2004 Duramax Allison Transmission Fluid Capacity: A Comprehensive Guide

2004 Duramax Allison Transmission Fluid Capacity

When it comes to maintaining your 2004 Duramax Allison transmission, one crucial aspect is knowing the correct fluid capacity. This information ensures that you can properly care for your transmission and keep it running smoothly for years to come. So, let’s cut to the chase and get straight to the facts.

Transmission Fluid Capacity and Type

Below, you’ll find a table that outlines the transmission fluid capacity for the 2004 Duramax Allison. It’s always a good idea to double-check your vehicle’s manual for the most accurate information, but this table should give you a solid starting point:

Transmission Fluid Capacity Quarts Liters
Allison 1000 (5-speed) 16.9 16.0
Allison 1000 (6-speed) 17.7 16.7

Now that you know the capacity, it’s essential to choose the right type of transmission fluid. For the 2004 Duramax Allison, the recommended fluid is Dexron III/Mercon or Dexron VI. Make sure to use a high-quality fluid that meets the manufacturer’s specifications to ensure optimal performance and longevity.

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Fluid Change Procedure

Changing the transmission fluid in your 2004 Duramax Allison is a relatively straightforward process. Here’s a step-by-step guide to help you get the job done:

  1. Start by parking your vehicle on a level surface and engaging the parking brake.
  2. Locate the transmission fluid pan underneath your vehicle. It’s usually a rectangular-shaped pan with bolts securing it in place.
  3. Place a drain pan underneath the transmission fluid pan to catch the old fluid.
  4. Remove the bolts securing the pan and carefully lower it down, allowing the fluid to drain completely.
  5. Once the fluid has drained, clean the pan thoroughly, removing any debris or residue.
  6. Replace the transmission filter, which is typically located inside the pan. Follow the manufacturer’s instructions for proper installation.
  7. Reinstall the pan and tighten the bolts securely.
  8. Locate the transmission fluid dipstick, usually near the back of the engine bay.
  9. Remove the dipstick and use a funnel to add the recommended amount of transmission fluid, as specified in the table above.
  10. Check the fluid level using the dipstick. Add more fluid if necessary, but be careful not to overfill.
  11. Start your engine and let it idle for a few minutes to allow the fluid to circulate.
  12. Shift through all the gears, pausing briefly in each position, before returning to park.
  13. Check the fluid level again and adjust if needed.
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Remember, safety is crucial when working on your vehicle. Always wear protective gloves and eyewear, and exercise caution when working underneath your vehicle.

Now that you have the necessary information, you can confidently tackle the transmission fluid change for your 2004 Duramax Allison. By following these steps and using the correct fluid, you’ll help ensure that your transmission stays in top shape, allowing you to enjoy a smoother and more reliable driving experience.


What Color Should Transmission Fluid Be?

What Color Should Transmission Fluid Be?

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