1947 Dodge fluid drive

[Johnboy]

Hi Marc did you have to buy a 5 gallon pale. Still waiting for my friends back to get better so I can check his fluid drive.

[James_Douglas]

On 8/17/2021 at 11:39 AM, Dodgeb4ya said:

I have never changed the fluid in any of my Chrysler 8 cylinder FD cars.

I've also never ever had a failure in any of said couplings.

I've owned these cars over 40 years. 

Now... I do service engine oil, auto trans, brake and coolant fluids more often than most people.

 

 

Some people go for decades without changing the fluid and the cars go down the street. Of course the science is hard and clear, that as the anti-foaming agents break down the efficiency of the units go down with it. A little more gas on the pedal will make up for it and unless you have it on a dyno or log fuel use you may not notice it.

 

On the Suburban with its weight and only a six cylinder it is very noticeable when I changed the fluid.  On my convertible I did not.

 

Do remember that past performance is no guarantee of  performance. The o-rings made it though 10 launches before the Challenger blew up. They to said it has worked and should work going forward....they were wrong.

 

I know of a shop here in SF that works on old cars. They have called me three times in the last 20 years about fluid couplings that failed. All with bearing issues.  Now these cars were driven by people like me here in and around San Francisco on a daily basis. Lots of hills and lots of highway use.

 

MTBF all depends on the use and the environment.

 

 

James

 

 

[Dodgeb4ya]

Fluid couplings should not be driven on the hills in San Fran....too hard on them evidently..

As to why the shop calls you to tell you of coupling failures....maybe they are

Wanting to rebuild your couplings. IDK.

Glad my couplngs work as they should...smooth old and leak free and with 70 year old OE fluid to boot.

I drive my cars...don't fret about fluid drives coupling oil.