SunCoast 2300 Stall 1074 Converter, 2001-2016 LB7/LLY/LBZ/LMM/LML

Part# GM-1074-3D

$1,815.00 +$350.00 core charge (refundable)

WARNING: Cancer and Reproductive Harm - www.P65Warnings.Ca.Gov

Fits: 2001 thru 2016 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7/LLY/LBZ/LMM/LML Duramax Diesel

The 70 Series of torque converters are some of the most prolific converters ever manufactured for the Allison transmission. These converters drive and feel almost stock at part throttle, but once you start leaning on the throttle heavily, watch out! The SunCoast 1074 is a dual-purpose converter that can be used for towing moderate loads and also works great with street/strip use. The perfect candidate for this torque converter would be a completely stock truck to a heavily modified one that is looking for that magical "best of both worlds."


  • Slightly higher than factory stall speed, approx. 2300RPM
  • Billet triple disc with billet stator
  • Perfect for moderate towing & street/strip use
  • Works well with stock to aftermarket drop-in turbos


  • Billet transmission internals recommended for 500+HP