FTI Performance TH400 Level 4 Transmissions TH400-4UB

The TH400-4UB carries an Ultra Bell bellhousing, a feature neither of the other two TH400 Level 4 listings in this group has, and like the bare 4S version it comes without a torque converter, a cooler, or fluid in the box.

What sets the Ultra Bell version apart

Besides the Ultra Bell housing for extra structural integrity, this unit runs a shorter 4.063-inch tailshaft, a figure unique to this particular listing in FTI's TH400 Level 4 group. Everything else carries over: the hardened-steel, 30-spline input shaft, the 2.43 first gear, a billet steel clutch hub set in a black OEM-style case with a deep aluminum pan, and the same SFI 4.1/30.1 rating.

What is inside the valve body

A trans-brake built into the full manual valve body again handles launch control, with heavy-duty steels and clutches, a 34-element intermediate sprag, a high-flow pump, race prep built into the stock case, and a billet forward clutch hub plus intermediate retainer adding strength; a dipstick, fluid, flexplate, harness, and cooler all stay out of the box.

Q: What should this particular version go into? FTI rates it at 900 horsepower and steers the Ultra Bell-equipped build toward bracket cars, high-output street builds, and off-road rigs.

Q: Is a torque converter included? No, a torque converter sits outside this listing and needs to be matched and bought separately.