Hello All,

Seeking the GPM flow rate on a 1996 4R70W.

Thanks in advance.

dhahn... Anchorage

 

Are you talking about cooler flow?

 

Yes on the cooler flow. Last evening when changing oil, the mechanic disconnect the cooler line and run the engine at idle with extra fluid in the sump to flush the converter. He commented that the flow was very very low. In about 3 to 5 minutes at idle 2 quarts was it.

Does the transmission have different cooler flow rates i,e., in netural, driving, converter phase/converter lock-up and overdrive etc?

1996 F150 4R70W

Thanks

 

I have no experience at this peticular situation but 3 min, to flow a quart seems to be low but at idle it is possible.
If your mechanic say it is low, it must be from experience.
Has the transmission been working ok otherwise?
I will be findiing out shortly because I have to do the same thing. No plug in the convertor.

 

Trans is shifting OK except for no OD when cold, shifts into OD about 5 minutes after operation. Changed the Converter at 32K due to shuddering, has 91K as of now.



Thanks!

 

To check proper flow remove cooler line after trans cooler on return side start engine and catch fluid after fluid flows steady with no bubbles, all this is done at idle and in neutral, put hose in container and time for 15 second containe should have 32 ounces of fluid or more.

 

Couldn't have said that better myself

 

On what appears to be low flow:
Convertors with and without drain plugs.
You need to have the pan filled with about 6 or more qts, go through the shifting positions to get that fluid into all areas of the trans.
The convertor holds a lot of fluid so you need to run quite a bit through, to see the flow rate come up to a high flow rate.
The tip off to this is the dip stick level remains high before you get all 13 qts in and meet the correct level.
This tells you that more needs to be let out of the cooler line "if" the convertor has no drain plug. Or the convertor takes a lot of fluid (after draing) before the flow rate comes up.
It's a matter of catching up with the situation.
Alway keep checking fluid level when flushing out of a cooler line or you can over do it and waist fluid unless you have spare qts. on hand.
You need to end up with the hot fluid level in the cross hatch area and a closed system.