Heavy Duty Valve Body + Pump Kit for 10L1000
Fits 2020–2026 Duramax 10L1000 applications.
Package Includes:
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Heavy Duty Valve Body ( BILLET & NON BILLET )
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Pump Kit
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PPE Transmission Deep Oil Pan
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AC Delco Transmission Oil Filter
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3 gallons of synthetic OEM-spec ATF
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All required gaskets and hardware
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TCM tuning software included
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$1,000 refundable core charge included in price
Tuning Compatibility:
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2020–2023: TCM tuning available through EZ Lynk or HP Tuners
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2024–2026: TCM tuning available through HP Tuners only
Important Notice:
Your T93 TCM must already be unlocked before tuning can be loaded. This package does not include TCM unlock service or tuning hardware.
You will need your own HP Tuners device or EZ Lynk AutoAgent to load the tuning.
10L1000 Heavy Duty Valve Body Upgrade (Non-Billet Option)
Our heavy duty upgraded 10L1000 valve body and pump kit is designed to improve reliability, clutch holding capability, line pressure stability, and overall transmission performance for 2020+ GM heavy-duty trucks equipped with the 10L1000 transmission.
This package includes a fully updated and reworked OEM-style valve body with multiple reliability and pressure upgrades already installed.
Included Upgrades:
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Heavy duty high-pressure valve body and pump kit
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Late model redesigned casting upgrade to help prevent casting collapse
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Sonnax sleeve and valve repair kit for ALF valves
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Sonnax solenoid retainers
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Cooler flow valve modifications for:
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Full-time cooler flow
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Easier transmission fluid level checking
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Higher pressure latch setup for increased clutch pack clamping force
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Reconditioned higher-pressure transmission pump
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All valves vacuum checked and springs tested for proper fit and function
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Separator plate screen deleted for improved reliability
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Additional magnets included to help keep the valve body clean and reduce debris contamination
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The factory separator plate screens are known to fail and create debris-related valve body issues. Removing these screens while adding additional filtration magnets greatly improves long-term reliability.
This upgraded non-billet option already addresses many of the common weak points found in the factory 10L1000 valve body while improving pressure control, clutch holding capability, and overall transmission durability.
Optional Upgrade: DNJ Billet Valve Body Upgrade
This billet valve body is an optional upgrade only.
The standard package already includes a brand new updated OEM valve body that contains the latest revisions and updates that many factory-equipped units did not originally come with.
For most customers, the updated OEM valve body included in the package is already a major reliability improvement over the original unit. The DNJ billet valve body is simply available for customers looking to upgrade even further for maximum durability and long-term reliability.
GM heavy-duty trucks equipped with the 2020+ 10L1000 transmission are known to experience valve body-related issues that can lead to:
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Erratic shifting
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Harsh engagement
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Pressure regulation issues
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Limp mode conditions
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Premature clutch failure
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In extreme cases, rear-wheel lockup
The factory cast aluminum valve body is prone to wear over time. The DNJ Billet Valve Body Half eliminates the need for temporary fixes such as:
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Bore sleeves
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Repair kits
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Deleted fluid circuits
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Other short-term repairs
Manufactured from T6061 billet aluminum, the DNJ valve body features upgraded materials, tighter tolerances, and a precision machining process designed to permanently address common 10L1000 valve body failures.
Benefits of the DNJ Billet Valve Body Upgrade:
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Eliminates feed limit low/high issues
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Corrects TCC and mainline pressure regulation problems
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Reduces bore wear
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Helps prevent premature clutch failure
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Helps prevent limp mode conditions
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Addresses the common P0747 code
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Improves transmission longevity and reliability
Core Charge:
$1,000 refundable core charge is already included in the purchase price. Core refund will be issued once the usable original core is returned and inspected.
SHIPPING:
Free Shipping to Customers. Customer is responsible for returning core at their own expense.
Products ships within 5-7 business days from ordering and providing us with all vehicle information.