The Boss Hog 47402 is a Night Stalker series lock-up torque converter for the GM TH350C (298mm), and it will not fit the non-lock-up TH350 or TH400. It runs a 2,200 to 2,800 RPM stall and is designed to strengthen the weak points of the factory converter with a much thicker, stronger lock-up liner, a modified heavy-duty stator, and new Torrington-style encased bearings so it handles more power and runs cooler. It uses the factory 12 in core, a 30-spline CNC-machined turbine hub, a hardened chrome moly impeller hub, and a 1.703 in crank pilot. Every unit is leak and pressure tested, digitally balanced, and made in the USA.
- Series: Night Stalker
- Transmission: GM TH350C (298mm, lock-up)
- Fitment Warning: Will NOT fit TH350 or TH400
- Stall Speed: 2,200-2,800 RPM
- Core: 12 in (factory)
- Bolt Circle: 10.75 in
- Turbine Spline: 30 (CNC-machined)
- Lock-Up: Yes (extreme-duty, thicker/stronger liner)
- Impeller Hub: Hardened chrome moly
- Bearings: Torrington-style encased
- Stator: Modified heavy duty
- Crank Pilot: 1.703 in
- Bolt Size: 10mm x 1.5
- Anti-Balloon Plates: No
- Balance: Digitally balanced
- Build: Leak & pressure tested; made in USA
- Part Number: 47402
WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
FAQ
What transmission does the Boss Hog 47402 fit?
It fits the GM TH350C lock-up transmission only. It will not fit the non-lock-up TH350 or TH400.
What is the stall speed?
The 47402 has a 2,200 to 2,800 RPM stall. Advertised stall varies with your vehicle setup.
Is this a lock-up converter?
Yes. It uses an extreme-duty lock-up with a much thicker, stronger liner than the factory converter.
What are the key fitment specs?
It is a 30-spline turbine hub with a 10.75 in bolt circle, a 12 in factory core, and a 1.703 in crank pilot.
Which Boss Hog series should I choose?
Boss Hog groups these converters by build level. Night Stalker suits stock to mild combinations, Street Bandit is the step up once you have upgraded two or more items such as intake, heads, headers, exhaust, cam, or gearing, and the Out Law racing series is for power adders like nitrous, a supercharger, a turbocharger, or a trans brake.
