How much transmission fluid does a 2008 F250 6.4 take?

Approximately 13 quarts (about 12.3 liters) for a full service on the 2008 F-250 with the 6.4L Power Stroke and the 5R110W TorqShift automatic; a basic pan drain-and-fill typically uses around 6–8 quarts.

That amount can vary depending on whether you replace the transmission filter, perform a complete flush that moves fluid through the torque converter and cooler lines, and whether you count the fluid in the cooler loop. The 5R110W is Ford's 5-speed automatic used in early Super Duty models; always use the fluid specified in your owner's manual (Ford Mercon V or Mercon LV, as applicable) and check the level warm and in gear per the service procedure.

Typical capacity and what it includes

The following figures describe typical capacities and what they include in a standard service for the 5R110W in the 2008 F-250:

• Total system capacity (pan, cooler lines, torque converter) commonly cited as about 13–14 quarts (12.3–13.3 liters).


• Pan drain capacity (fluid that can be drained from the pan during a standard drain-and-fill) typically about 6–7 quarts.


• New transmission filter adds roughly an additional 0.5–1 quart to the total fill when replaced.


• With a full pan drop, filter change, and no external flush, expect to refill in the neighborhood of 12–14 quarts total to reach the proper level.

Note: Exact values can vary by transmission condition, fluid type, and whether you include the fluid retained in the torque converter and cooler lines. Always confirm the level using the dipstick with the vehicle at operating temperature and on level ground after a service.

How to perform a drain-and-fill or a full flush

Below is a practical outline for common service methods on a 2008 F-250 with the 5R110W. This will help you decide which approach to take and how much fluid to plan for.

• Drain-and-fill: Warm the vehicle, raise the truck, remove the transmission pan bolts, drain fluid, remove and replace the pan with a new gasket, and install a new filter if applicable. Refill with the recommended ATF in stages, then check level.


• Full flush (if you choose this method): Use a transmission flush machine or kit to push new ATF through the system, including the torque converter and cooler lines, following the machine’s procedure and Ford’s guidelines. This typically uses the higher end of the capacity range.


• Check level and adjust: After filling and running through the gears, recheck fluid level with the vehicle at operating temperature (per manual) and top off until the dipstick reads in the correct range.


• Leak check and road test: After the service, verify there are no leaks and test-drive the vehicle to ensure smooth shifting and proper operation.

Performing transmission service on a heavy-duty Ford with a 5R110W requires care to avoid overfilling or underfilling, which can affect shifting and longevity. If unsure, seek professional service.

Summary

For a 2008 Ford F-250 with the 6.4L Power Stroke and the 5R110W transmission, a full service typically requires about 13 quarts of automatic transmission fluid, while a straightforward pan drain-and-fill usually uses 6–8 quarts. Fluid type and service method affect the exact amount. Always consult the owner's manual for the correct specification and follow proper procedure when servicing the transmission.

What was the worst year for the 6.4 powerstroke?

2008
The 2008 6.4L Powerstroke is widely considered the worst year to own due to severe emissions‐related problems, DPF clogging, radiator failures, and early piston cracking.

What transmission is in a 2008 Ford F250 6.4 powerstroke?

In 2008, with the release of the much anticipated 6.4L Powerstroke, Ford also unveiled their new 5 speed Torque Shift transmission, the 5R110W.

What transmission fluid to use on an 08 F250 Super Duty?

2008-2010 Ford F250/F350/F450/F550 6.4 Powerstroke Transmission Fluid Specifications & Capacities

How much transmission fluid does a 2008 6.4 powerstroke take?

6.4L Powerstroke Fluid & Oil Capacity