U.S. CitiesCity-Data Forum Index
Go Back   City-Data Forum > General Forums > Automotive
 [Register]
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
View detailed profile (Advanced) or search
site with Google Custom Search

Search Forums  (Advanced)
Reply Start New Thread
 
Old 01-16-2010, 09:48 PM
 
199 posts, read 535,447 times
Reputation: 103

Advertisements

I have yet to do this, and am starting to get the sense that maybe I should get this service done.

I know a complete flush is a bad idea.

I'm thinking of a drain and refill, and change the filter.

I hear a slight squeak from the transmission sometimes (not all the time), and it's shifting as well and as smoothly as ever.

A mechanic recommended a drain and refill at around 60,000, but now I'm up to well over 100,000 without issues.
Rate this post positively Reply With Quote Quick reply to this message

 
Old 01-16-2010, 10:02 PM
 
Location: Poway, CA
2,698 posts, read 10,706,569 times
Reputation: 2238
what's the manufacturer's recommended service interval for your vehicle?

as to whether i do it, i did once. it was on the only vehicle i ever owned with an auto tranny that had enough miles to warrant it. i bought it used with TONS of miles on it, so it seemed the prudent thing to do.

i would normally say that at your mileage you should have done this at least once already, but oddly enough i was changing the oil on my wife's Accord today when i got to thinking about its tranny fluid. the car has 45K miles and i was worried i had overshot the recommended service interval. i checked the manual, and it says not to change until 120K!!! then again, it also states to only change motor oil every 10K and the filter every 20K, so it raises an eyebrow to say the least.

like you, i've heard that a flush is generally a bad idea for a vehicle that has gone so long without service. i don't have any personal experience with it, though. as to changing the fluid and filter yourself, it's pretty striaghtforward. you just have to take your time and use a cross pattern when re-installing the tranny pan so you don't get a leak.

Mike

Last edited by whiteboyslo; 01-16-2010 at 10:13 PM..
Rate this post positively Reply With Quote Quick reply to this message
 
Old 01-16-2010, 10:49 PM
 
3,071 posts, read 8,184,730 times
Reputation: 1651
Every 30 k its good to remove the pan and replace the filter and any fluid and its also good to add a bottle of lucus trans additive. The additive has chemicals that help keep the seals flexable and inside parts clean .
Rate this post positively Reply With Quote Quick reply to this message
 
Old 01-16-2010, 11:22 PM
 
Location: U.S.A.
3,306 posts, read 10,414,986 times
Reputation: 2952
Technically this is already done if the filter and pan fluid are replaced every 15000 miles or so. That's all that is required to maintain the transmission fluid for the life of it. However, there is hope if you have neglected to do this or acquired a vehicle with no knowledge of it's maintenance history. One of the easiest ways I have been able to change out all the fluid in my vehicles is by cycling in fresh fluid and pumping out the old. This is done by using the transmission fluid cooler lines. Pump out the old first and then pour in the new. Make sure the level is correct before you start and record how much you pump out.

Replacing all the fluid at once on high mileage automatic transmissions with poor or no prior maintenance at all... is not advised. Clutch packs, seals and other parts will not be able to acclimate to such a harsh change in fluid and then begin to fail. The best you can do in these situations is replace the fluid in increments while working in the new fluid from driving the vehicle.
Rate this post positively Reply With Quote Quick reply to this message
 
Old 01-17-2010, 04:17 AM
 
Location: Tbilisi, Georgia
55 posts, read 220,749 times
Reputation: 38
Quote:
Originally Posted by whiteboyslo View Post
what's the manufacturer's recommended service interval for your vehicle?

as to whether i do it, i did once. it was on the only vehicle i ever owned with an auto tranny that had enough miles to warrant it. i bought it used with TONS of miles on it, so it seemed the prudent thing to do.

i would normally say that at your mileage you should have done this at least once already, but oddly enough i was changing the oil on my wife's Accord today when i got to thinking about its tranny fluid. the car has 45K miles and i was worried i had overshot the recommended service interval. i checked the manual, and it says not to change until 120K!!! then again, it also states to only change motor oil every 10K and the filter every 20K, so it raises an eyebrow to say the least.

like you, i've heard that a flush is generally a bad idea for a vehicle that has gone so long without service. i don't have any personal experience with it, though. as to changing the fluid and filter yourself, it's pretty striaghtforward. you just have to take your time and use a cross pattern when re-installing the tranny pan so you don't get a leak.

Mike
Changing the oil in the transmission or the engine is a matter of different aspects. Even the manufacturer recommend to change engine oil in every 10K miles, you should consider the oil itself, your driving style and the climate in your region.
I like driving on high RPMs, so even though my car manufacturer recommends to change engine oil every 8-10K miles, I have to change it after only 3K miles, as the oil loses its characteristics.

So if you are not interested in mechanics (or just do not know anything about it), listen to the engine. If the engine noise is louder as it was, or some kind of low knocking noise is added to the usual one, or if the oil level is lower then it should be, you should change it. I change the oil filter every time I change the oil, as it costs $5 here and does not make any major difference.

