Curious here,

whats stopping me cheating with this and just draining out the old fluid and pumping in the exact same quantity that was drained?

Surely mathematically this should be okay?

I've done a fluid change on a BMW sealed ZF tranny, that was a piece of cake, just pump the fluid in, keep an eye on the temp with my diagnostic tool, and just pump it till it starts dribbling out. Start the engine, undo the plug, keep pumping till it dribbles out whilst keeping an eye on the temp.

However , this Lexus doesn't sound as straight forward as the from what I have read, you check the tranny level using the plug on the drain pan, not on the side of the transmission?

 

Not sure the transmission in your car is this way but..................

Some Toyota transmiisions with the ws fluid there is a drain plug, behind the drain plug there is a tube that extends up into the transmissision. the tube length sets the fluid level as it is an overflow.

To drain remove the plug, no fluid or not much comes out. remove the tube assembly, now the fluid will drain. replace the tube and fill by pumping fluid in the upper fill plug, until it over flows the tube, replace plug.

May be a special tool or gasket needed not sure.

Your transmission may have an overflow on the side of the transmiision instead of the tube in the pan, I described. not sure.

It can be done though, just need to search around some I would think.

Remove the fill plug first though, to be sure you can put the fluid back in.

 

Indeed there is a tube etc on the bottom and then on the side there is the fill plug.

I wasn't aware that tube can come out though! How does it come out? I thought it would have been physically attatched to the pan.

That aside I may drop the pan to clean it anyway.

Originally asking though, mathematically I can't see why I cant measure how much I get out of the tranny, and put back in the exact same amount.`

 

The tube is threaded at its base and can be removed after the drain plug is removed.

Sorry I can't give more info on this, I just don't remember exactly what it was I read.

Additionally it was for an ES350 which may just be giving bad info to you about yours even if I could recall it all correctly.

Only thing that I would say about refilling it with the exact amount is.......... what if it were low to begin with?

I know nothing about the condition of, or mileage on your 430, so I will ask why are you wanting to do this?

 

LS430 2004 80k.

Why wouldn't you change the transmission fluid :/

All of the, if its too late its knackered and will shift debris is just plain garbage.

IF your transmission dies after changing it's fluid then it didn't have long to go anyway.

Some fresh fluid will hurt nothing but just makes sense to do.

Also some miles , like 1-2000 have been used for towing.

 

www.transdetail.ru/assets/site/files/A-761E.pdf

https://www.clublexus.com/forums/ls4...d-04-06-a.html

PAGE 6, Shows a drain plug and an overflow plug.

 

What is "ws"?

 

...prolly World Standard ATF.

 

I have done a couple of drain and fills on my 2005 LS 430.

 

Hi chris,

what was your method, did it involve dropping the pan?

I will probably drop the pan at this rate tbh.

Then do another fchange a couple of weeks later.

 

Actually Chris,

My main question is filling the car and checking the overflow tube, is it done with the engine running or with it off?

 

I did it with engine off. I put what I took out back in. Measure what comes out

 

Im planning on doing the engine running way whilst measuring the temp with my techstream.

However, the air suspenison needs tp be turned off no? As the car will be on a 2post lift...

 

I'm just curious as I come from BMWs.

For the newer sealed transmissions, for those who don't utilise flush machines and prefer the old fashion drain the pan etc.

Do those who do the above, after you've removed the drain plug and drained all the ATF, do you guys do the 10 second engine trick of starting the engine and allowing the torque converter to pump out a little extra fluid.

Usually you get some more fluid come out of the drain plug....

This works fine on BMW transmissions that I've done and I don't see why it wouldn't work on this Aisin world standard ones.....

However it's only 7-10 seconds you run the engine..