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Transmission shifting hard

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Old 06-13-2012, 12:39 PM   #1
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Transmission shifting hard

Okay I have a 2001 3.4 v6 automatic. When drivin it seems to shift fine. But when I'm comin to a stop it's shifts hard back into first right when I'm about to stop. I plan on draining all the transmission fluid, all of it. I'm gonna change the filter in there too. I assume there is one. I don't have an owners manual so what type of fluid should I use. I called Toyota and they said just straight ATF. But my buddies who works at a auto parts store told me in his book it says dextron 3 or mercon 5. Which is it? And maybe some Lucas stop slip as well. Do y'all think this may solve my problem. And have any of you had this issue and what did you do to fix it. Any help is appreciated. Thanks
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Old 06-13-2012, 12:42 PM   #2
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Don't put any thing in it but ATF.

ATF D–II or DEXRONŽIII (DEXRONŽII)
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Old 06-13-2012, 12:45 PM   #3
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Okay so it is straight aft then? I'm just really confusing to me. Sorry for all the questions
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Old 06-13-2012, 12:47 PM   #4
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Yes, just use Dexron III. If you can't find it, use a higher number Dexron like IV or V. It's backwards compatible.

You should only need about 3 quarts since it's just a drain and fill.
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Old 06-13-2012, 12:50 PM   #5
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Fluid can cause hard downshifts or ECM may need to be flashed to restore parameters. Try these if it happens again.
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Old 06-13-2012, 12:51 PM   #6
Yep
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Well what if I want to take it all out? I wanna make sure it's got all the same transmission fluid. And I know the previous owner changed it but I have no Idea what he put in
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Old 06-13-2012, 12:53 PM   #7
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Quote:
Originally Posted by buzzard1992 View Post
Well what if I want to take it all out? I wanna make sure it's got all the same transmission fluid. And I know the previous owner changed it but I have no Idea what he put in
Then it will need a flush, which is best handled by a garage or the dealership.
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Old 06-13-2012, 12:58 PM   #8
Yep
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Quote:
Originally Posted by 98tacoma27 View Post
Then it will need a flush, which is best handled by a garage or the dealership.
Okay yeah that probably would be the best thing to do. I don't run this truck very hard to of caused the transmission to do this. So my guess is it's somethin to do with the previous owner
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Old 06-13-2012, 01:34 PM   #9
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Anyone else have any thoughts on if this transmission flush will cure it or if there is somethin else I should do?
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