Drivetrain› Automatic Transmissions and Components
TCI Automotive
GM TH400 STOCK HD SPRAG
SKU: T00M 227800
Moderate — 2–4 hours
Description
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 | TCI Automotive |
| Part Number | T00M 227800 |
Videos
Race TH400: Drums
TH400: 4L80E Drum Retrofit
Improve TH400 Performance, Consistency & Safety with the Sonnax Smart-Tech Drum Module (34555-01K)
TH400: Aftermarket Forward Drum Assembly
TH400 Rebuild: Input Drum (Inspection) #SouthpawAutoworks
TH400 Build Series - Planetary Gear Set (Assembly + Installation + Rear Unit End-Play)
TH400 Build Series - Building Clutch Drums
TH400 Build Series - Installing Intermediate Clutch, Front Band, Direct + Forward Clutch Drums
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.
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