Rough shifting...best type of tranny service to do?
Another question on the new car...I drove several automatic Corollas/Prizms and they all shifted pretty smoothly. The one I bought shifts a little rough, sometimes with a slight jolt....nothing to be alarmed about, just a sign that a tranny service is necessary. The fluid is a little dirty, so I am sure it is time.
Question is: What is the best type of transmission service for this car (2002 Corolla, 4-speed auto.)?
Fluid exchange (sometimes called flush and fill)?
Fluid exchange with filter change?
Is draining the fluid from the pan enough ( I am guessing, based on the fluid, that its either been a long time since the tranny was serviced or it never has been)?
Another question on the new car...I drove several automatic Corollas/Prizms and they all shifted pretty smoothly. The one I bought shifts a little rough, sometimes with a slight jolt....nothing to be alarmed about, just a sign that a tranny service is necessary. The fluid is a little dirty, so I am sure it is time.
Question is: What is the best type of transmission service for this car (2002 Corolla, 4-speed auto.)?
Fluid exchange (sometimes called flush and fill)?
Fluid exchange with filter change?
Is draining the fluid from the pan enough ( I am guessing, based on the fluid, that its either been a long time since the tranny was serviced or it never has been)?
Please share your thoughts and experiences...
You can just drain it from the pan. But you can only change about half the fluid at a time with this method, the other half is in the torque converter. One change will get you at 50% new, twice will get you 75% new, three times will get you at 85% new...i would stop there, the next step is only to 92%. Drive a few miles between each change to mix it in.
Changing it 3 times in short order (after driving a few miles of course) is still a lot cheaper than most transmission shops.
I don't think the tranmission has a filter, someone correct me if i'm wrong.
i think the tranny has a metal screen i dont think its a screen that needs to be changed tho
D
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Type T-4 is the best tranny fluid for toyotas....but use what the car recommends also dex 3 > dex2
Use T4 only on newer Toyotas that call for T4. I think their composition is very different from Dexron.
And Dexron 2 and 3 have been superceded by Dexron 6.
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Little Pig - 1999 Corolla LE - Manual Swap - 2001 front end - #138 @ CASC-OR Autoslalom 2012
Big Pig - 1997 Camry LE - need new tires, rear struts and alignment
Skinny Pig - 2010 devinci St-Tropez
How many miles? There has been a lot of discussion on TN about changing auto trans fluid. Flush, pan oil change, high mileage trans and flushing, etc. Might do a TN history search.
Suggest dropping and cleaning the pan and magnets (if so equipped). The filter is screen type and can be washed if necessary. Find out if the trans pan has a gasket or uses just sealant.
Draining the pan gets about 1/3 of the fluid, the rest is in the torque converter. As stated by others, repeated changing can clean up the fluid.
If the dipstick states Dexron, Type III is good enough. Have not seen Type 6 in stores. Don't use T4 if the trans specifies Dexron.
Okay, thanks for the information on the fluid. I will use Dexron 3. The car is a 2002 with just over 100K on it.
Are the shift points adjustable on this car? Or does it have a transmission that "learns" like so many other modern automatics. The reason I ask is that it seems to hold each gear longer than normal, even under moderate throttle, then upshifts fairly abruptly. Under normal-to-light acceleration getting up to highway speed, it won't shift into 4th gear until past 50 mph. This transmission is not as smooth as other automatic Prizms/Corollas I have driven. Definitely seems more performance oriented. It shifts like a Honda or Acura.
Are the shift points adjustable on this car? Or does it have a transmission that "learns" like so many other modern automatics. The reason I ask is that it seems to hold each gear longer than normal, even under moderate throttle, then upshifts fairly abruptly. Under normal-to-light acceleration getting up to highway speed, it won't shift into 4th gear until past 50 mph. This transmission is not as smooth as other automatic Prizms/Corollas I have driven. Definitely seems more performance oriented. It shifts like a Honda or Acura.
The only adjustments you can make is to take up the slack at the kickdown cable, connected to your throttle body. The engine computer controls the shifting here so I like to think that it adapts to some extent. So from what you say, if it still shifts like this a few months later it may have adapted to the way you drive.
Anyway, I think my car (a 99, before I converted it to manual ) shifted into 4th way before 80km/h (50mph).
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Little Pig - 1999 Corolla LE - Manual Swap - 2001 front end - #138 @ CASC-OR Autoslalom 2012
Big Pig - 1997 Camry LE - need new tires, rear struts and alignment
Skinny Pig - 2010 devinci St-Tropez
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) shifted into 4th way before 80km/h (50mph).
Linear Mode
