The TH350 and TH400 are similar in look however their capabilities and OEM applications are far different. The TH350 is a smaller less durable transmission seen mainly in cars and light duty trucks, where the TH400 is the HD stronger transmission used primarily in Larger Trucks and High Performance applications.
Yes—this SportMonster package ships with a matched torque converter.
Ensure strong cooler flow, fresh lines, and consider an auxiliary cooler and deep pan for heat control.
Jump to: Cooling & fluid • Converter matching • Gearing with non-OD • Install checklist
Heat kills clutches. Flush or replace the cooler and lines, verify strong return flow, and add a low-restriction auxiliary cooler for hot climates or spirited use. Use fresh, high-quality ATF and verify level at temperature.
Stall choice affects launch and heat. Your SportMonster TH350 ships with a matched converter based on weight, rear gear, tire, and torque curve for crisp launches and drivability.
TH350 is a stout 3-speed. Pick rear gears with cruise rpm and tire size in mind. Balanced gearing keeps cruise rpm reasonable while maintaining punch off the line.
No TCM learn needed. Ensure kickdown cable/switch is set correctly for your vehicle.
Run a high-quality ATF suited to your climate and use case; we can advise for your combo.
We match stall and build from your torque curve, weight, gears, tire, and usage to keep heat in check and launches consistent.
