1990 Grand Marquis, car won't shift into overdrive, just goes into neutral when going from 3rd to 4th. 80,000 miles. Changing the fliud and found this in the pan. What is it and what about that black sediment in the pan? It isn't metallic.
Re: What is this part I found in the bottom of the pan?
March 19 2012, 4:29 PM
That part is just used during assembly and is just dropped into the pan when fluid is added. Not a problem, just chunk it. The black stains are probably because the fluid was let go too long between changes. Just clean it up, put it back together, fill it up and see what you have. By the way, I would also drain the torque converter to get all of that dirty fluid out.
Re: Haven't seen one of those in a long time - almost forgot what it was.
March 20 2012, 9:00 PM
Why is that so unusual? Todays transmissions don't need any service. BMW, Mercedes, all say they are sealed for life. Never have to change the fluid. ------------------------------------------------------
Yeaaaahhh..... but Benz and BMW use a special oil that costs 30.00 (or more) per liter/quart... X 10-12 liters/quarts per trans.
Good luck getting "LifeTime" use out of regular Dex III or any other "normal" trans fluid.
Even off-the-shelf synthetic trans fluid won't go "lifetime".
Yes, I agree. There is no way a 1990 AOD will, or ever should, go 80k to 100k miles without a service. Service should be done at 50K miles MAX. Better to do it at 30K... Whatever happened to preventive maintenance? People don't care/are too lazy/don't want to spend the money/don't even know/etc... Oh well, more work and profit for us tranny guys.
I have worked on those Benz and BMW trannys and many of them do NOT last the "lifetime" of the car...
... but that is what they state in the owners manual and servicing guide.
Trans is "lifetime" fill....... trans fluid does not need to be changed... the question becomes... Who's lifetime...???