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Post by palmsprings on Nov 12, 2011 14:23:48 GMT -5
Joel.. or anyone,what do you think?
I ve made a dozen queries to service departments at mitsubiti shops around southern california.
Most said
"if I havent serviced the AT regularly(?miles) ,they said this :
"Whether a drain or flush ,there is a RISK of the new fluid(4-14 qts+-) dislodging particle buildup in the A/T and possibly allowing some particles to lodge somewhere new and really screwing the AT up.
I have only drained the AT once in 175K.
They all suggested I do nothing and wait (and see what happens).
Even the addition of as little as 4 quarts of sp111 with the pan/filter change is enough to break crud loose and could make things worse.
So..To keep the new fluid from releasing so much crud in a short interval of time,how about reducing the shock effect that even 4 qts may have by adding smaller amounts of fluid along the way?
Here's my idea:
Slowly, over some mileage interval, remove a small amount ATF (1qt for example)through the dip stick tube and introduce 1 new qt SP111 ?
It would seem that by doing it this way it would be less likely to dislodge too much crud all at once .
This is the only way I can figure out how to change the fluid and avoid or reduce the sudden release of crud buildup which MAY ruin the AT.
Your thoughts?
.
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Post by dzuwel on Nov 12, 2011 17:02:45 GMT -5
all i can say is new fresh fluid is better than old unchanged oil.....I manually flushed my trans using the return hose from the tranny cooler, dropped the pan, clean the magnets,change the filter FIRST TIME in 120k miles and no problem...... when I dropped the pan the magnets are all covered with black dust like sludge maybe very fine metal shavings, the oil is very dark red in color..............so far no problem with the fresh sp3 till now...just my experience but enter at your own risk..
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Post by vbrad511 on Jun 10, 2012 22:12:58 GMT -5
From the way I understand it, when the clutch discs wear in an auto trans the particles are suspended and circulated in the fluid. Those particles, even though not still attached to the discs still have a certain amount of function and they still wind up between discs and provide a bit of grip. When you change the fluid you remove all those particles and the new fluid, without them, doesn't fill the voids between the discs as well. I could be wrong about this, but my limited experience with the auto trans has been if you've waited WAY too long to change it, then do change it, you're liable to be forking out for a full-on rebuild soon when the trans fails completely.
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Post by mxmikie on Jun 12, 2012 4:39:18 GMT -5
From the way I understand it, when the clutch discs wear in an auto trans the particles are suspended and circulated in the fluid. Those particles, even though not still attached to the discs still have a certain amount of function and they still wind up between discs and provide a bit of grip. When you change the fluid you remove all those particles and the new fluid, without them, doesn't fill the voids between the discs as well. I could be wrong about this, but my limited experience with the auto trans has been if you've waited WAY too long to change it, then do change it, you're liable to be forking out for a full-on rebuild soon when the trans fails completely. yes you are correct...... you are WRONG |
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Post by palmsprings on Jun 14, 2012 13:56:34 GMT -5
MXMIKIE:You are correct...you are wrong
vbrad511
Those particles, even though not still attached to the discs still have a certain amount of function and they still wind up between discs and provide a bit of grip. (good?)
When you change the fluid you remove all those particles and the new fluid, without them, doesn't fill the voids between the discs as well. (bad ..in this example? )
if you've waited WAY too long to change it, then do change it,
ME:
Hmmmmm, ..bad.....no,good.....no bad....
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Post by akalt24 on Jul 29, 2012 2:53:12 GMT -5
I have also been told if i have not change it in forever and it runs good and no issues than i would risk causeing more harm than good by flushing or fill and drain. This was told to me from many trans shops so i fear to change it but at same time i dont want rack up the miles i mean you change engine oil freq why not trans fluid. You see the engine swaps and trans replacement you dont hear them tareing up cause of new fluid. but it just fills wrong to not change it.
I also look fowward from hearing from a tech member here that works or has worked for the dealer ship or good trans shop
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Post by wretchmanforever on Aug 29, 2012 16:31:53 GMT -5
im rebuilting a 1998 montero sport 2wd trans right now its lose the 1st gear that was it so im just going to repart the broke stuff or the fr disc and steels its not hard to rebuild very easy trans to work with but a trans flush i dont like how they do that i think a filter and flesh fuild not the dollor store stuff either get good fuild also if your trans is slipping it better to fix it right away the more damage that u do the more cost it will be u could just need fr disc at this point but it if slipping bad u ruin the steels and that will cost more money. the valve body is a removable won so that make it easy u do have to deal with the ball bearings and to remove the clutch packs u have to remove the valve body and the band under the body them they pull right out i take some pic for guys tonight. of it and post them so u can see if u have any question or need help call me at 9893396732 my name is tim thanks good luck
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