The Ridgeline’s 2008 model with a five‑speed automatic typically holds about 12 quarts of ATF when fully filled. A standard pan drain and refill usually replaces around 4–5 quarts. Exact figures can vary slightly by vehicle condition and maintenance history, so consulting the owner’s manual or Honda service data is advised.
Understanding the transmission fluid capacity helps plan maintenance tasks such as a simple drain-and-fill, a complete fluid change with a new filter, or a cooler line flush. Below are the common figures used by technicians when servicing this transmission in the Ridgeline’s 2008 model year.
Capacity overview
Before listing specifics, note that values refer to typical service data for the 2008 Ridgeline’s 5‑speed automatic. They can vary with model year updates or if a filter is replaced during service.
- Full capacity (including the torque converter and cooler lines): approximately 12.0 to 12.6 quarts (about 11.4–12.0 liters).
- Drain-and-fill quantity (pan drain only, no filter change): roughly 4.0 to 5.0 quarts.
- Full service with new transmission filter and pan gasket: about 12 quarts.
For everyday maintenance, your most common scenario will be a drain-and-fill, which replaces roughly 4–5 quarts of ATF. If you’re performing a complete service that includes removing the pan, replacing the filter, and resealing the pan, plan to refill close to the full capacity of about 12 quarts.
ATF type and service notes
Use Honda‑specified automatic transmission fluid (DW-1) for the Ridgeline. Always verify the exact fluid specification in the owner’s manual or by checking Honda’s current service data for your VIN. Check the transmission level with the engine at operating temperature and following the manufacturer’s procedure to ensure an accurate reading.
When planning a refill, consider that the dipstick readings may change after the transmission has warmed up and cycled through gears. To avoid overfilling, add fluid incrementally and recheck the level until it reads within the recommended range on the hot scale.
Note: If you’re unsure about your vehicle’s specific capacity or service requirements, contact a Honda service advisor or a qualified technician. Individual vehicles can vary slightly based on production changes, fluid type, and any prior maintenance.
Summary
In summary, the 2008 Honda Ridgeline’s automatic transmission holds about 12 quarts of ATF when filled to capacity. A standard drain-and-fill will typically replace 4–5 quarts, while a full service with a new filter and pan gasket will bring the fill back to roughly 12 quarts. Use Honda DW-1 ATF and follow the official procedure to ensure accurate levels and proper transmission performance.