Choosing the right torque converter can unlock strong launches and efficient power transfer for GM TH-350 and TH-400 transmissions. This guide highlights five top options with stall ranges around 2000–3500 RPM to match street and track setups. Each model emphasizes quality construction, USA manufacturing, and performance tuning for different cam profiles and engine builds. Read on to compare specifications, installation considerations, and performance expectations across popular brands.
| Product | Brand | Stall Range | Image |
|---|---|---|---|
| JEGS Torque Converter For GM TH-350 And TH-400 | JEGS Store | 2300–2700 RPM |  |
| JEGS Torque Converter – TH-350/TH-400 | JEGS Store | 3100–3500 RPM |  |
| JEGS Street Performance Torque Converter for GM 4L60E/4L65E/4L70E | JEGS Store | 2800–3200 RPM |  |
| Allstar Performance Torque Converter | Performance | 2000–2200 RPM |  |
| JEGS TH350 Torque Converter 2700–3000 RPM | JEGS Store | 2700–3000 RPM |  |
Note: The stall speed describes how aggressively a converter engages the engine under load. Matching stall to your cam, compression, and gearing is essential for maximizing launch control and driveability. The following sections review each option’s key details and what kind of build each suits best.
JEGS Torque Converter For GM TH-350 And TH-400 Transmissions
The JEGS unit designed for GM TH-350 and TH-400 transmissions offers a 2300–2700 RPM stall speed, providing a balanced blend of street manners and track capability. Built in the USA with quality materials and careful assembly, this converter aims to improve launches and acceleration without sacrificing reliability. It supports up to 500 horsepower applications, making it suitable for a broad range of moderate to high-performance builds. For cam profiles that peak around mid-range RPMs, this stall range helps maintain qucik response and consistent data on the track.
JEGS Torque Converter TH-350/TH-400 3100–3500 RPM
This model targets stronger engines with larger cam profiles and higher torque outputs, delivering a 3100–3500 RPM stall speed. It is marketed as a performance torque converter for street and track usage, with USA manufacturing and high-quality materials. The higher stall helps spool up larger cams and maintain a firm bottom end while preserving street drivability. It is positioned as economically priced for performance enthusiasts who seek a robust upgrade without straying into premium-class pricing.
JEGS Street Performance Torque Converter For GM 4L60E/4L65E/4L70E
This converter covers modern GM automatics beyond TH-350/TH-400, including 4L60E family units. With a stall range of 2800–3200 RPM and a 300 mm diameter, it targets street applications where improved launch response is desired without sacrificing daily drivability. The design emphasizes economical pricing while preserving dependable performance and durability for long-term usage. It can be an attractive option for enthusiasts upgrading late-model GM transmissions with stock-to-mildly modified engines.
Allstar Performance Torque Converter
Allstar’s offering is a 2000–2200 RPM stall converter designed for TH350 and TH400 setups. This option emphasizes American manufacturing and a straightforward installation suitable for classic builds. The lower stall range supports comfortable street performance and moderate racing sessions, especially in lighter-weight cars or engines with more optimistic compression. The model is positioned as an accessible entry point that still yields noticeable improvements in launch characteristics without complex tuning steps.
JEGS TH350 Torque Converter 2700–3000 RPM
This JEGS model is tuned for 2700–3000 RPM stall, aligning well with moderate to strong engines and cam setups that want a bit more tautness than the 2300–2700 option. The design maintains the USA-made quality and aims to offer a balance between performance gains and street usability. It is suitable for enthusiasts who want a middle-ground stall that still respects daily driving behavior, with a focus on reliable performance under load on the track or street strip.
Buying Guide: Key Purchase Considerations And Comparisons
When selecting a torque converter for GM TH-350/TH-400 and related transmissions, consider engine displacement, camshaft specs, rear gear ratio, vehicle weight, and intended use. A higher stall RPM generally improves initial launch on a powerful cam but can reduce low-end drivability. For daily drivers, aim for a stall in the 2300–3100 RPM range to maintain smooth idle and street manners. For drag-oriented builds, stalls near 3100–3500 RPM or higher may deliver faster times at the track, provided the engine has adequate torque and drivetrain support.
Durability and build quality matter. Look for USA-made units with robust materials, reliable bearings, and proper balancing. Compatibility with your transmission family is essential; ensure the flexplate pattern and bolt circle match, and verify horsepower capacity aligns with engine output. Some options emphasize budget-friendly performance, while others target premium performance with optimized fluid flow and aggressive lockup behavior. Consider whether you want lockup capability, which can improve fuel economy and efficiency.
Installation considerations include converter height, installation torque, and clearances within the transmission bellhousing. A high-stall converter may require upgraded driveline components or a torque converter with a more precise lockup strategy to avoid harsh engagement. If your engine uses a strong nitrous or forced induction setup, you may require a converter rated for higher torque capacity and heat tolerance. Finally, assess warranty and support options from the manufacturer or seller to ensure you have recourse if installation or performance issues arise.
In summary, the five models reviewed provide choices across a stall range from 2000 to 3500 RPM, with several SEMA-grade offerings from JEGS Store and Allstar to suit different GM automatic transmissions. Evaluating your cam profile, gearing, and intended use will help identify the optimal balance between street manners and track performance. This approach promotes predictable launches, improved acceleration, and durable operation under varied driving conditions.