SKU: SUNSC-10L1000-CAT2-4WD-LC

Category 2 Transmission with Expanded E & F Capacity and Deep Pan

Out of stock - Call for Availability - 208-719-7400
Confirm fitment before purchasing
YEARS
2020-2026
MAKE / MODEL
GM/Chevrolet/GMC / Silverado/Sierra
SERIES
2500HD/3500HD
ENGINE
6.6L Duramax L5P
Sale price
$10,277.15
Regular price
$10,595
SAVE $317.85
or
American Express
Apple Pay
Diners Club
Discover
Google Pay
Mastercard
PayPal
Shop Pay
Visa
Free Shipping
ORDERS $70+
Easy Returns
HASSLE-FREE
Earn Rewards
ALLIGATOR POINTS
Not sure this fits your build?
Our diesel experts know these trucks. Call or chat before you buy.
1-208-719-7400

PRODUCT DETAIL

Key Features & Description

Features:

  • High-performance overhaul kit for a complete transmission rebuild
  • 4140 steel dowels replace weak OEM cast aluminum engagement points
  • Deep cast aluminum pan with 4-quart extra capacity for better cooling
  • Direct bolt-in replacement”no machining or modifications required
  • Made in the USA

Built for Extreme Workloads and Heavy Towing

Take your 2020-2026 GM 6.6L Duramax to the next level with the SunCoast SC-10L1000-CAT2-4WD-LC Category 2 Transmission with Expanded E & F Capacity and Deep Pan. Designed for heavy-duty applications, this transmission upgrade delivers exceptional torque handling, enhanced shift quality, and superior durability. Whether you're towing, hauling, or pushing your truck to its limits, the expanded clutch capacity and advanced billet components ensure unmatched reliability and efficiency. With a deep cast aluminum pan for optimal heat dissipation, this transmission is built to keep you on the road and out of the shop.

Innovative Design, Unmatched Reliability

Built to exceed factory limitations, the SunCoast Category 2 10L1000 transmission features a 29% increased clutch capacity in the E drum, a 25% upgraded F clutch, and reinforced D clutch components. The billet T6061 aluminum apply piston minimizes deflection, while 4140 steel dowels eliminate OEM weak points, preventing premature wear. The Raybestos GPZ friction clutches and precision steel clutch plates ensure smoother shifts, greater torque capacity, and extreme durability. The direct-fit design allows for seamless installation, requiring no modifications, so you can upgrade with confidence and keep your truck running stronger, longer.

Vehicle Fitment: 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax L5P

Notes:

  • Refundable $3,500 core charge applies

FITMENT GUIDE

Exact Fitment — Verify Your Year

Year RangesYears
Make
Model
Series
Engine
2020-2026
GM/Chevrolet/GMC
Silverado/Sierra
2500HD/3500HD
6.6L Duramax L5P

CUSTOMER REVIEWS

What Buyers Say

Call a Diesel Expert, we'll find the right fit for your build

Not sure this part is right for your truck? Our team knows these platforms inside out. No hold music, no scripts.

Chat with Us