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Drivetrain› Automatic Transmissions and Components
Transmission Specialties, Inc
Billet Alm Trans Brake GM TH400
SKU: T01H 4009N
Moderate — 2–4 hours
Overview
Show original supplier description
Part #: 4009N
Transbrake Kit - Reverse Pattern - Springs / Solenoid / Valve - Cast Aluminum - Natural - TH400 - Kit
Vehicle Symptoms
- Transmission shifts too slow for racing
- Inconsistent shift timing at high RPM
- Need trans-brake for consistent launches
- Stock valve body not holding gear under load
- Want reverse pattern for quicker shifting
Relevant Conversations
- TH400 reverse pattern valve body installation
- Best trans-brake valve body for drag racing
- TH400 full manual valve body vs stock
- How to install a trans-brake in TH400
- Billet TH400 valve body vs cast
- Transmission Specialties valve body review
- TH400 valve body upgrade for street/strip
- Symptoms of bad TH400 valve body
- TH400 reverse manual valve body kit
- TH400 trans-brake wiring diagram
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
| Brand | Transmission Specialties, Inc |
| Part Number | T01H 4009N |
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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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