Trans temp issues on my move
Posting Guru
Joined: Feb 2005
Posts: 1,319
Likes: 1
From: Oregon
Trans has been holding solid temps for the past 2 days. Moving from Alaska to New Mexico. It must have just been the -40 that my truck didn't like that morning. We're in Fort Nelson, British Columbia, Canada now. Pulled some steep grades up and down all day today and trans never got over 130.
Lead Driver
Joined: Jan 2007
Posts: 6,708
Likes: 5
From: Kiowa CO
Thread Starter
|
Laughing Gas
Joined: Mar 2007
Posts: 898
Likes: 23
From: Tucson
Mark, that makes a lot of sense about it gelling. I'm sure that's what happened.
Miller and Chris, thanks guys I appreciate it! I think we're probably going to go the scenic route, down through McMinnville to see the aviation museum then head down 101 all the way down the California coast.
Miller and Chris, thanks guys I appreciate it! I think we're probably going to go the scenic route, down through McMinnville to see the aviation museum then head down 101 all the way down the California coast.
Mountain Pass
Joined: Mar 2010
Posts: 183
Likes: 27
From: Northern CA
Mark,
Is it correct to say the bypass works by pressure (not really temp) and when the oil is hot the pressure is less so the bypass closes and the oil goes through the coolers. And when the oil is cold the pressure is higher and the oil pushes the bypass open to let the oil shortcut to the return to the transmission through the same port but bypassing the coolers.
Is it correct to say the bypass works by pressure (not really temp) and when the oil is hot the pressure is less so the bypass closes and the oil goes through the coolers. And when the oil is cold the pressure is higher and the oil pushes the bypass open to let the oil shortcut to the return to the transmission through the same port but bypassing the coolers.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,717
Likes: 2,642
From: SE Florida
No, that's not right. The bypass only opens when the coolers are plugged. There is no temperature effect, other than if it gets cold enough the air to oil cooler will plug with gelled ATF.
The bypass works only on pressure. It was not designed to bypass the coolers to help warm the trans. It is only there to keep ATF flowing to lube the rear of the trans if the coolers are plugged.
The bypass works only on pressure. It was not designed to bypass the coolers to help warm the trans. It is only there to keep ATF flowing to lube the rear of the trans if the coolers are plugged.
Mountain Pass
Joined: Mar 2010
Posts: 183
Likes: 27
From: Northern CA
No, that's not right. The bypass only opens when the coolers are plugged. There is no temperature effect, other than if it gets cold enough the air to oil cooler will plug with gelled ATF.
The bypass works only on pressure. It was not designed to bypass the coolers to help warm the trans. It is only there to keep ATF flowing to lube the rear of the trans if the coolers are plugged.
The bypass works only on pressure. It was not designed to bypass the coolers to help warm the trans. It is only there to keep ATF flowing to lube the rear of the trans if the coolers are plugged.
Thank you.
I guess I was close but now I know.
