Dirty Transmission Fluid
#18
I'd be extremely careful when it comes to your next move. You already mentioned that the car shifts smoothly and you mentioined you think the fluid looks dark and possibly smells burnt. Before doing another thing.. you have one major thing in your favor. Your car shifts as it should. Go to a shop you trust (not necessarily Lexus) and ask them to inspect your fluid. If you had mentioned your car is not shifting correctly.. that is another story and you would have no choice to to change the fluid. Here you have a high mileage car that by changing the fluid and by changing all of the fluid, you might very well end up with a car that won't shift or even move! The varnish that has built up over time might be the only thing holding your transmission's clutches from slipping. Changing transmission fluid (unless you are the original owner) might be a throw of the dice... be careful my friend. Do yourself a favor and reread the post from Johnhav430. It might be very relevant. You want to do the right thing, but it might not necessarily go that way. If it were me? I'd leave well enough alone until I had a problem which you might not ever have. Good luck and let us know how it works out.
Completely disagree. Like I said, fluid technology changed. Fluid does not varnish like it used too.
6 years at a tranny shop and seen plenty.
Again, doing what I posted gets you almost 1/2 the fluid per dump.
Do not disconnect the tranny cooler without fluid going back into the trans. That fluid is there to lube critical parts. YOU DO NOT WANT TO STARVE IT FOR 20min while adding fluid. A professional machine pumps fluid in.
#19
Granted old Asian Waner trans and the crap fluid they came with in the 60, 70, and early 80's used to varnish bad and they did die when yellow fluid was dumped out and fresh put in.
ATF is very high in detergent. Fresh detergent washes away the films of varnish creating internal leaks at clutch drums and other sealing lands that need fluid under pressure for proper operation.
I'd guess the Audi died from other complications.
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