SunCoast 3000 Stall 1071 Converter, 2001-2016 LB7/LLY/LBZ/LMM/LML

Part# GM-1071-3D

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

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

Fits: 2001-2016 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 SunCoast converters drive and feel almost stock at part throttle, but once you start leaning on the throttle heavily, watch out! The 1071 torque converter was designed for the LML late model VGT turbos, however recent testing has proven that they also operate very well in early 5 and 6-speed trucks. This converter launches fairly hard and couples extremely well. This is a blast to drive on the street playing around on a Saturday night. The 1071 even makes a stock or mildly modified truck feel like a different animal altogether. This converter will beg you to drive it like you stole it. 


  • Higher than factory stall, approx. 3000RPM
  • Billet triple disc with billet stator
  • Perfect street/strip/race converter while still daily drive-able
  • Works best with large single turbos or compound turbo setups


  • Towing over 7,000lbs. not recommend
  • Billet transmission internals recommended for 500+HP