LS / LT Swap TH350 TH400 Converter Hub to LS1 Flexplate Crankshaft Adapter

LS/LT Crankshaft Hub adapter for Torque Converter.

Adapts Powerglide, TH400, 4L80E, TH350, 2004R, 700R4, 4L60, 4L60E (from Non LS engine) torque converter snout to LS/LT

See our LS/LT Crankshaft and Flexplate guide to determine where to place your crankshaft hub adapter
Made in Wichita, Kansas from USA produced steel
Compatible with all LS and LT series engines Gen 3, 4, 5 (except 99-00 6.0L does not require this.)
Includes: 1 adapter ring (inserts into rear of crankshaft)

***if installing a 6.0L engine from a 1999 or 2000 model then this part is not required. All other engines and years must use a crank adapter for any transmission that did not come factory behind an LS engine. Also a flex plate will be required due to the bolt pattern being different (use 551356, 551346, or re-drill your flex plate for the correct torque converter pattern)

Compatible with LOCTITEÂ® 680 for slip fit components

Looking for an Affordable, In Stock, Plug and Play wiring harness for your LS Swap? PSI sells Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. These harnesses include the Gen II LT1/LT4, Gen III (24x) LS1/LS6 and Vortec Truck Engines as well as Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT / ECOTEC3 Engines. All PSI Harnesses are Made in the USA and are 100% Computer Quality Tested. In addition to wiring harnesses, PSI carries Holley Products, Vintage Air A/C, Dakota Digital Gauges, HPTuners and PCM programming, Fuel Pump Kits, Engine Sensors, Extension Harnesses, Replacement GM connector pigtails and a complete line of hardware to complete your conversion!

My Cart

LS / LT Swap TH350 TH400 Converter Hub to LS1 Flexplate Crankshaft Adapter

LS/LT Crankshaft Hub adapter for Torque Converter.

Adapts Powerglide, TH400, 4L80E, TH350, 2004R, 700R4, 4L60, 4L60E (from Non LS engine) torque converter snout to LS/LT