Transmission Oil Flow Direction & Pneumatic Flushing
01-10-2013, 04:24 PM
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Transmission Oil Flow Direction & Pneumatic Flushing
Please don't shoot me if I should not be posting this here. I did post it on the problems and fixes forum.
Got 2 questions:
1) What direction does the oil flow through transmission? Does it flow from line through external cooler filter, into the tranny or is it the other way around (from tranny, into cooler filter, into line)?
2) Can I pneumatically flush the old fluid and have good results? If so, where do I input air pressure? Should I apply it into the line that attaches to cooler or should I apply it where the external cooler filter screws into tranny housing?
Here is my thinking: My wifes 2001 Acura CL Automatic Transmission was replaced under warranty at 50K and what is in it now is a BGFA tranny. Bought this car used and was not aware of this until a few days ago when I called dealer and provided VIN. Anyway, not sure when oil was last changed but after having light come on a few days ago (Code P0740), I decided to do a fluid flush and replace external cooler filter as well.
Pulled the external filter off, the fluid is dark and I'm concerned of possible overheating issue. I am wondering that if there is a build up of material on the INTERNAL filter, then perhaps by applying some air pressure (probably a low pressure) through the lines, opposite of fluid flow, it may cause some of the material (if any) that has accumulated on the filter to dislodge and fall into fluid, which will flow out when I drain it.
Just trying to think of ANYTHING I can that may help my efforts to get this light to go off, which I would assume is from low fluid flow, yet I don't want to do something that may cause further problems.
Any thoughts or suggestions?
Got 2 questions:
1) What direction does the oil flow through transmission? Does it flow from line through external cooler filter, into the tranny or is it the other way around (from tranny, into cooler filter, into line)?
2) Can I pneumatically flush the old fluid and have good results? If so, where do I input air pressure? Should I apply it into the line that attaches to cooler or should I apply it where the external cooler filter screws into tranny housing?
Here is my thinking: My wifes 2001 Acura CL Automatic Transmission was replaced under warranty at 50K and what is in it now is a BGFA tranny. Bought this car used and was not aware of this until a few days ago when I called dealer and provided VIN. Anyway, not sure when oil was last changed but after having light come on a few days ago (Code P0740), I decided to do a fluid flush and replace external cooler filter as well.
Pulled the external filter off, the fluid is dark and I'm concerned of possible overheating issue. I am wondering that if there is a build up of material on the INTERNAL filter, then perhaps by applying some air pressure (probably a low pressure) through the lines, opposite of fluid flow, it may cause some of the material (if any) that has accumulated on the filter to dislodge and fall into fluid, which will flow out when I drain it.
Just trying to think of ANYTHING I can that may help my efforts to get this light to go off, which I would assume is from low fluid flow, yet I don't want to do something that may cause further problems.
Any thoughts or suggestions?
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