Transmission Fluid Black
#1
Driver
Thread Starter
Transmission Fluid Black
Took my car for oil change and guy told me transmission fluid is black and I need to have it changed. I know sometimes when you do change the fluid that the transmission could go bad. My car is a '93 Sc300 with 134k on it. What do you guys think? Change it or leave it be?
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#10
Well see, the reasoning behind doing the drain and fill, is because all that nasty stuff builds up on the seals off the trans and other parts. If you flush and put nice clean fluid with really good cleaning properties in it, it will clean all that stuff up, and your trans might leak and all sorts of things. I am tired so forgive the beginner explaniation.
#11
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#12
Instructor
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Its a double edged sword flushing it, Yes you will probably get improved function BUT if you flush it depending on how long the tranny has been neglected most likely all the gunk and stuff has found its place in your tranny.
When you got 20 year old gaskets covered in metal, burnt fluid, pieces of clutches etc it somewhat "holds them in place" If you flush it most likely it will remove whatever is holding all your seals and what not together.
Im always conflicted when i get a neglected tranny in a used car buy, sometimes i just bite the bullet cross my fingers and flush it but on my first sc300 i wasnt that brave and just slowly cycled all the crap out. putting in a new filter ever 2 or 3 drain and fills.
Safest thing to do is drop the pan, fill accordingly and repeat again in a few weeks. Even though its just a chance you could fck your tranny up by flushing it why take that chance???
When you got 20 year old gaskets covered in metal, burnt fluid, pieces of clutches etc it somewhat "holds them in place" If you flush it most likely it will remove whatever is holding all your seals and what not together.
Im always conflicted when i get a neglected tranny in a used car buy, sometimes i just bite the bullet cross my fingers and flush it but on my first sc300 i wasnt that brave and just slowly cycled all the crap out. putting in a new filter ever 2 or 3 drain and fills.
Safest thing to do is drop the pan, fill accordingly and repeat again in a few weeks. Even though its just a chance you could fck your tranny up by flushing it why take that chance???
Last edited by sj408; 03-26-12 at 10:01 AM.
#14
Lexus Champion
iTrader: (10)
When I got to work on it I found out that it was a sealed type tranny, meaning no dipstick or anyway to check the tranny fluid. So I did a lot of research and it turns out that the tranny used for it, the 4L30E, was shared by GM, Isuzu & BMW, and it had a lot of major problems!!! The reason for it being sealed type was because it was a 4x4 tranny, meaning GM designed it to last a 100k miles without maintenance, until it just breaks down, which eventually is what happened to my uncle's Trooper. So now, the car is still in great condition, but he's looking at needing to get the tranny rebuilt for around $1800-$2400!!! Now, tell me if its worth it?
Thank god for imports!!!