Transmission fluid change - A/T

[tugasi]

Mga bossing, 3rd owner napo ng A/T 94 Corolla, and odometer reading is at 106k.

I'm planning to have the transmission fluid changed. I'm not sure when was the last time the fluid was changed since I can't contact the previous owner.

Wala naman obvious problem sa transmission (only a burnt fluid smell after using the car), I just want to have the fluid replaced, but after reading an article (below), it made me think otherwise... Advice naman po... TIA!

"If your vehicle has high mileage (> 80,000 miles) and the transmission has not been maintained, I would not recommend replacing the fluid and filter. The fluid that has been in the transmission all this time has become dirty and gritty. This gritty fluid is actually providing needed friction for the worn internal parts of the transmission. Changing the fluid and replacing the filter would remove this friction that the internal transmission parts have become dependent on. If you have not been regularly maintaining the transmission throughout the life of the car, you might actually be doing more harm than good if you replace the transmission fluid at this point. For example, putting new clean slick transmission fluid in an older high mileage vehicle could cause the transmission to slip.

If you are not experiencing a problem, have over 80,000 miles on your car, and have not kept up regular maintenance on the transmission, my advice would be to leave the transmission fluid and filter alone. If you are experiencing a transmission problem like those listed above, seek the advice of a qualified transmission shop before allowing your regular mechanic to service the transmission."

Full article: http://www.trustmymechanic.com/transslip.html

[ericbalajadia]

I think this is just based on assumptions and incredible coincidences and the two cars that had troubles after the service may just as well be having problems soon even before fluid change after all. On some models, there are no clutch to slip and lose friction on.
While the logic of the dirty fluid providing friction on worn internal parts may be debatable, would you wait for your transmission to finally give up on you while on the road? The mere fact that the internal parts are worn indicates an immediate need for repairs. Not doing such repairs because it might upset an already "upset" transmission is almost akin to denying an old man his medicine because he is dying anyway.

[dr. d]

balderdash! i'd change the fluid if it were up to me.
as transmissions go, friction is one thing you want to minimize.

[adddiiikk]

sa experience ko naman i bought a 2nd hand isuzu trooper to be my "project car" the odo reads 100k+ when i got it. naisipan ko palitan yung trans fluid kasi nabasa ko na you should replace it every 40k. after about 2 months bumigay yung reverse nya ayaw na umatras! . im not tryin to scare you or anything. siguro minalas lang ako sa pagbili. maybe the previous owner did not take care of it very well

[batangtalyer]

hindi advisable na palitan ng tranny fluid yan kung matagal na napabayaan. kase kadalasan sa ganyan talgang napadali ang pagkasira ng transaxle or transmission. Una, yung old fluid mataas na ang boiling temp non compare sa bago. 2nd, yung bagong fluid naman, matapang ang detergent non na pwdng mag alis ng mga dumi sa loob ng trany at babara yon sa valvebody. buti pa mag dagdag ka na lang ng fluid or ipa rebuild mo na lang ulit para sure ka na bago lahat ng piyesa mo at mga bushings seals and clutches sa loob.

[shibby75]

Let's say napabayaan nga, how dirty should it be to classify na pinabayaan ang tranny.

Nakabili ako ng matic last month, first thing i check was the tranny fluid. Mabango pa and mejo sweet smelling, no burnt smell. Pero the color is medium dark brown. Parang 1 month old engine ang kulay, is that dirty?

[ericbalajadia]

[SIZE=2][/SIZE]


Here is another discussion about the topic that clearly shows the transmission is in a bad shape already and may soon break down whether you change the fluid or not. Again, it's like contemplating an operation on a person with fears of complication. Don't operate and just "wait" or do and hope for the best. Bold emphasis is mine.

to quote:
Yes, if you haven't serviced it on a regular basis, doing so now could actually cause it to start slipping. Especially if you flush it.
If the transmission is already damaged, those metal shavings and other debris is providing the friction to keep it working. If you flush that fluid out and put in new fluid, there might not be enough friction to work anymore.

Draining it and refilling it might not be as bad though. It depends on the amount of damage. But if you drain it and check out the fluid, you will get a better idea. Since just draining it doesn't remove all of the fluid, if there is damage, the old fluid that still remaining in the converter might be enough to keep it working. Kind of like a fish tank, you leave a little of the old water in there for the algae and bacteria the fish need. The inside of the transmission is worn and damaged, it needs the friction at this point.

But if there is damage, at one point or another you will need to replace or rebuild the transmission. It wont matter how much friction you have if everything is broken and worn down to nothing. But replacing the fluid really isn't going to help at this point, as far as keeping the transmission in good shape. That's why a transmission service is called "preventive" maintenance.

And no, the transmission doesn't get "used" to the old fluid. New fluid is better for the transmission and will prolong the life, however if the transmission is already damaged, the friction provided by the old fluid (and all the debris in it) is what is keeping it from slipping, for now. It will eventually completely tear up the tranny and it will need to be fixed. But changing the fluid at this point could very well cause it to start slipping.

The best thing would have been proper maintenance in the first place... We can all agree to that. At this point, I think your best option is draining out some of the old fluid and adding new. Flushing would completely remove all of the old fluid, so just drain it instead. You will be able to inspect the old fluid for debris and see how bad it is.

Contact any reputable tranny shop and ask them if they will flush your transmission fluid. Then tell them you have 150k + miles and have never serviced it before. 99% of them will tell you no, and why. Then again, some will tell you sure, because they know you will be forced into getting a rebuild right after the service.

http://answers.yahoo.com/question/in...8141032AAiyHOW

[tugasi]

Thanks sa mga reply! I'll have my fluid changed tomorrow, will just keep this thread updated if something happens (hopefully none ).

