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2nd gen auto transmission fluid flow?

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Ed ke6bnl

Ed ke6bnl

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2 hours ago, Mopar1973Man said:

Just Neutral. There is a mod that transmission rebuild can do to make it pump in park as well. The side effect is the torque converter will drain out over night. 

is there simple way to check in what mode the pump is on park or neutral etc. thanks

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notlimah

notlimah

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My valve body is set to circulate in P or N. If you’re valve body has never had work done then it’ll only circulate in N. If you’re unsure, other then cracking it open and having someone who knows look it over, my guess would be to check the trans fluid in P then in N. I think it should be higher in neutral and lower or not register in P.

 

3 hours ago, Mopar1973Man said:

Just Neutral. There is a mod that transmission rebuild can do to make it pump in park as well. The side effect is the torque converter will drain out over night. 

 

Pretty sure the TC drains fluid regardless if the vb mods done or not. With the mod you just don’t have to worry about dropping to N for a few after the trucks sat for a bit before you get going. 

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Mopar1973Man

Mopar1973Man

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1 minute ago, notlimah said:

Pretty sure the TC drains fluid regardless if the vb mods done or not.

 

Stock transmission does not drain back typically. I've never had to wait like now. Every morning I've got to start it wait about 10 seconds before the transmission will do anything. Before it would move instantly after starting. 

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notlimah

notlimah

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I’ve had the exact opposite happen, with a 47re. Completely stock, let it sit for a while, let it sit at idle for a bit, try dropping in D and go, would just rev, eventually catching and going. If I just put it in N for 5-10 seconds then that problem is gone.

 

On my built 47re this problem has never happened.

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notlimah

notlimah

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43 minutes ago, Mopar1973Man said:

@Dynamic warned me about it when he modified the transmission for pump in park. It would drain back overnight. I do notice that the whine of the pump in park is now gone because fluid will flow in park or neutral. Compared on stock it only flows in neutral. 

 

Yea, all I’m sayin is they both drain back.

 

29 minutes ago, dripley said:

Get 6 speed, cant even hear my pump. Kinda like its not there.:whistle:

 

Get outta here you! :shifty:

 

:spank:

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Guest 04Mach1

Guest 04Mach1

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Interesting... I've always wondered why the 01 didn't have OD when very cold. Turns out Chrysler programmed the PCM that way because of fluid flow issues in the OD unit when very cold. I had many of mornings driving I-225 and I-70 wondering what the heck is going on with my transmission.

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