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Instruction Sheets for Part Number FTI-TH400-45UB
FTI Performance TH400 Level 4.5 Transmissions TH400-4.5UB
Part Number: FTI-TH400-45UB
FTI Performance TH400 Level 4.5 Transmissions
Automatic Transmission, 3-Speed, Ultra-Bell Bellhousing, Reverse Shift Pattern, Full Manual Valve Body, GM, TH400, Each
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Estimated Ship Date: Oct 26, 2026 Would you rather pick it up?
Need It Sooner? We recommend these similar substitute parts:
FTI Performance TH400 Level 4 Automatic Reman Transmission w/Transbrake for GM Chevrolet TH400-4S
Estimated Ship Date: Monday 10/19/2026
Overview
Brand:
Manufacturer's Part Number:
TH400-4.5UB
Part Type:
Product Line:
Summit Racing Part Number:
FTI-TH400-45UB
UPC:
887753825605
Number of Gears:
3
Bellhousing Bolt Pattern Manufacturer:
Chevy
Transmission Shift Pattern:
Reverse
Valve Body Style:
Full manual
Transmission Advertised Horsepower Rating:
1,100
Torque Converter Included:
No
Flexplate Included:
No
Transmission Controller Included:
No
Wiring Harness Included:
No
Transmission Cooler Included:
No
Trans-Brake Included:
Yes
Lockup Compatible:
No
Transmission Pan Style:
Deep
Transmission Pan Material:
Aluminum
Transmission Pan Finish:
Natural
Tailshaft Length (in.):
4.063 in.
Yoke Style:
Slip-on/bolt-on
Input Spline Quantity:
30
Input Shaft Material:
300M
Input Shaft Style:
TH350/400
First Gear Ratio (Automatic Transmissions):
2.43
Clutch Hub:
Billet Steel
Transmission Case Style:
OEM
Transmission Case Material:
Aluminum
Transmission Case Finish:
Black
Transmission Shield Built In:
No
Flexplate Shield Built In:
No
Fluid Fill Location:
Case
Transmission Fluid Included:
No
Dipstick Included:
No
SFI Rating:
SFI 4.1/ 30.1
Remanufactured:
Yes
Quantity:
Sold individually.
Notes:
Features Chevrolet Ultra-Bell bellhousing.
FTI Performance TH400 Level 4.5 Transmissions
FTI Performance TH400 Level 4.5 transmissions begin with a race-prepped factory Chevy case—and end up rated up to 1,100 hp. Each professionally hand-built case includes a short shaft, a billet aluminum drum and forward clutch hub, a 34-element sprague, and race material clutches.
An FTI billet aluminum trans-brake with a full manual reverse valve body is stout enough to handle major power and keeps reverse and first gears closely knit. The included deep aluminum pan allows more fluid capacity for increased cooling, while the 300M input shaft provides amazing strength. Whether you're racing off-road, on the street, or at the track, FTI Performance TH400 Level 4.5 transmissions fit the bill. Order the model best suited for your application.
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