Hello. I feel like -servicing- an Auto Trans with 150,000 miles on it is OK, but -Flushing- it is not.
I basically think (correct me if I am wrong) that Transmission Flushes - especially the ones that shops do with the machine - WILL kill an older Trans basically because they break loose old crap that kills the trans, and you had a working trans and now it doesnt work (ATFs work through th efluid.)
I also am thinking that if you DROp the pan, CATCH about... oh... as much as a Gallon (4 quarts) of the old mystery good stuff lol, and then:
1) CLEAN the screen (I have heard you clean it, not replace it) and
2) CHANGE the gaskets,
3) LOOK AT the Front Seal.....
4) Change the Filter...
and 5) get all the metal shavings and crap that WILL be in the pan OUT....
and THEN 6) Put back in Valvoline MaxLife ATF (and I am wondering how much of the old stuff, not touching the torque converter, but also checking and maybe replacing the vacuum lines) ...
... that in doing this you have not Flushed the transmission, maybe replacing only about 1/3 of the fluid with new MaxLife fluid, and will be ready to do it again in another 150,000 miles. :)
Is this a good thinking, or no?
And how mich of the old fluid - should- be put back in to avoid the Instant-Dead trans that happens when you DO flush like an idiot?|||Filter and screen are one in the same. You don%26#039;t put one drope of the old fluid back in.|||Measure the number of quarts of old fluid drained from the transmission using the empty quart bottles and refill with the same amount. Check the hot fluid level later.
http://www.extremehowto.com/xh/article.a鈥?/a>|||find the history of the vehicle.........IF THE FLUID WAS NEVER CHANGED IN 150K MILES, DO NOT, I REPEAT, DO NOT CHANGE IT NOW......all your good intentions will lead to a host of leaks.........if it weren%26#039;t changes in 150k miles, there is sludge on the bottom sealing any leakage.....new fluid with cleansers will promote the seals to leak..........leave well enough alone if you have no problems shifting....
