[Chrysler300] RE: Torqueflite leak question

["Gary Nelson" <gnelson@xxxxxxxxxxxx>]

I rebuild the CI TF's. I would like to clarify the remark on the O-ring seal. That ring fits onto the pump drive sleeve and fits into the ID of TQ. As the tangs of the pump drive sleeve lock into the TC, it rotates with the TC, that ring is static in the bore. With age and heat, that O-ring will become stiff and brittle, that will contribute to TQ drain down. What was not mentioned, the input shaft that engages the stator in the TC has 2 steel seal rings that ride in the ID of the reaction shaft bore. TC oil has a direct path back to trans pan. Depending on age and service those rings can have sever wear.  As far as O-ring "not fit properly", the correct size will due the job. There are re-builders who do not know where the correct seals are located. The Service Manual does not give you that info, you  must have a seal placement chart for the trans being rebuilt. May chart is at my shop 600mi from me. When I retrieve it, I can scan and e-mail anyone that wants it.     
The front seal is usually the culprit for a leak below the bell housing. I would eliminate all other potential leak points before pulling the trans to replace front seal. Front seals must be the high temp silicone, orange color.
I highly recommend following the service manual to bring the bell housing alignment and TC stub run out to spec. Not correcting run out allows the TC hub to rotate in a oblong pattern. One hr at 3000 rpm = 180,000 revolutions and 10 hrs = 1,800,000 revs. That is why the front seal will fail prematurely.

Thank you,
Gary, the parts doc

Mail: garythepartsdoc@xxxxxxxxxxxx










  -----Original Message-----
  From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx]On Behalf Of retromobilia@xxxxxxxxxxx
  Sent: Friday, March 16, 2012 5:05 PM
  To: Terry Mctaggart
  Cc: Chrysler300
  Subject: Re: [Chrysler300] Torqueflite Question


    
  Yes, they are related. The O-ring seal for the T - Q even in newly rebuilt units does not fit properly. (It is not clear if the O ring id is off [due to China manufacturing] or if the shaft is worn just enough), To allow the leak down after some undetermined period of sitting. 
  The fluid usually residing in the T Q now will fill (or more properly over fill) the sump of the tranny. When this occurs fluid will find one of several ways out; Usually the dip stick tube./ Since this has happened to me in several brands of trans' and cars I am lead to believe it is not the O ring but the ware. This could be eliminated if someone would find out how to replace the standard spec O ring with one just a slight bit more fat on the I-D. 

  J D Jung 
  Retromobilia.net 

  ----- Original Message -----
  From: "Terry Mctaggart" <terrymct999@xxxxxxxxx> 
  To: chrysler300@xxxxxxxxxxxxxxx 
  Sent: Friday, March 16, 2012 10:57:18 AM 
  Subject: [Chrysler300] Torqueflite Question 

  My 300F tranny experiences the not-uncommon problem of torque converter drainback, where it may take 15 or 20 seconds to engage, after the car has set for several days. The transmission also leaks, seemingly from the area of the front seal, also after setting for several days. Are these two problems related? Terry McTaggart in springlike Dayton Ohio. 

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