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 Post subject: Re: Anyone replaced their transmission drainback valve?
PostPosted: Sat Oct 05, 2013 10:29 am 
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x2 tjkj2002 kind of....perhaps alternate wording from the ASTG book on the transmission will help....quote
"Cooler Filter Bypass Valve" unquote. By the way correct torque for the little booger is 11.3 Nm (100 in lb)
and as Papa said (and this is why I include a "kind of" above) - it is a separate valve with a separate purpose - by the book.
Stress one more point per the book DO NOT OVERTORQUE!


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 Post subject: Re: Anyone replaced their transmission drainback valve?
PostPosted: Sat Oct 05, 2013 1:19 pm 
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Auberon wrote:
x2 tjkj2002 kind of....perhaps alternate wording from the ASTG book on the transmission will help....quote
"Cooler Filter Bypass Valve" unquote. By the way correct torque for the little booger is 11.3 Nm (100 in lb)
and as Papa said (and this is why I include a "kind of" above) - it is a separate valve with a separate purpose - by the book.
Stress one more point per the book DO NOT OVERTORQUE!


So which valve causes the "slow to engage" symptoms?

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 Post subject: Re: Anyone replaced their transmission drainback valve?
PostPosted: Sun Oct 06, 2013 2:11 am 
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I'm bound to be roughed up on this one but according to some it is the valve being discussed in this thread but it has always been my experience that any automatic will drain out of the torque converter when left to stand - no matter how good the valves are.
Seems to me that it is more a function of the condition of the fluid than the function of the valve.

Watch that explode mate - not aiming at being provocative but when the valve AND the fluid are change at the same time - offering some reconditioning of the fluids overall properties - how on earth can you isolate the valve as the culprit.
It could only be defined if you did the valve and tested then put it all together and then repeated comparing to replenishing with new fluid. Who, in their right mind would go to that trouble to answer a question? and a one off example never proves a case.
I think much of this is based on supposition.


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 Post subject: Re: Anyone replaced their transmission drainback valve?
PostPosted: Sun Oct 06, 2013 3:27 pm 
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It is just a nuisance, not a real big problem. The 05 CRD I just got does the drain back after setting for a couple of days. I just crank it up, place the shifter in neutral for about 15 seconds and then place in drive and on my way with no hesitation.:D
I am already accustom to this due to owning two Dodge trucks, one a diesel and one a 360 gasser and both will drain back after setting for a couple of days. The Dodge diesel transmission has been into twice for broken parts and on its third torque converter now a Suncost TC which is holding up well (to much torque :lol: ) My good friend and local transmission shop owner told me about the put in neutral trick and it works... If I go into the CRD trans pan for a filter change, I will replace the back-flow valve, until then, use the neutral trick.... :wink:
ps; He stated what is draining back is the fluid in the trans cooler and cooler lines to/from the cooler. The hesitation is the pump charging all of the lines and cooler system back up to pressure with cold fluid and it takes a few seconds. Apparently a common issue on Chrysler Dodge Jeep products....
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 Post subject: Re: Anyone replaced their transmission drainback valve?
PostPosted: Sun Oct 06, 2013 7:50 pm 
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WWDiesel I thought it was a normal thing too & not an issue. I've driven the same way you describe with all my vehicles - just a warm up to get the fluids around everywhere they should be and a little listen to her for anything odd but then the Torqueflite 6 taught me much. It happens with many tractors too.

If it were immediately after a run I would worry.
Cheers.


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