00.Current price is: $55.09.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    MOSER ENGINEERING THIN SPACER FOR DRIVE ST UD/EA 80LS

    SKU: MEI80LS
    Product information
    • Weight0.02 lbs
    • Dimensions4.05 × 3.7 × 0.65 in
    • Material

      Aluminum

    • Color

      Natural

    • Finish

      Anodized

    • Quantity

      Each

    • Variant

      Yes

    Details...
    Original price was: $2.76.Current price is: $2.40.Add to cart
    Original price was: $2.76.Current price is: $2.40.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    TRANS-DAPT Th350 Chrome Pan 9074

    SKU: TRA9074
    Product information
    • Weight3.73 lbs
    • Dimensions18 × 14.4 × 4 in
    • Material

      Steel

    • Color

      Chrome

    • Finish

      Plated

    • Quantity

      Each

    • Sump Style

      Stock

    Details...
    Original price was: $46.06.Current price is: $41.87.Add to cart
    Original price was: $46.06.Current price is: $41.87.
    Quantity Only 4 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    VENTSHADE Window Ventvisor 4Pc. 194930

    SKU: VEN194930
    Product information
    • Weight2.15 lbs
    • Dimensions47 × 11.75 × 2 in
    • Product Line

      In-Channel Ventvisor

    • Application Specific

      Yes

    • Front Mounting Style

      Stick-On

    • Rear Mounting Style

      Stick-On

    • In Channel / Out Of Channel

      In Channel

    Details...
    Original price was: $77.00.Current price is: $69.99.Add to cart
    Original price was: $77.00.Current price is: $69.99.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    WEATHERTECH Front FloorLiner 4415901

    SKU: WEA4415901
    Product information
    • Weight8 lbs
    • Dimensions30.5 × 25.5 × 5 in
    • Product Line

      FloorLiner

    • Application Specific

      Yes

    • First Row Included

      Yes

    • First Row 1 / 2 Piece

      2 Piece

    • Textured

      Yes

    Details...
    Original price was: $150.00.Current price is: $135.95.Add to cart
    Original price was: $150.00.Current price is: $135.95.
    Quantity Only 1 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    WEHRS MACHINE Universal U-Joint Protector / Keeper WM14

    SKU: WEHWM14
    Product information
    • Weight0.1 lbs
    • Dimensions4.65 × 3.1 × 1.5 in
    • Material

      Plastic

    • Color

      Black

    • Finish

      Natural

    • Quantity

      Each

    • Adjustable

      Yes

    Details...
    Original price was: $10.13.Current price is: $9.21.Add to cart
    Original price was: $10.13.Current price is: $9.21.
    Quantity Only 3 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    HOLLEY Choke Cable 45-228

    SKU: HLY45-228
    Product information
    • Weight0.525 lbs
    • Dimensions11.05 × 7.4 × 1.95 in
    • Quantity

      Each

    • Component Type

      Choke Cable

    • Electric / Manual

      Manual

    • Material

      Steel

    • Color

      Zinc

    Details...
    Original price was: $41.00.Current price is: $36.54.Add to cart
    Original price was: $41.00.Current price is: $36.54.
    Quantity Only 5 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    HOLLEY Alcohol Diaphragm 135-9

    SKU: HLY135-9
    Product information
    • Weight0.025 lbs
    • Dimensions5 × 3.45 × 0.85 in
    • Gasoline Compatible

      Yes

    • Material

      Viton / Steel

    • Quantity

      Each

    • Variant

      Yes

    • Color

      Blue / Cadmium

    Details...
    Original price was: $33.00.Current price is: $29.11.Add to cart
    Original price was: $33.00.Current price is: $29.11.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    WHITELINE PERFORMANCE Sway Bar Link KLC185

    SKU: WHIKLC185
    Product information
    • Weight1.733 lbs
    • Dimensions6 × 3.5 × 2.5 in
    • Hardware Included

      Yes

    • Quantity

      Pair

    • Bushing Material

      Rubber

    • Bushing Color

      Black

    • Bushing Finish

      Natural

    Details...
    Original price was: $218.26.Current price is: $181.88.Add to cart
    Original price was: $218.26.Current price is: $181.88.Add to wishlist

    33