Methodology, Sources and Corrections

What counts as a source

A figure appears on this site only if it was read in one of these places:

• the automaker's own owner's manual, maintenance guide or warranty page;
• a service bulletin from an automaker, including copies hosted by the National Highway Traffic Safety Administration;
• the transmission, fluid or equipment maker's own technical page;
• a business's own page that prints its price: a dealer service menu, a coupon, a seller's product page;
• a United States government page, such as the Bureau of Labor Statistics, the Environmental Protection Agency or the Occupational Safety and Health Administration.

Cost-guide articles, price estimators, forums and dealer blog posts are not used as sources, even when they rank well for the same questions.

How the facts were collected

All sources were read on November 13, 2026. Each fact was stored once, with the address of the page and the exact words that carry the value. After both checks the store holds 390 records: 308 confirmed, 36 where the source turned out not to print the figure, and 46 where the source could not be opened. Only confirmed records carry numbers on the site.

When a source prints no figure

Then the page says so and gives no number. This happens often. Several national service chains do not print a transmission service price. Some remanufacturers sell by quote only. We found no primary source that prints the labor hours of a rebuild or of a leak repair, or the share of fluid that one drain and refill replaces. Other sites state those figures without a source; this one does not.

Limits you should know about

• The official parts stores of several automakers refused automated reading, so some fluid and part prices come from retailer listings instead. Each table names where its prices come from.
• Prices of remanufactured and used transmissions come from the small group of sellers that print them. They are examples of printed prices, not a survey of the market.
• Dealer service prices are the ones dealers print on their own sites. Most dealers print none, and a printed price can be a coupon. One dealer per brand is not a brand average, and the pages do not present it as one.
• Maintenance schedules are quoted with the model year of the document read. Another model year, engine or transmission can have a different schedule.
• Where the site multiplies a printed quantity by a printed price, the result is marked as our calculation.

How the text is checked

Every page goes through two checks. The first compares each figure in the draft with the stored fact and its quoted words, and removes or rewrites what the quote does not carry. The second is done separately, on the finished text, against the live sources and without access to the stored facts. A page is published only after both.

Dates and updates

Each page shows the date its figures were last checked. Prices on business pages change without notice, so treat every price as true on that date only. When a page is revised, its sources are read again and the date changes.

Corrections

If a figure is wrong or out of date, write to the address on the about page with the page and the line. The source is opened again. If the source no longer supports the figure, the figure is corrected or removed on every page that uses it, and the check date of those pages is updated.