i have about 88 thousand on my MY01 and was gonna get my tranny fluid changed w/ the next oil change coming up...i wanted to flush the tranny but i heard you can't flush manual trannys?..is that true...and also, if you can, how many would you use...thanks

 

I cannot think of a reason you would need to flush the transmission. You could change the transmission with the proper oil, (Honda Manual Transmission fluid) run it for 25-50 miles and then change it again.

 

This is the proper transmission oil for a S2000.

 

I just changed mine today, car has 24k miles on it. It was pretty easy to do, jacked up the car on all 4 jackstands so it would be level and ran about .5qt of MTF through it with the drain bolt off. Then used a fluid pump to get the new MTF in there. Seems a lot smoother now.

 

The best way to flush a tranny, or dif, or engine, is to drain it while it's red hot, immediately after shutoff. This way any fine particles have been picked up from the sump, and are in suspension in the oil. If they are in the oil, they come out with the oil. if the car sits to long, they will eventually settle to the bottom, and oil suction will hold them in place.

 

Not sure what you mean by "running 1/2 qt through it with the drain bolt off", but all you did was put 1/2 qt of fluid into the fill hole and have it come out the drain hole. It didn't actually get flushed through the tranny.

 

Get it hot...the flush comes with the draining. If you are really anal then you can heat her up again and drain her. Adding an extra 1/2 quart does nothing as the extra will drain out the fill hole as opposed to the drain hole; metal being what it is will sink to the bottom To me the most important thing is to replace the drain gasket as it easily becomes overcompressed. As to the nice photo of the MTF recommended by Honda I guess he doesn't know the story \

Utah

 

My transmission slices and dices through the gears like butter.

 

I'd go with the consensus here. The best way to change any of the various oils in our cars is when they're HOT. Go for a nice drive before you change it, then do it right away when you pull into your driveway. Just be sure to wear gloves when you do this for protection! The oil drains faster if nothing else, and all the little particles are suspended in the oil and drain out with it into the pan. That way, you start without all the crap that normally settles to the bottom.

 

Simple drain and fill operation! Go for a nice drive and do the tranny fluid imediately which will give your engine oil just a bit of time to cool down so you don't burn the sh!t out of your hands.