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Drain and refill or Cooler line flush? #5219047 09/21/19 05:25 PM
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jrvn Offline OP
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I have a 2013 Tacoma with a 4 speed Automatic trans and has 116k miles on the ODO, ive always done and pan drain and refill every 30k miles but never a full flush out. ive ordered 12 quarts of genuine Toyota t-IV fluid should I just continue on with 4 quart pan drains at 30k and spread out those 12 quarts or is it time to get it all out with a full flush. the trucks a daily driver no towing and the ATF visually looks very good. it takes exactly 4 quarts to pan drain the whole system takes 11 quarts.

Re: Drain and refill or Cooler line flush? [Re: jrvn] #5219094 09/21/19 06:46 PM
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Ursatdx Offline
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WS is the fluid of preference, no?


"If there must be trouble, let it be in my day, that my child may have peace." --- Thomas Paine
Re: Drain and refill or Cooler line flush? [Re: jrvn] #5219110 09/21/19 07:09 PM
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Propflux01 Offline
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Drain and fill as your doing now.


2014 Hyundai Elantra
2014 Hyundai Elantra GT
Re: Drain and refill or Cooler line flush? [Re: jrvn] #5219120 09/21/19 07:18 PM
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eljefino Offline
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Drain and fill. Even if you did the "flush" you wouldn't run it dry, and you'd mix old and new.

Re: Drain and refill or Cooler line flush? [Re: jrvn] #5219136 09/21/19 07:36 PM
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JustinH Offline
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I wouldn't mess with the cooler lines. Less risk of breaking the fitting, etc.

Toyota makes it too easy with the drain plug on these things to do it any other way.


'16 Ford Escape
'11 Scion XB
Re: Drain and refill or Cooler line flush? [Re: jrvn] #5219140 09/21/19 07:38 PM
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cos Offline
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Yep, continue doing the drain 'n fills.


'15 Cadillac SRX
- Castrol Magnatec 5W30
- Valvoline Maxlife ATF





Re: Drain and refill or Cooler line flush? [Re: Ursatdx] #5219149 09/21/19 07:44 PM
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jrvn Offline OP
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Originally Posted by Ursatdx
WS is the fluid of preference, no?

not this one it takes the T-IV

Re: Drain and refill or Cooler line flush? [Re: cos] #5219151 09/21/19 07:44 PM
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jrvn Offline OP
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Originally Posted by cos
Yep, continue doing the drain 'n fills.
that's what am thinking

Re: Drain and refill or Cooler line flush? [Re: JustinH] #5219152 09/21/19 07:45 PM
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jrvn Offline OP
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Originally Posted by JustinH
I wouldn't mess with the cooler lines. Less risk of breaking the fitting, etc.

Toyota makes it too easy with the drain plug on these things to do it any other way.
true it all looks easy on YOUTUBE with my luck i'll break something getting of the AT return line

Re: Drain and refill or Cooler line flush? [Re: jrvn] #5219154 09/21/19 07:46 PM
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Reddy45 Offline
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Is it a 2013 or 2003 Tacoma? No way a 2013 Tacoma would take T-IV ATF.

And you don't need to cooler line flush if you've been doing pan drains every 30K.

Re: Drain and refill or Cooler line flush? [Re: jrvn] #5219371 09/22/19 04:34 AM
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Mad_Hatter Offline
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Originally Posted by jrvn
Originally Posted by JustinH
I wouldn't mess with the cooler lines. Less risk of breaking the fitting, etc.

Toyota makes it too easy with the drain plug on these things to do it any other way.
true it all looks easy on YOUTUBE with my luck i'll break something getting of the AT return line

Dunno about your personal luck but with me it seems if it can go wrong, it will go wrong. Ugh...😠

KISS...keep it simple stupid..I often have to remind myself of this.😂

Re: Drain and refill or Cooler line flush? [Re: jrvn] #5219405 09/22/19 06:16 AM
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Rat407 Offline
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30k draiin and fills, I would say you have one of the freshest transmission fluids around. Most never touch their transmission until it breaks and some only when they hit 100k. That thing will last a long time.


2002 Silverado 5.3 5w-20 AMSOIL
Re: Drain and refill or Cooler line flush? [Re: jrvn] #5219518 09/22/19 08:39 AM
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ZZman Offline
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Since u know the maintenance and have done it regularly why change a good process?


2005 Toyota Avalon XLS 3.5 motor
2014 Ford Fusion 2.5 motor
Re: Drain and refill or Cooler line flush? [Re: Reddy45] #5219562 09/22/19 09:36 AM
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jrvn Offline OP
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Originally Posted by Reddy45
Is it a 2013 or 2003 Tacoma? No way a 2013 Tacoma would take T-IV ATF.

And you don't need to cooler line flush if you've been doing pan drains every 30K.
2013, 4 speed automatic with a dipstick

Re: Drain and refill or Cooler line flush? [Re: ZZman] #5219563 09/22/19 09:39 AM
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jrvn Offline OP
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Originally Posted by ZZman
Since u know the maintenance and have done it regularly why change a good process?
jup I agree, I just wanted a little more input from more experienced mechanics/DIYs about it, the concensus is if im doing regular pans drains at 30k miles the existing ATF should be in relatively good condition and not dirty to the point of needing the whole system evacuated of fluid.

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