Transmission for 2012 GMC Sierra 3500 HD with 6.6L, 4x4, AT, 6.6L, 4x4, exc. Chassis Cab

Transmission for 2012 GMC Sierra 3500 HD with 6.6L, 4x4

Sierra 3500 HD

Transmission Locator

2012 GMC Sierra 3500 HD Automatic Transmission

6L90 RWD 6 speed 6L90, RWD, 6 speed Transmission for 2012 GMC Sierra 3500 HD. Transmission for sale

6L90 Transmission RWD 6 speed for 2012 GMC Sierra 3500 HD 6.0

Bell Housing Included

Billet Torque Converter

Casing Material

Dyno Tested

Flex Plate Included

Radiator Included

Transmission External Cooler Included

Transmission Fluid Included

Transmission Fluid Type

Transmission Type

Conversion Harness Adapter Included

Grade Type

Heat Exchanger Included

Length

Return Cooler Bypass Filter Included

Tag Id

Thermal Bypass Valve Included

Throttle Cable Included

Torque Converter Included

Transmission Manufacturer Code

Transmission Oil Cooler Replacement Required

Pressure Switch Included

For expert assistance and technical support on Transmission Locator Remanufactured Transmissions, please contact Transmission Locator directly. Their knowledgeable team is ready to help with any inquiries, installation guidance, or troubleshooting you may need.  Transmission Locator Technical Support  Phone: 1-877-531-2723 Ext 2 (Toll-Free)

6L90 Remanufactured Automatic Transmission

Advanced Remanufacturing Process: Each transmission is completely disassembled, and critical components are replaced or upgraded to ensure long-lasting performance

Dyno Testing: All Transmission Locator transmissions are dyno-tested under real-world driving conditions to ensure reliable, consistent performance before leaving the factory

High-Quality Torque Converter: A fully remanufactured torque converter is included, tested for leaks, lock-up functionality, and balance to enhance durability and smooth operation

Nationwide Warranty: Every transmission comes with a comprehensive warranty, giving you confidence and peace of mind, no matter where you are on the road

OEM-Level Quality: Each transmission is remanufactured to meet or exceed original manufacturer specifications for seamless compatibility and superior performance

Precision Engineering: Each valve body is remanufactured to OEM specifications, ensuring proper hydraulic flow and consistent shift performance

Transmission Locator 6L90 Remanufactured Automatic Transmission

Transmission Locator Remanufactured Transmissions manufactures automatic transmissions for virtually every vehicle on the road; We are committed to remanufacturing transmissions to the same standards and methodologies used for OEM transmissions; Each Transmission Locator transmission is produced in a World Class manufacturing facility; Our entire process has been developed from scratch, utilizing LEAN manufacturing principles; Our transmissions are produced in a Clean Room environment; Every transmission is built to the same exacting standards by using a precisely documented and controlled process.

Transmission Locator M01961 Remanufactured 6L90 Automatic Transmission Assembly

Average R&R

Tail Housing Included

Transmission Speeds

Bell Housing

Converter Mount/Diameter

Cooler Replacement Required

Lockup

Pan Bolts

Radiator Replacement Required

Transmission Fluid

Bellhousing Bolt Position

Forward Shift Position Quantity

Pan Mounting Hole Quantity

Remove And Replace Time

Reverse Shift Position Quantity

Transmission Extension Housing Included

Transmission Fluid Capacity

Transmission Oil Cooler Included

• Fluid pump is fully detailed with resurfaced pump rotor mating surfaces and machined pump body mating surfaces to maintain correct fluid pressures.
• Late style stator support shaft with updated seal rings used exclusively in all units to eliminate seal leakage.
• Installed upgraded O.E. 30-element low sprag.
• Fully remanufactured torque converter is tested for leaks, lockup, concentricity, and balance. Upgrades exceed OE requirements and eliminate the possibility of front seal leaks, premature bushing wear, and vibration.
• Boost sleeves and oversized pr valve to restore pressure and prevent converter ballooning.
• Oversized AFL valve in valve body.
• Rebuilt rear planetaries with updated lubrication pinion pins.
• Planetary covers removed and replaced for thorough cleaning.
• Tru-Flat qualification process applied to transmission case, valve body, pump, and channel plate prevent cross leaks and pressure losses.
• Every transmission is cold-and hot-tested using a proprietary dynamometer testing program that includes fully synthetic automatic transmission fluid and a filtration system.
• Testing and flushing of TEHCMS.
• New pressure switch films.

Reflash required., Reset adaptive values., Torque Converter with Heavy-Duty Billet Front Cover.

