Which Tranny Fluid To Use??

[Boston Mangler]

Hey Guys

Going to drain and fill my tranny fluid tomorrow.

Wondering what is recommended between Synthetic and NON.

The fluid in there looks nice and clean, so i am not going to flush it.

Seeing as the difference between a drain and fill and a complete flush and fill is quite a bit, seems switching to Sythetic with just a drain and fill isnt such a good idea

Opinions?

Thanks

 

[turbocruiser]

FWIW, I use Mobil 1 Synthetic ATF, and I do a drain and fill about every third oil change. I used to do that every oil change for the first 10K or so that I had my rig. I have had no problems with leakage and it smooths the shift, in my opinion. HTH.

 

[Boston Mangler]

FWIW, I use Mobil 1 Synthetic ATF, and I do a drain and fill about every third oil change. I used to do that every oil change for the first 10K or so that I had my rig. I have had no problems with leakage and it smooths the shift, in my opinion. HTH.

Thanks for the input. Currently there is some unknown stuff in there and i want to replace it, the PO seemed like a cheap SOB so i doubt it is synthetic!

What is required to swap over? Complete flush and fill? Filter change?

 

[cruiserdan]

Your poll is a bit outdated as Dex-II has not been around for years. It's Dex-III/Mercon now.

 

[Boston Mangler]

Ahhh, saw that, so DEXIII is fine? Very cool!

Sooooo, which DEXIII??

Thanks

 

[cruiserdan]

I use Valvoline

 

[Boston Mangler]

I use Valvoline

Syn or Regular?

Thanks

 

[cruiserdan]

plain old dino type.

 

[Boston Mangler]

Thank You Sir!

 

[Jason Andrews]

I use Valvoline

I use Valvoline too. I have had good results with the Maxlife oil slowing my oil leak, so I use the Maxlife ATF also.

 

[alaskacruiser]

+1 on the Mobil 1- Mobil 1 Synthetic ATF works great

 

[RWD]

Another Valvoline dino user here. I too do a drain and fill every 2-3 oil changes. Did it every oil change when I first got the truck until the oil looked ok.

 

[Cruiserdrew]

plain old dino type.

Dan's truck is ready to fall apart, don't listen to him. Mobil 1 Synthetic is the good stuff. There is a new version that just came out which I am demoing right now, and like all ATF, it seems fine. If you're a CB (cheap bastard), buy the Chevron ATF DexIII by the case at Costco. Then you can do 3 quick swaps and replace at least half of the fluid.

I try to drain and fill 4 quarts of ATF with each oil change. I don't know if it helps or not, but the tranny at 100k shifts well and the fluid looks pristine.

 

[cptmud]

redline hightemp ATF syn

 

[Boston Mangler]

I try to drain and fill 4 quarts of ATF with each oil change.

4? The FSM Says 6

 

[whodat]

Mine takes 4 qts per change

 

[Cruiserdrew]

4? The FSM Says 6

The older clunky tranny;p may take more per fill. The later sophisticated tranny takes exactly 4 per drain and fill. The factory manual says 2, but it is wrong. If you drop the pan, then you get a couple more quarts.

 

[4x4CPOSEADOG]

I voted for synthetic dexron II. I used Mobil synthetic ATF dexron III on mine.

 

[Boston Mangler]

The older clunky tranny;p may take more per fill. The later sophisticated tranny takes exactly 4 per drain and fill. The factory manual says 2, but it is wrong. If you drop the pan, then you get a couple more quarts.

I have a A442F

 

[Fly Rod]

It is my understanding that unles you do a fluid "exchange" you will not get a full oil "change." So if you are switching over to a synthetic then explore this aspect. I am running synthetic and imeadiately found the shifting to be improved. IMHO, quieter and more solid.

Fly Rod