SunCoast GM-1058-3D Triple Disk Torque Converter | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Features

• Triple disc torque converter for maximum holding power and durability

• Forged billet steel cover for strength under extreme torque loads

• Billet stator resists damage from prolonged brake stalling

• Ideal for heavy hauling, racing, sled pulling, or high-performance daily driving

• Supports higher stall RPM for improved turbo spool in modified applications

• Designed and manufactured in-house by SunCoast

• Customizable stall and torque multiplication options available

Built for serious performance, the SunCoast GM-1058-3D Triple Disk Torque Converter is engineered to take your Duramax-powered truck to the next level—whether you're racing, pulling, towing, or daily driving with power on tap. Designed for use with the Allison 1000 transmission, this heavy-duty converter is optimized for trucks running larger turbos or demanding more from their drivetrain under high load.

SunCoast manufactures every component in-house, ensuring superior quality control and the ability to meet custom specifications like adjusted stall speeds or torque multiplication. The triple-disc clutch setup ensures firm and reliable lockup, even under extreme power levels, while the forged billet steel cover resists warping and flexing in the most punishing conditions.

The billet stator adds another layer of durability—especially during brake boosting and aggressive launch conditions, where extended stall times can wreak havoc on lesser converters. Whether you're hitting the track or hauling max loads, this converter is designed to perform and built to last.

Fitment:
2001–2016 GM Silverado/Sierra 2500HD & 3500HD 6.6L Duramax (Allison 1000 Transmission)

Warranty:
Backed by SunCoast’s Limited Warranty (see manufacturer for details)

Fitment Notes:

• Designed for Allison 1000-equipped Duramax models

• Higher stall converters are ideal for turbocharged setups requiring brake boosting

• Professional installation recommended for optimal results

• Not intended for stock-tuned trucks without supporting mods

Use Cases:

• Perfect for sled pulling, drag racing, heavy towing, or high-performance daily driving

• Custom converter stall available upon request directly from SunCoast