Auto Transmission fluid

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ir3333

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Would you re use your auto transmission fluid if it was only in the car for 3 years, is clean and only has about 2 or 3 thousand miles on it?
...and how about the anti freeze also?
 
Why is the tranny fluid out of the transmission?
Is this your beater ride or your classic car?
Why did you drain the antifreeze?
Do not be a tight A_ _ !!! Called pay me know or pay me latter.
 
So, NEW MOTOR, NEW TRANSMISSION, Why did you even post this question.
Please read my last sentence in post #7
 
Not saying i would or wouldn't but nobody changes their transmission fluid and anti freeze for 50,000 - 100,000 miles?
 
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I think you might be asking two different questions. Question #1 "Can" you reuse old fluid that doesn't visually show the fluid as being degraded in its protective properties? Question #2 "Would" you reuse old fluid that doesn't appear to be contaminated? First answer. You could. But, visual inspection is really only a very minuscule part of what really going on with the protective properties. There is thermal and chemical breakdown, moisture contamination just to name a couple. The fluids are there to protect your investment. If you don't value the item you are protecting much.... Answer to #2. No I would not reuse transmission fluid on any level. Anti-freeze I have been known to reuse in a lesser vehicles. Like changing the really old out with just the old anti-freeze in my tractor. The fluids in question are not that expensive. It's not worth the risk IMO just to save a few dollars.
 
Replace fluids with New!
Unless you can guarantee there is zero contaminants in fluids that have been sitting for 3 years. Who knows what has been absorbed or settled into them?
 
No I would not re-use the fluids.It may look clean but put it next to new fluid and I bet it looks dirty and There could be fine particles in there.Will it be fine reusing it probably yes but why not just run new fluid.
 
if I needed to drain the rad fluid to replace a thermostat AND the fluid was relatively fresh I would reuse it.

The OP said the rad fluid was 3 years old.
As others have noted there was no talk as to why the fluid was drained, has slot to do with the answer.

But 12.00 for a gallon of 100% rad fluid (@ 50/50 is 2 gallons) is cheap insurance.

Trans fluid I would always replace.
 
if I needed to drain the rad fluid to replace a thermostat AND the fluid was relatively fresh I would reuse it.

The OP said the rad fluid was 3 years old.
As others have noted there was no talk as to why the fluid was drained, has slot to do with the answer.

But 12.00 for a gallon of 100% rad fluid (@ 50/50 is 2 gallons) is cheap insurance.

Trans fluid I would always replace.

I will be draining to install new engine and new transmission.
now i'm going to play the devils' advocate here.Changing these fluids after only 3000 miles is accepted as cheap insurance...so do you guys change your coolant and auto transmission fluid every 3000 miles?
 
After only 3000 miles the coolant and transmission fluid is OK to leave there for 50.000 more miles.
But if you remove it...it is unsafe to put back in?
 
How about do this? Maybe some other members will agree with me and not give there personal long stories.
Change the antifreeze every three YEARS and forget the mileage.

Change the transmission fluid about every five years. Your are not driving it that much. Remember that if the converter does not have a drain plug that you are leaving about 3 quarts of old fluid in there. Also pull the transmission pan any time the fluid turns to a brown color. If it does turn brownish just plan on pulling the transmission.
 
Would you re use your auto transmission fluid if it was only in the car for 3 years, is clean and only has about 2 or 3 thousand miles on it?
...and how about the anti freeze also?

Depends.
If I was rich I would use all new fluids, but I have reused both from swapping a radiator or a pan gasket.
I just won't use the last little bit of either fluid when it goes back in, and they have to look really good.
 
I use Dexron. Chrysler has company videos dating back to when these transmissions were sold to the public on YouTube warning against using a type F in a Torqueflite. Coolant doesn’t matter, just don’t use 100% pure antifreeze. It will make your engine run 15 degrees hotter than it should and makes vapor lock issues worst using today’s fuel in a carbureted vehicle.
Your engine will run several degrees cooler, using 100% water. Compared to 50/50.
100% distilled water in summer, swap for 50/50 in winter. Just don’t forget to drain water near the end of fall time on east coast.
 
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At that mileage/use I personally see no harm to reuse. I would bite the bullet and use it!! I take risks like that myself. I bought a "slighty" used 9.5"FTI converter on ebay. Seller claimed car was rusted beyond repair and didn't see finding another vehicle to transfer drivetrain so he parted duster out. I bought looked good to me threw under my dart sport guess what worked like a dream!!:D
 
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