The same is with the transmission fluid. Driving style and climate may influence on the liquids characteristics in both, good or bad way. So it is better to check all the fluids in every 20K miles, just to be confident everything is OK

I have Mitsubishi Galant with 2.4L engine and automatic transmission, my father has exactly the same car, even the same color, but I change engine oil i every 3K miles (5000km to be correct) and he changes engine oil in 8K miles. And even after 8K miles his car has a normal engine voice, while my car is knocking noise after 6K.
I changed transmission fluid 40K miles ago, but I think I have to change it in nearest future as the shifting speed slowed down, and he has never changed the fluid, even though both of our cars are second hand and he drives more then I do.
Rate this post positively Reply With Quote Quick reply to this message
 
Old 01-18-2010, 01:38 AM
 
199 posts, read 535,447 times
Reputation: 103
According to the manual, there is no service interval. I'm only supposed to inspect every 30000 miles. It also says to replace or correct as necessary, and two places have told me the atf fluid is dark.

I did find out I'm due to replace spark plugs soon.

Quote:
Originally Posted by whiteboyslo View Post
what's the manufacturer's recommended service interval for your vehicle?

Mike
Rate this post positively Reply With Quote Quick reply to this message
 
Old 01-18-2010, 02:22 AM
 
454 posts, read 590,654 times
Reputation: 211
I've dealt with the whole transmission change/flush issue..and did it myself a couple of months ago because mechanics refused to change it right.

Basically I drained the pan, the differential fluid, and flushed the transmission.

I dont believe flushing is a bad for your transmission...All you're doing is disconnecting the transmission cooling hose, letting it drain into a pan while pouring fluid in until it turns bright red like the new fluid. Takes about 9-10 quarts for the whole job on a 94-96 camry.

I tried telling the guys at the autoparts store, but they tried to get all technical, but I had my instructions from toyotanation.com to help me out.

There's also no 'force' involved in a flush. Its basically the pump pushing the fluid, harmless...
Rate this post positively Reply With Quote Quick reply to this message
 
Old 01-18-2010, 07:54 AM
 
Location: WA
5,538 posts, read 22,618,445 times
Reputation: 6293
I have found that autos can often benefit from a filter replacement and fluid exchange, expecially if the fluid has been overheated. I do that service on my cars about every 30K miles and have never had anything but good results.

The manual transmission in one of my cars is often subjected to high rpm and I have found that a lube change once a year aids shift action and feel.
Rate this post positively Reply With Quote Quick reply to this message
 
Old 01-18-2010, 08:01 AM
 
Location: South Jersey
7,780 posts, read 19,584,871 times
Reputation: 2332
good advise. I change mine in all my cars at 30-50k



Quote:
Originally Posted by Lux Hauler View Post
Technically this is already done if the filter and pan fluid are replaced every 15000 miles or so. That's all that is required to maintain the transmission fluid for the life of it. However, there is hope if you have neglected to do this or acquired a vehicle with no knowledge of it's maintenance history. One of the easiest ways I have been able to change out all the fluid in my vehicles is by cycling in fresh fluid and pumping out the old. This is done by using the transmission fluid cooler lines. Pump out the old first and then pour in the new. Make sure the level is correct before you start and record how much you pump out.

Replacing all the fluid at once on high mileage automatic transmissions with poor or no prior maintenance at all... is not advised. Clutch packs, seals and other parts will not be able to acclimate to such a harsh change in fluid and then begin to fail. The best you can do in these situations is replace the fluid in increments while working in the new fluid from driving the vehicle.
Rate this post positively Reply With Quote Quick reply to this message
 
Old 01-18-2010, 08:06 AM
 
Location: Sacramento, Placerville
2,511 posts, read 5,528,782 times
Reputation: 2252
As a previous poster mentioned, the the only correct way to do this is by disconnecting the cooler line and allowing the pump to cycle fresh fluid through the transmission, then drop the pan and change the filter.

No additives are needed.

Some manufacturers spec that it is acceptable to drop the pan, change the filter, then add enough fluid to replace what was left when you dropped the pan. This IS ok, but doesn't replace all the fluid. I live in an area with a hot summer climate, so I replace all the fluid.

If you have a shop do it and they want to add chemicals, "back flush," or suck the fluid out of the fluid filler tube, go find a place that will do it correctly.
Rate this post positively Reply With Quote Quick reply to this message
Please register to post and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.

Detailed information about all U.S. cities, counties, and zip codes on our site: City-data.com.


Reply
Please update this thread with any new information or opinions. This open thread is still read by thousands of people, so we encourage all additional points of view.

Quick Reply
Message:


Over $104,000 in prizes was already given out to active posters on our forum and additional giveaways are planned!

Go Back   City-Data Forum > General Forums > Automotive

All times are GMT -6.

© 2005-2021, Advameg, Inc. · Please obey Forum Rules · Terms of Use and Privacy Policy · Bug Bounty

City-Data.com - Contact Us - Archive 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37 - Top