2022 Ram 1500 Transmission Fluid & Service

Quick answer

• Transmission make/model: ZF 8HP75 / 850RE (8-Speed Automatic)
• OEM fluid spec: Mopar ZF 8&9 Speed ATF, or equivalent
• Drain & fill capacity: Approximately 5.5-6.0 quarts (verify with dipstick)
• Full overhaul capacity: Approximately 8.5-9.0 quarts
• Filter OEM part number: Verify with dealer or service manual
• Recommended service interval: 60,000 miles (severe duty) to 100,000 miles (normal duty)

Fluid type explained

The 2022 Ram 1500 is equipped with a sophisticated ZF 8-speed automatic transmission (either the 8HP75 or 850RE, depending on the engine). This transmission requires a very specific fluid to function correctly: Mopar ZF 8&9 Speed ATF. This is a low-viscosity, synthetic fluid designed for the high-pressure, high-temperature environment of a modern automatic transmission. Using a different fluid, such as a generic ATF or even an older Mopar fluid like ATF+4, can cause shifting problems, overheating, and even premature transmission failure.

Service procedure

There are two main ways to service your transmission fluid:

• Drain & fill: This is the most common and straightforward method. It involves draining the fluid from the transmission pan, replacing the filter, and refilling with fresh fluid. A drain and fill typically replaces about half of the total fluid in the transmission.
• Full exchange: A full fluid exchange uses a machine to pump out all of the old fluid while simultaneously pumping in new fluid. This method replaces nearly 100% of the fluid, but it is more expensive and not always necessary.

For most owners, a drain and fill is sufficient. However, if the fluid is very old or burnt, a full exchange may be recommended.

Service interval

The recommended service interval for your 2022 Ram 1500's transmission depends on how you use your truck:

• Normal duty: If you mostly drive on the highway and do not tow or haul heavy loads, a service interval of 100,000 miles is acceptable.
• Severe duty: If you frequently tow, haul heavy loads, drive in stop-and-go traffic, or operate in extreme temperatures, you should service your transmission every 60,000 miles. A severe duty service interval is also recommended for any truck used for commercial purposes.

Common transmission problems

The ZF 8-speed transmission is generally very reliable, but there are a few common issues to be aware of:

• Rough shifting: Some owners have reported rough or jerky shifting, especially when the transmission is cold. This can sometimes be resolved with a software update from the dealer.
• Leaking fluid: Any transmission can develop leaks over time. If you notice any red or brown fluid under your truck, have it inspected by a qualified technician immediately.
• Solenoid failure: The solenoids in the valve body can sometimes fail, causing a variety of shifting problems. This is a more involved repair, but it is not uncommon on high-mileage transmissions.

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