transmission slipping after putting new fluid in?

Question

I just posted this question about 1/2 hour ago. http://answers.yahoo.com/question/index?qid=20070109093251AAC4eaA

My husband just spoke with the "mechanic" who did everything to our car, and they did NOT do an engine flush. They just replaced the fluid that they accidently drained out. So the engine is slipping after new fluid is put in the car. The only other thing that got done to the car that day as explained in my original question is 2 new front tires, wheel alignment and oil change.

Any ideas?

Answer 1

Like I explained to you in your first question. Transmission fluid is a high detergent oil and some time when putting new ATF in a worn transmission it will clean the material off the clutches that are keeping the transmission functioning. A flush is even worse.
Your only argument is going to be that it worked before they touched the transmission without your authorization. You didn't give us your vehicle specifics but most of them take dextron III transmission fluid, so most likely the correct oil was put in.
If you have any other questions email me.
Dave
(Owner of repair/transmission shop)
People that believe in transmission flushes are victims of television marketing which is a service to sell you and in most cases will lead to larger repairs for their shop. I can tell you this from experience over half the transmissions we rebuild have been flushed in the last 3-months. If you have no knowledge of what goes on inside a transmission and how it is affected internally you should not recommend the service. It's OK to flush if you do it from day one when its new and follow the service interval.

Answer 2

you didn't say what kind of car you have. Not all manufactures use the same fluid. for example dextron fluid used by most manufactures will make a Ford designed for type F fluid slip. Newer dodges can burn up the transmission in a few thousand miles with the wrong fluid.My advice is to flush the transmission and be sure it has the right kind of fluid as soon as possible. The wrong fluid could ruin the transmission. Don't just drop the pan and replace the 4 or 5 quarts of fluid that comes out of the pan the transmission holds at least 10 quarts and needs to be flushed.

Answer 3

my guess is the transmission was already going out, but the clutch material in the old fluid was keeping the symptoms from showing up.
Do you know if they replaced the filter or not?
New transmission fluid will act as a cleaning agent and clean all the old clutch material thus making you tranny slip.

Answer 4

well, just draining the tranny fluid and re-filling it wouldn't cause it to slip. it probably isn't at the right level, or they put in the wrong kind.
tell the MANAGER or OWNER of the shop exactly what happened. your transmission was likely damaged if it has been operated at low fluid level or with the wrong fluid.
if they refuse to take responsibility, go to the better business bureau
i also have to say, what kind of mechanic drains the tranny fluid by mistake when he is changing the oil? good grief...

Answer 5

The engine will not be slipping. The transmission slipping because the clutches are worn or burned. but, do ckeck your transmission fluid just to make sure.

Answer 6

Transmission is history. I had a Dodge that went thru 5. So if I ever have that problem again,I will buy a Jasper transmission. Local shops can't rebluid them good. I buy Toyotas now and do all my servicing myself. I don't trust anymore mechanics.

Answer 7

I was told don't replace the tranny fluid after 60,000 as the shock of it will blow the tran. unless you have the bands inside tightened. I did anyway and out went tran.

Answer 8

try a diff mechanic