Btw, regarding on checking the smell of the fluid, should that be done before (cold) or after (hot) using the car?

[speed unlimited]

Iyong pag check mo ng amoy ng fluid mas maganda kung cold pa engine .Kung amoy sunog kahit mainit pa makina ganoon din amoy niyan. Kung chocolate brown na kulay palitin na iyan.

[weisshorn]

ang pagkaintindi ko ng sinasabi sa itaas ay ito: napabayaan na ang transmission kaya ang kumakapit na lang ay ang malapot at madumi na fluid para hindi mag "slip". Ibig sabihin lang ay may sira na ang transmission, kaya lang hindi pa kumakalas kasi dahil sa dumi, antayin na lang na kusang huminto ang sasakyan.

I fully agree to the opinion of sir ericbalajadia.

[tugasi]

Just an update... After the fluid replacement 2 weekends ago, the shifting performance got better (at least from my perspective). I was also able to drive the car to Tagaytay this past weekend, and no issue was encountered (during a long drive). Even used the car going downhill/uphill to/from Taal Lake.

OT: Just had a problem with the rims/tires/brakes getting hot after going downhill... I'll just post this under the correct topic and hope you can follow me there.

Thanks again!

[kristine123]

Just an update... After the fluid replacement 2 weekends ago, the shifting performance got better (at least from my perspective). I was also able to drive the car to Tagaytay this past weekend, and no issue was encountered (during a long drive). Even used the car going downhill/uphill to/from Taal Lake.

OT: Just had a problem with the rims/tires/brakes getting hot after going downhill... I'll just post this under the correct topic and hope you can follow me there.

Thanks again!

have you tried nitrogen for your tires?

[Karl Engbino]

I just bought this 1988 Toyota Celica 2 door coupe 3sfe Automatic Transmission.

I dont have the service history of the car and the color of the transmission fluid when I wipe it on a white cloth is light brown (there are "NO" metal filings)and I know that this is a clear sign that I need to change the fluid.

Also, recently my car find it hard to accelerate even though I put more pressure on the gas pedal, so I thought the fuel filter is going bad so I changed the fuel filter but the acceleration problem is still there.

So now Im torn between having my AT fluid change (just the drain and refill method) or completely flushing the system (the one with cooler hose is temporarily directed to a bucket).

Is it really safe to flush my AT system? Or a simple drain and refill would fix my problem?

[kisshmet]

Thanks sa mga reply! I'll have my fluid changed tomorrow, will just keep this thread updated if something happens (hopefully none ).

Btw, regarding on checking the smell of the fluid, should that be done before (cold) or after (hot) using the car?

Check it hot

Changing the atf is indeed is the proper thing to do and should the tranny fail due to neglect of the previous owner afterwards, just replace the tranny

Use the appropriate atf tranny or the better replacement which are the latest atf

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[supercrap]

Mitsubishi Lancer 2001 1.6 A/T

Where can I buy Dia Queen SP II ATF? Or where can I get A/T fluid changed with SP II? Of course, aside from the casa...

Oh, and magkano kaya? :D

Thanks!

[mokong22]

Sa mga expert sa atf need your inputs. Na over filled ko ata atf ng innova ko ng mga one fourth liters. may effect po ba sa tranny pag di ako nag bawas? Diy ko lang kasi ginawa kaya nasobrahan. Tnx

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[Walter]

Have it drained, there's a tool for that (I think), some kind of suction tool.

[wewoy_romero]

guys this is first-hand experience. NOT hearsay or nabasa lang sa forums. i posted it before sa honda club philippines na forum.

nangyari na sa akin yan when i had my atf replaced. vehicle is a gen 1 honda crv. got the car 2nd hand around 2006 and had the atf changed around 2009 (i clearly remember this was around ondoy time). had no history of tranny issues before. but IMMEDIATELY after the atf change, it started showing signs of tranny slipping (as in the next day). it got so bad that flushing did not work and eventually i had to do a tranny swap january of 2010. until now i am using the crv as my daily ride.

things to note:
1. during the atf change, the mechanics noted that the old atf was very dirty. i know because i was watching them do the service. this is from a reputable shop na kilala sa hcp and lagi ako dun nagpapaservice (until now) so i know the service and mechanics are competent.

2. service was only drain and fill. konti pa lang ata yung may machine na fully drain and refill ang atf nung time na yun.

3. atf used was not the oem one (royal purple) which has a high cleaning daw. gen1 crvs have a reputation of not liking non-oem atf. this is my main suspect at that time. but then again (see #4), yung ginamit na atf after the tranny swap ay hindi naman honda.

4. when the mechanic who did the swap (different shop but reputable also and mas sanay sa tranny) heard the story, he said the EXACT things above na for old trannys or yung hindi masyado na-maintain, hindi pwedeng masyadong malinis kasi yung dumi minsan is what keeps it together.

again, for you to decide. but this happened to me.

[jodski]

Bawasan ang sobra...

Luwagan mo lang ang drain plug na bolt gently hanggang mag drip but don't remove it completely... tighten it back once kapag satisfied ka na sa nabawas.

Medyo messy lang yan kaya prepare ka ng madaming old newspaper para pamunas

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[mokong22]

Bawasan ang sobra...

Luwagan mo lang ang drain plug na bolt gently hanggang mag drip but don't remove it completely... tighten it back once kapag satisfied ka na sa nabawas.

Medyo messy lang yan kaya prepare ka ng madaming old newspaper para pamunas

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Ok sir ill try this method. Tnx

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