Drivetrain› Automatic Transmissions and Components
TransGo
Valve Body Reprogramming Kit
SKU: RE4F04A-HD2
Moderate — 2–4 hours
Description
It features a trick valve that provides firmer 4th gear shifts and improved lockup.
The reprogramming kit corrects and prevents issues such as falling out of gear at a stop, no 3rd gear after a 3-2 or 4-2 kickdown, leaky direct clutch inner seals, soft 1-2 shifts, and long 2-3 shifts at heavy throttle. It also includes an upgraded direct (3rd) clutch seal and high-temperature, low-shrink sealing rings.
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
| Brand | TransGo |
| Part Number | RE4F04A-HD2 |
| Category | Drivetrain |
Buy with Confidence
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