Operating Temps.....can it be to low?
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Junior User
Joined: Jun 2004
Posts: 53
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Operating Temps.....can it be to low?
Hi All..........
I have a 1976 F250 2WD. I am undergoing a project and have a few questions.
First here is what I am doing. I have a new aluminum cross flow radiator with dual electric fans. I also have routed the trans fluid lines to thier own cooler with an electric fan pulled off an import. Both have therm. cotrols to set operating temps.
My question is "Is there a temp that the Trans oil should be for perfect operating condition"? I find a lot of TOO HOT listings in books but no body says what the operating temp should be, if any. I guess same with the engine. If you can keep it cool how cool should you keep it?
Thanks
I have a 1976 F250 2WD. I am undergoing a project and have a few questions.
First here is what I am doing. I have a new aluminum cross flow radiator with dual electric fans. I also have routed the trans fluid lines to thier own cooler with an electric fan pulled off an import. Both have therm. cotrols to set operating temps.
My question is "Is there a temp that the Trans oil should be for perfect operating condition"? I find a lot of TOO HOT listings in books but no body says what the operating temp should be, if any. I guess same with the engine. If you can keep it cool how cool should you keep it?
Thanks
Fleet Mechanic
Joined: Feb 2006
Posts: 1,776
Likes: 5
From: Lorain County, Ohio
Basically the trans should kept as cool as possible. Without extreme measures, 180*F is about right. Cooler than that also has drawbacks I'm told, but I've never seen a tranny fail because it was under-heated. The trick is to not "overcool" the engine in the process. The engine lives best at about 210*F. (I know this is debatable, I'm talking in general). In some applications this can be a real balancing act. The idea is to get as close as possible without going to extremes on either component. Both generate lots of heat that needs to be dissipated. The tranny prefers less heat, the motor prefers a little more.
Senior User
Joined: Oct 2005
Posts: 174
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From: brooks a.b.
the only problem with to low of temp i have seen is in the winter when a cooler freezes of and blocks oil flow for the tranny. i believe ford has a fitting called a "h" valve that allows the fluid to bypass the cooler if this happens.
