Changing automatic transmission Fluid can be Harmfull to the trans?

Question

This is what I have heard about a high mileage trans that has never been serviced before. If it's operating fine but has high mileage, can I screw it up with a service?
Thanks

Answer 1

There are tons of old remedies for automobiles. Here is one that I used to help out a high mileage client recently.
She is a delivery lady on a gift package mail order business.
Driving all over New England she had amazing mileage on
an old oldsmobile medium size engine eight cylinder about
130,000 miles. Having only changed the transmission oil
while under warranty and once more as ordered by her
mechanic, she said it was about 70,000 miles since and
her mechanic hesitated to add fresh. I read the manuals
over and told her to use a cheaper version available right
at dollar store. They had some town car high travel oil left
over because the local limousines were overstocked. Though at an auto store it would have been 11.00 So 5,000
miles later it is running good. Just be sure it isn't inferior
quality, your good store could be the dollar.

Answer 2

Kneedeep is real. the perfect state of affairs is that the fluid and clear out are replaced on a universal foundation as defined by way of the producer. in spite of the indisputable fact that, there are a number of circumstances the place proprietors have disregarded the concepts and pushed on the comparable fluid for years. The transmission worked properly until the fluid replaced into replaced however the transmission by no skill worked exact back after the fluid replaced into replaced. understanding the maintenance historic previous of the transmission could desire to enable you to opt for despite if that's perfect to alter the transmission fluid/clear out or if leaving it on my own could desire to be the perfect answer.

Answer 3

Actually it is recommended that you change your transmission fluid every 15,000 miles to 100,000 miles. Most transmission experts recommend changing the fluid and filter every 25,000 miles. When you do have the transmission serviced make sure that the correct fluid is used to re-fill it.

Each transmission manufacturer has their own recommendation for the proper fluid to use and the internal components are designed for that specific formula. GM usually uses Dexron, Ford uses Type F, Toyota sometimes uses Type T. A transmission will not work properly or may even slip or shudder with the incorrect fluid, so make sure. Your owner's manual will tell you which fluid is required.

Answer 4

Yes you have heard right. As a transmission is used it builds up varnish and other substances that take up wear.If you change the fluid on a HIGH MILEAGE transmission the new fluid will dissolve all that varnish and all those worn out parts that the varnish buildup covered up will no longer have their wear taken up by the varnish and the transmission will fail due to the fact that every part that was worn out will no longer work properly.If the transmission is operating fine leave it alone except for checking and adding fluid as required.

Answer 5

No it's not harmful, it'll be harm full not too. What is harm full sometimes is a tranny flush on an older high mileage tranny. Drop the pan, replace filter and gasket and put in fresh fluid. This won't get all the fluid replaced but do it again yearly and that will be better then risking a flush or leaving the dirty fluid in there any longer.

Answer 6

in some cases, the answer may be yes. As a transmission aquires more and more miles, it can accumulate debris from normal wear, and also accumulate 'sludge'. This debris and 'sludge' accumulates in quantity due to lack of proper service, and when transmission is finally attended to, it can dislodge during fluid change, and enter the valve body, where it may cause the various valves to become stuck due to the close tolerances. This will, of course cause transmission failure. My advise is to take it to a reputable transmission shop, tell them it is high mileadge, and they may be able to sucessfully flush it, then service it properly. This will be more costly than doing a service your self, but may prevent failure due to service procedure. Hope this helps. good luck!