DHD Extreme Billet Allison 10L1000 GM 10 Speed Valve Body Assembly 24066238 24044651

Upgrade your truck with the DHD Extreme Billet 10L1000 Valve Body, eliminating unreliable cast aluminum OE units. This direct replacement resolves issues common to 10-speed Allison transmissions, including harsh shifts, premature clutch wear, limp mode, and P0747 fault codes, without the need for bore sleeves, repair kits, or deleted circuits.

Crafted with a T6061 Billet Aluminum DNJ case half, enhanced valving, precision metering, and solenoid stabilizers, each valve body is assembled and tested to ensure smooth, dependable performance. Years of R&D have gone into designing this valve body for maximum reliability and longevity.

Vehicle Fitment:

• 2020–Present 10L1000-equipped GM Duramax 2500HD & 3500HD
• RPO Codes: MGM & MGU
• Direct replacement for GM part numbers 24066238 & 24044651

Important Notes:

Your VIN is required to confirm proper fitment and compatibility.

Core Charge:

A $1,500 core charge applies to this part. The charge can be partially or fully waived depending on the return of your original valve body, helping reduce costs and ensure compatibility.

Frequently Asked Questions:

Why only one half of the valve body?

The majority of 10L1000 failures are valve body-related, with 99% occurring from bore wear in this section due to subpar OE casting.

Can I install this myself?

Yes, the process is direct replacement but is detailed and time-consuming, requiring careful attention during installation.

Will I need updated software or ECM reflash?

No, as long as components are transferred from your truck’s factory-equipped valve body.