Automatic Running Hot - Any suggestions? (1 Viewer)

[Splash]

1973 FJ40
New stock radiator
Electric fan
302 V8
C4 3 speed auto with trans cooler mounted above rear axle
Orion T-case
488s
35" mud terrains
About 3,000 rpm at 60 mph

Around town the engine runs at normal temp (about 2/3 on stock gauge) and transmission runs under 210. All is good.

When heading up grades going to the mountains the engine heats up to about 3/4 on the stock gauge and the transmission heats up to 230-240 and pumps fluid out the vent (may have been over filled). This was on a cool day with outside temperature around 60.

I need to find a way to keep them cooler and am considering a new aluminum radiator with built in trans cooler from Advance Adapters. Has anyone had any good or bad luck with this approach?

Any other helpful hints would be appeciated.

 

[lone gunman]

ever thought about putting the cooler in front of the radiator ? and what kind of electric fan ? is it a ford taurus fan ? if not you may want to consider one. and how old is the factory radiator and what kinda shape is it in ?

 

[Michael Hanson]

Are you sure you got all the air out of the cooling system? Mike

 

[Poser]

When heading up grades going to the mountains the engine heats up to about 3/4 on the stock gauge and the transmission heats up to 230-240 and pumps fluid out the vent (may have been over filled). This was on a cool day with outside temperature around 60.

Have you driven it since and what happened?

 

[Splash]

Thanks for the responses.

Have you driven it since and what happened?

This trip I referenced was to Tahoe yesterday. I have driven it today and no problems. We are heading back up the summit home this afternoon,.

ever thought about putting the cooler in front of the radiator ? and what kind of electric fan ? is it a ford taurus fan ? if not you may want to consider one. and how old is the factory radiator and what kinda shape is it in ?

We are probably going to install a larger radiator from AA with a trans cooler which will move it up front. I do not recall the manufacturer of the fan but it pulls a ton of air. The radiator was new last year.

Are you sure you got all the air out of the cooling system? Mike

Not sure but this is an on going problem so I don't think that is the culprit.