Trans flush round no.2

maxspeed96ct

maxspeed96ct

New member
So I did a trans flush about 2k ago. Installed my new radiator at the time and a trans cooler. Did the full 16 bottle flush with synthetic fluid.

It just didnt feel good though, trans didnt like the fluid. It had a bigger delay between shifts and once or twice on a cold start it gave me a delay going into first if i didnt a rolling stop and then it would catch and slam slightly.

So yesterday I went to napa and purchased a reg non-synthetic valvoline dex iii fluid. Did another 16 bottle flush

And wow does the car shift much better, seems to shift faster yet smoother. Doesnt feel like as much of dog anymore either.

Not sure if its cause im at 125k or its our trans just didnt like the synthetic fluid.

Anyone else have any issues aswell ? just wondering.
 
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I've had no problems with Dex VI which I believe is called a syn blend.

What syn were you using?
 
I'm running conventional right now, though I am experiencing a lot of granny shifting lately, mainly between 2-3rd gear.

Maybe I should do one of these flushes. It hasn't been near the life expectancy of my fluid, but you and I share transmissions and I would like to see improvement in mine.

Anyone know about other things like Mercon and stuff that are available in ATF? I have Dextron 4 with Mercon available at work so I'd consider a flush if it's useable.
 
COB I do all my fluids in AMSOIL they are pricey as hell but def. worth it and I recently switch my gf celica fluid over to AMSOIL and hers seems to shift a lot smoother. I recommend doing this to all vehicles only b.c AMSOIL is one of the few brands that has true synthetics. Plus you can always go on A/O website and check the recommended fluids for your vehicle or talk to customer service as well
 
This might be slightly unrelated to the topic but I was told by multiple shops not to change out my transmission fluid. Reason being that it's been 120-150k miles since it was last done. They said it could do more harm than good. Can anyone vouch for this?
 
josh.bunch said:
This might be slightly unrelated to the topic but I was told by multiple shops not to change out my transmission fluid. Reason being that it's been 120-150k miles since it was last done. They said it could do more harm than good. Can anyone vouch for this?
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From what I understand, a transmission fluid flush could do harm on a transmission whose fluid has not been changed in a long time. Reason being that the act of flushing the trans could stir up gunk and debris that has settled in there, which could clog small passages, etc. in the trans. Some have had problems, while others have been perfectly fine doing this.

A transmission fluid drain and refill will definitely do no harm. However, you will only get a few quarts out of a drain and refill.
 
so what are our options for us high milage guys? i just purchased my runner couple months back and its got 180,000 miles and im not sure if tranny has been flushed. was going to do it myself but not if theres a possibility of me harming the truck
 
Tucson4runner said:
so what are our options for us high milage guys? i just purchased my runner couple months back and its got 180,000 miles and im not sure if tranny has been flushed. was going to do it myself but not if theres a possibility of me harming the truck
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Do a drain and refill. This will not harm your transmission. The only downside is that you will only get around 4 or so quarts of fluid out (I think the total amount of fluid in the system is around 15 quarts). Mine isn't high mileage, but I did a drain and refill about a year ago and no problems thus far. I also changed the filter screen and cleaned the magnets while I was at it.
 
thanks. im sure there is a writeup somewhere on here that i can find. is there anyway i would be able to do a complete flush or is that long gone?
 
Why not do the drain & fill, then pull the trans cooler line and crank the engine until you get a quart or so out, stop, then replace a quart and keep doing that until you see the fresh fluid coming out?
 
Nunyabiz said:
Why not do the drain & fill, then pull the trans cooler line and crank the engine until you get a quart or so out, stop, then replace a quart and keep doing that until you see the fresh fluid coming out?
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Right, this does the complete job of a "flush" by essentially draining and filling the entire trans, so it is the best of both worlds. I know there is a write-up on it in here somewhere. When a shop offers to flush your trans, it is usually using some kind of chemical agent or adding pressure to the system. The flush write-up on these boards doesn't do any harm to the transmission.
 
Nunyabiz said:
Why not do the drain & fill, then pull the trans cooler line and crank the engine until you get a quart or so out, stop, then replace a quart and keep doing that until you see the fresh fluid coming out?
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Ya that's exactly what I did. Got just over 3 quarts from the drain. And then it took another 12-13 bottles to get good looking fluid the first time I did the flush.

2nd time around the fluid looked good but I still did the same amount of bottles.
There's a write up kickin around some were I just don't have the link saved.
 
I know in the write up they say to only drain out a quart shut the engine off add a quart and repeat. Could you set up like an iv drip of ATF into the return line and run a gallon through at a time? Or would this add pressure to the system that shouldn't be there?
By IV drip i mean take a gallon container of ATF, attach the opening to the return hose and turn the container upside down and secure it above the transmission so there is a constant positive pressure pushing the fluid into the transmission.
 
Wow. You guys are way above my head. I think I'll just ride this transmission until it poops out on me and then get a 5 speed.
 
99runnerwa said:
I know in the write up they say to only drain out a quart shut the engine off add a quart and repeat. Could you set up like an iv drip of ATF into the return line and run a gallon through at a time? Or would this add pressure to the system that shouldn't be there?
By IV drip i mean take a gallon container of ATF, attach the opening to the return hose and turn the container upside down and secure it above the transmission so there is a constant positive pressure pushing the fluid into the transmission.
Click to expand...

I've been thinking the same thing, is there a way to setup a gravity feed in and then hook up a line out into a 5 gallon bucket?
 
The reason i ask is i just order the B&M 70264 and want to do a full flush before hooking it up.
I think it would be fairly easy to hook up the gravity feed, wouldnt be anything pretty but would work. Just if any one knows a reason it could cause a problem id like to know before i try it.
 
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