Use only Toyota brand ATF WS fluid from the dealer which is rather expensive but worth it.
There are some well known major brands that say their fluid meets the Toyota specs. I did 3 drains using approximately 4 quarts per drain of the major brand in one afternoon and the transmission didn't shift properly. About a week later did three flushes with the factory fluid and the shifting smoothness returned.
The 2005 Toyota Avalon has a 5-speed shiftable automatic.
Toyota T-IV fluid.
The 2005 Toyota Avalon has a V6 engine.
The 2005 Toyota Avalon has 24 valves.
You can find the 2005 Toyota transmission fluid dipstick on the left-hand side of the transmission. The transmission fluid dipstick will have a blue handle.
The 2005 Toyota Avalon is a gas-powered vehicle.
The 2005 Toyota Avalon is 16 ft. 5.2 in. (197.2 in.) long.
The 2005 Toyota Avalon has a drag coefficient of .29 Cd.
The 2005 Toyota Avalon runs on regular unleaded.
The height of the 2005 Toyota Avalon is 4 ft. 10.5 in. (58.5 in.).
The 2005 Toyota Avalon has double overhead cam (DOHC).
The 2005 Toyota Avalon's turning circle is 36.9 ft..