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Transmission oil Leaking after freeze

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6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis

Transmission oil Leaking after freeze

 
  #1  
Old 02-14-2018, 12:13 AM
estatevm
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Transmission oil Leaking after freeze

Hi,
I have an 08' 6.4 with about 125k miles on it. Never had any issues with the transmission until recently. About a month ago after a freeze I noticed trans oil puddled under the trans, and all over the trans pan. I cleaned it off, checked the transmission oil level and ran the truck but it wouldn't leak anymore. Since then I have been using the truck every day for over a month with no leaks ( I check every morning and evening). Then this morning I noticed the same issue- trans fluid all over the trans pan and puddled under it. This morning was also the only day since the last time I saw trans fluid that it froze overnight. I am thinking that the seal on the trans pan shrinks when it freezes and allows the fluid to leak until it warms up.??? Could this be the issue? Has anyone had a similar problem< or does anyone know if replacing the pan seal would help? Thanks in advance
 
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  #2  
Old 02-14-2018, 09:01 AM
DieselDenny
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You can try to retorque the pan bolts a little. Very little! See if that helps.

A good surgical cleaning is necessary to find the point of the source leak.

If you haven't had the trans serviced, probably a good time for filter/gasket change and a flush.

Denny (Way up north and never saw this happening due to weather)
 
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Old 02-14-2018, 09:23 AM
estatevm
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Transmission oil leaking after freeze

Thanks Diesel Denny! I will try tightening the bolts and see if that helps. I believe we serviced the trans around 100k but I will check and see. If we have not serviced it, is this something that is somewhat easy to do? Meaning could I do it myself? I do basic work on our vehicles oil changes, brakes, ect. It is a fleet vehicle and it really sets us back if it has to go to the shop, so I was hoping it would be something I could do on Saturday. Thanks again
 
  #4  
Old 02-14-2018, 10:55 AM
DieselDenny
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Piece of cake for a weekender.

Like I said, clean it up first and snug em up but don't go crazy or you'll risk squeazing the gasket.

If it returns, youtube the procedure on pan and gasket.

Pretty straight forward.

I advise as always, use OEM materials only.

Denny
 
  #5  
Old 02-14-2018, 08:06 PM
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Agree 100% with Denny on the OEM materials. You have a good theory there with the gasket. I've got 121k on my 2010. Just had the complete trans-flush/filter done at Ford. Haven't had any issues with trans fluid leaks yet. I'm down in Houston TX though...don't see many temp fluctuations into the low 30s.
 
 
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