redsand187 said:
Compare it to some other common systems on the vehicle. Lets say the braking system. It's hydraulic, it works pretty much identical to the transmission in that reguard. How many people have you heard of that have had their brake fluid changed, and lost their brakes soon there-after? QUOTE]
not to bash u or anything but that does happen frequently, the master cylinder rides in the same spot all the time when you bleed your brakes or blow a line it move much further that usualy. this can cause the seals to go. just like a seal on a shaft that gets a grove your master does the same thing now when you go moving it over that grove it can cause damage. not always but sometimes.
yea this was a little off topic so
change the fluid new is better than old less contaminates also when changing the filter make sure it is in super clean environment tranny's don't take well to dirt use those rags that don't leave lint.
How does bleeding the brakes move the cylinder farther? Most places that bleed brakes do it one maned with a vaccum pump. Even if you did it the two man way, the cylinder should not be moving any further then normal operation. It's not like you can press the pedal farther then it is possible.
The point is people don't have pre exsisting conditions with their brake systems and come in to have it flushed, then cry when it fails.
Brake systems are inspected closely because of the safety factor, which also makes it an easy sale. People just expect that a flush will fix a dead tranny. Maybe the power steering example fits a little better....