In replacing my radiator, I noticed the tank fittings were 1/2 inch instead of 5/8, looking inside, the opening was roughly 1/4 inch diameter.
I called the distributor, was told not to worry, aluminum is more efficient at cooling. So much for a 'factory fit' replacement.
The transmission is a '66 GM THD 425, and the cooling lines are definitely a higher capacity.
I thought I could laser measure the temp after a run to see if the trans is running hotter then the engine by a significant percentage.
Being ignorant of transmission design, I don't know if this obvious restriction is severe, or if the 'flow volume' of oil is not that great.
It's not that there are load issues.
The question is: should I worry? and/or add an outboard cooler, bypassing the wimpy one?
As always, thanks in advance for you help!
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