Re: [diesel_mercedes] Re: how do you say quick? backflushing

 

> Yea, what about this "backflushing" thing we hear about now. I am

> fairly new to automatic transmissions. My Subaru is a auto and I'm wondering
> about this in lew of changing the filter. Also isnt it true on some cars(most)
> you can't even get all the old oil out of the trans. The Mercedes has a plug
> to pull on the torque converter, so if we drain that and the pan do we get most
> all out? But what about cars that dont have those drains? Max

I think it really varies from one make to the next.  I have a 2005 Honda Odyssey van, which has a transmission drain plug (but not a filter!!).  Despite having a drain plug, there are so many nooks and crannies in the A/T that draining it out by the plug only empties a little over half of the fluid. 

The official Honda procedure is to drain and fill, run it a little, and repeat three times.  So at the end you have 7/8ths new fluid (or 15/16ths new fluid; I forget if you do three or four drains/refills).  Seems like an odd design to me, but that's what is in the factory manual.

- Alan

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