Wow how old are you?

That used to be common practice for the shady used car dealers and gas station mechanics we had a 1953 Buick Roadmaster that had developed a howl in the diff on coast, the dealership mechanic put sawdustin the diff oil to try and silence it instead of replace it, the diff burned out about 6 months later.

Bananas were also used to quiet transmissions, nothing like the smell of acrid gear oil and banana to curl your hair.

Jim

 

They say you are only as old as you feel. I'll be 83 in March on my 47th birthday.

 

I think my 727 says right on the dipstick to use ATF+ but dex3/mercon is an acceptable substitute. That or it's in the book.

 

replace fluid with atf+4 adjust bands 1 have 6 of these and each have over 400,000 miles without rebuild. 1 each. 727 2 each 4 over 2 each 46rh.

 

What about making a custom blend? Like half dex 3 and half type F?

Or what If I added the wrong fluid last time I topped up?

 

The 93 D250 has dollar general DexIII in it and it shifts awesome. Never felt a 518 with 200k shift so firm into 2nd gear It leaks it so fast why should we put good fluid in it LOL.

 

if the trans does not have a clutch in the converter there should be no problem with type f or any other good name brand fluid. i even got by with f in gm trans with lockup converters for 30 years in the business

 

My trans guy says the same thing. He says the ATF+3 and +4 was/is only necessary in the lockup trannies for the lockup clutch

 

My buddy just changed his fluid out, went with the recommended fluid... Turned his torque converter into a slush box. Couldnt even feel the shifts... He has since gone with a type f /hyguard mix and is much happier.

I know that doesnt help the top up situation, but something to consider...

 

One of the problems with servicing an old transmission especially one with high miles that it could work fine or you could kill it within the first 10 minuets of driving.

My trans works fine and shifts firm but it still has its quirk, it will only slip once every morning and only once half a block from my house and then it will be fine until the next morning, been doing this since January.

It feels like the converter is draining back but even if idled in neutral for 30 seconds it still does it.

Jim