Veins and Venules: Veins are the large return vessels of the body and act as the blood return counterparts of arteries. Because the arteries, arterioles, and capillaries absorb most of the force of the heartâs contractions, veins and venules are subjected to very low blood pressures.
Wondering when to change your automatic transmission fluid (ATF)? Most manufacturers recommend replacing transmission fluid every 30,000 to 60,000 miles. If you tow, or do mostly city driving with constant changes of gears, it may be wise to change your ATF even more often. Here's why. Your automatic transmission has a lot of moving parts.
Frequency: Well that depends on how you drive the car. With normal driving, I try to replace manual transmission fluid every 50K miles and rear end fluid every 100K miles. If you do several track events a year, changing fluids much more often is better. Tools Required: In addition to those items mentioned for jacking the car in other areas of Tech Corner you will need: Something to drain the old fluid into. In general you will be draining about two quarts (maybe a bit more).