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The mkiv Supra Owners Club

Automatic Transmission Questions


Big Mark

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I heard to do a full flush you had to fit some form of positive pressure pump?
Not needed. You just disconnect the appropriate hose from the transmission cooler, direct it to a container, run the car until a litre or two of fluid has been pumped out, pour the same amount of new fluid in from the top, then repeat until the new clean fluid is coming out.
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That sounds like something I should do soon then. Without trying to sound stupid but where is the pressure coming from to force it out? Does it have an electric pump or is it working off pressure created from being in a gear and the gears rotating? I probably shouldn't ask and just accept it will work haha

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The pump in the gearbox still works when the box is in park or neutral.

 

The only problem is that it can get a bit expensive. :) There's a video on YouTube of a Soarer TT flush that took 22 litres of Type IV before it came out red rather than dirty brown.

 

EDIT. Thinking about it, I suppose it would be better to leave the cooler inlet pipe connected, disconnect the cooler outlet, and put put a pipe on the outlet, so that the cooler is flushed as well.

Edited by garethr (see edit history)
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The pump in the gearbox still works when the box is in park or neutral.

 

The only problem is that it can get a bit expensive. :) There's a video on YouTube of a Soarer TT flush that took 22 litres of Type IV before it came out red rather than dirty brown.

I have a receipt that came with my car that shows gearbox, axle and brake fluid change at a whopping £89.54 ......£22.21 of which was spent on fluids........I doubt very much that they were as thorough as the soarer flush !!!

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I have a receipt that came with my car that shows gearbox, axle and brake fluid change at a whopping £89.54 ......£22.21 of which was spent on fluids........I doubt very much that they were as thorough as the soarer flush !!!

 

Sounds like they just topped up, or at most changed just 2 litres in the gearbox, not a full flush.

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