High Mileage ATF D&F

[FriboRage]

I’ve got a 2000 Ford Explorer as a winter beater, it’s at 155k.

I was wanting to change the atf and filter, but I’m aware that doing that with a high mileage transmission that’s never had the fluid changed before can be opening a can of worms and create problems that weren’t there before.

I bought it at 120k, and I’m fairly sure the old owner never changed it.

Opinions? Thoughts? I’d be using merc V.

 

[Linctex]

Originally Posted By: FriboRage
...but I’m aware that doing that with a high mileage transmission that’s never had the fluid changed before can be opening a can of worms and create problems that weren’t there before.
Opinions? Thoughts? I’d be using merc V.


It's an old wive's tale.

Go ahead and change it.

 

[Linctex]

Oh, and add a few more magnets inside the pan while you are at it, if you like.

 

[Alex_V]

While there is a chance, I think it's a small one that doing a pan drop on a transmission that's working properly will cause any problems. I've done it on multiple different vehicles with no ill effects.

 

[MolaKule]

And you don't need a High Mileage ATF.

High Mileage ATF's are purely marketing.

 

[bdcardinal]

Which transmission does the Explorer have? If it is the 4R70W there is only one filter option. If it is the 5R55 there are a couple options depending on the tag number on the transmission.

 

[Mainia]

Do a pan dump and filter change, fill it, run it for 50 miles, then do a 100% flush through the radiator cooler line and call it done. The 50 miles with the 1/2 fill of new ATF will do some cleaning action and then you want to get what it cleaned out, out of there. I myself would do 2 100% ers. Cheap insurance and cheap in price if you use common ATF and not Amsoil or Redline.

 

[RyanY]

Originally Posted By: MolaKule
And you don't need a High Mileage ATF.

High Mileage ATF's are purely marketing.


What he said. However, I like what Lubegard red did for my Cadillac...shifts much smoother than Valvoline DexVI alone.