Flexplate Included

OE + 6L90 Remanufactured Automatic Transmission

High-quality billet construction improves strength and reduces flex, warping or cracking compared to stamped OE covers

High-Quality Billet Torque Converter: A fully remanufactured torque converter is included, tested for leaks, lock-up functionality, and balance to enhance durability and smooth operation

Transmission Locator OE + 6L90 Remanufactured Automatic Transmission

The Transmission Locator OE+ Remanufactured Automatic Transmission is remanufactured to original equipment specifications and upgraded with billet torque converter cover and improved lockup friction materials to address common OE torque converter failure points. These targeted enhancements improve structural strength, reduce lockup slip and shudder, and increase durability compared to standard OE replacement transmissions—while maintaining factory drivability and shift characteristics

Transmission Locator OE + M01961SD  6L90 Remanufactured Automatic Transmission with Upgraded Billet Torque Converter

Transmission Locator Pro 6L90 Remanufactured Automatic Transmission

Transmission Locator Pro M01847P Remanufactured 6L90 Automatic Transmission Assembly

Transfer Case Assembly Included

Output Shaft Yoke Included

Shifter Included

Valve Body Recalibrated

Valve Body Style

Prop 65 Y/N

Prop 65 – Long Label

Premium Remanufactured Automatic Transmission

Professionally remanufactured automatic transmission assembly with all new seals, gaskets, and friction components. Precision inspected, rebuilt to OEM specs, and dyno tested for smooth shifting and lasting reliability.

Each transmission undergoes rigorous dyno testing to verify precise hydraulic pressures, smooth shifting, torque converter function, and park lock operation—guaranteeing reliable, trouble-free driving.

Every transmission is fully disassembled, cleaned, and rebuilt using 100% upgraded heavy-duty seals, friction components, solenoids, and torque converter parts to ensure maximum durability and performance.

All transmissions are completely disassembled and cleaned. All cases are media blasted. Internal parts are inspected for wear or damage and replaced as required. All bushings are inspected and replaced as required. All of friction components are replaced with upgraded heavy duty parts. Drum assemblies are air checked and side play is checked to assure proper clearance. All of seals, o’rings and gaskets are replaced. All of solenoids are checked and replaced if they do not pass duty cycle tests. Internal wiring harness are checked and replaced as necessary.  Valve bodies are disassembled, cleaned, and measured for wear. Valve body valves and valve bores are inspected and valve bores are machined as required. Completed valve bodies are tested for proper operation prior to dyno testing.  Transmissions are assembled, end plays are set and fasteners are torqued to the required specification. All of transmissions are dynamometer tested to ensure proper pressures and shift quality throughout the operating range.  All upshifts and downshifts are checked against preset parameters.  Torque converter stall speed and lockup is verified on the dyno test.  Transmission park locking mechanism is checked during dyno test. (where applicable). [Torque Converter] All of converters are dynamic balanced  All of pumps are furnaced brazed. All new bearings and o’rings. All new springs and rollers in stator. All new thrust washers. All new friction liners in overdrive lockup converters. Converter endplay and hub/pump runout and diameter is checked

6L90 4WD / AWD 6 speed 6L90, 4WD / AWD, 6 speed Transmission for 2012 GMC Sierra 3500 HD. Transmission for sale

6L90 Transmission 4WD / AWD 6 speed for 2012 GMC Sierra 3500 HD 6.0

Transmission Locator M01868 Remanufactured 6L90 Automatic Transmission Assembly

Transmission Locator M01958 Remanufactured 6L90 Automatic Transmission Assembly

Transmission Locator OE + M01868SD  6L90 Remanufactured Automatic Transmission with Upgraded Billet Torque Converter

Transmission Locator OE + M01958SD  6L90 Remanufactured Automatic Transmission with Upgraded Billet Torque Converter

Transmission Locator Pro M01868P Remanufactured 6L90 Automatic Transmission Assembly

1000 4WD / AWD 5 speed 1000, 4WD / AWD, 5 speed Transmission for 2012 GMC Sierra 3500 HD. Transmission for sale

1000 Transmission 4WD / AWD 5 speed for 2012 GMC Sierra 3500 HD 6.6

• Late-OEM front pump covers eliminate cracking around torque converter pads.
• Upgraded lube regulator valve and torque converter relief spring eliminate delayed engagements and reduce operating temperatures.
• F-Trim valve sleeve greatly reduces possibility of overheated torque converter.
• E-Shift valve spring enhances shift quality and increases durability.
• Additional friction plate added to C3 clutch increases load capacity.
• Completely remanufactured late design pump with new line bore bushings eliminates leaks and provides superior flow and durability.
• Fully remanufactured torque converter is tested for leaks, lockup, concentricity, and balance. Upgrades exceed OE requirements and eliminate the possibility of front seal leaks, premature bushing wear, and vibration.
• Bushings and machined surfaces polished to a mirror-like OE finish of 15 RA or less.
• Tru-Flat qualification process applied to transmission case, valve body, pump, and channel plate prevent cross leaks and pressure losses
• All-new custom-spec bushings to improve internal fluid flow control and pressures.
• Every transmission is cold-and hot-tested using a proprietary dynamometer testing program that includes fully synthetic automatic transmission fluid and a filtration system.

1000 RWD 6 speed 1000, RWD, 6 speed Transmission for 2012 GMC Sierra 3500 HD. Transmission for sale

1000 Transmission RWD 6 speed for 2012 GMC Sierra 3500 HD 6.6

Transmission for 2012 GMC Sierra 3500 HD with 6.6L, 4x4, AT, 6.6L, 4x4, chassis cab

2012 GMC Sierra 3500 HD Automatic Transmission

Options: AT, 6.6L, 4x4, exc. Chassis Cab