In Stock & Ready to Freight Transmissions

NV4500 Manual Trans for 1999-2004 GM Pickup, 4×4

Part no: 12573T
Brand: New Process Gear
Condition: Refurbished / remanufactured
Regular price $2,749.00 Save $687.25
Sale price $2,061.75
Sale price ends Mon Nov 30, 11:59 PM PT
+ freight from $295.00, insured LTL, priced by delivery zone (rates)
From $2,356.75 delivered
  • Palletized and heavy shrink-wrapped for freight
  • LTL carrier delivery with optional liftgate service
  • Ships in 1–2 business days from Los Angeles, CA
  • Transit typically 3–14 business days, continental US
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Details & Inspection Notes

Part Number / SKU: 12573T

***Please understand that in the event this is being purchased for a swap CORES are very rare on these and if you do not have the same core to return you will be required to pay the core charge in full****

Application Notes:NV4500; Cast Iron Case, Detachable Bell Housing, Internal Slave Cylinder, Square Four Bolt Shift Tower, Reverse Gear Is Synchronized, Main Case Cast 18157, 23167, Or 33903, Top Cover Cast 18860, or 25137, Tail Housing Cast 18306, Hollander Numbers: 400-03100, 400-03101, 400-03451, 400-04279NV4500; Cast Iron Case, Detachable Bell Housing, Internal Slave Cylinder, Square Four Bolt Shift Tower, Reverse Gear Is Synchronized, Main Case Cast 18157, 23167, Or 33903, Top Cover Cast 18860, or 25137, Tail Housing Cast 18306, Hollander Numbers: 400-03100, 400-03101, 400-03451, 400-04279.

Remanufacturing Process

Every remanufactured transmission we sell is backed by a Million Mile warranty up to 7 years, the best in the industry. The reason we can offer this warranty? Every transmission undergoes the same rigorous remanufacturing process:

  1. Teardown and Triple CleanEvery transmission is disassembled, inspected, and cleaned three times. We also chase all threads and install all new bushings during this process.
  2. New or Re-machined PartsGear wear is checked and worn gears are replaced. Mainshaft straightness is tested and replaced if needed. Clutch disc synchronizers, selector fork, and flywheel are re-machined or replaced as needed.
  3. Dyno TestingOur custom dyno testing machines spin and load test every transmission to verify it’s ready for the road.

When you buy a remanufactured transmission from Aero Engines Inc, you’re buying a transmission that meets or exceeds OEM specifications. And we back that claim up with our available 7 Year, 1 Million Mile Warranty.

  • Quality inspections are conducted 3 times during the remanufacturing process
  • A pre-inspection is done to ensure the unit is free of case cracks, excessive wear and to catch other OEM-related problems that many cores have
  • A second inspection is conducted during the reman process to ensure all component parts meet OEM specifications
  • A final post-build inspection is done to ensure the unit is built to our strict standards
  • 100% inspection of internal parts, including gear wear checks, mainshaft straightness test and synchronizer testing
  • All transmissions are dynamometer tested and run through numerous real-life scenarios
  • Fully remanufactured Manual Transmission
  • Available 7 Year, Million Mile Warranty and Free Core Return Shipping

Startup & Installation Checklist

  • Inspect all external gaskets, seals, spark plugs and timing components prior to installation.
  • Refill engine oil, transmission gear oil and coolant to manufacturer-specified capacities before initial cranking.
  • Prime the lubrication system and verify ECU wiring pinouts, sensors, and ground connections.
  • Startup warranty covers internal lubricated components, cylinder heads, and engine block for 30 days from delivery.

Full terms: 30-day startup warranty · returns