Change transmission fluid in an old car?

Asked by Bill Dec 18, 2016 at 11:56 AM about the 1965 Ford Mustang Convertible RWD

Question type: Maintenance & Repair

I have a 1965 Mustang with an automatic transmission. I want to change the
transmission fluid, but I'm reading conflicting information about whether or not
it is a good idea; essentially that it can disrupt the natural balance of things by
cleaning out residue. Any thoughts?
The transmission fluid level is low after replacing the radiator, so at a minimum
I need to add some, which would be mixng new fluid with old.

2 Answers
157,445

Bob answered 7 years ago

Change it, but make sure the correct fluid is used on the refill.

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F_O_R answered 7 years ago

New fluid won't hurt anything so change it and the filter if there is one.

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