The Aisin and Allison transmission are both reliable and well-known, but how do they compare? Here's what you need to know ...

Repairing an automatic transmission isn't cheap ... fluid and filter should also be manageable with the right tools and perhaps some extra manpower. However, more complex issues like worn gears ...

Allison transmissions are renowned for their durability, but until recently, they've been relegated to diesel vehicles.

In our tests, we've found that in some cars a manual transmission can improve gas mileage by a significant 2 to 5 mpg, compared with an automatic, and can cut a car's price by $800 to $1,200.