Using Dexron VI instead of Dexron III

[lumberjack890]

Doing the fluid change on my transmission for the first time ever. 287k miles.

The fluid it takes is Dexron III, but can I use Dexron VI since that's all that I can find at auto part stores? I've been told they're compatible

 

[Rocket Man]

Yes DexIII has been superseded by DexVI. It’s backwards compatible.

 

[lumberjack890]

Yes DexIII has been superseded by DexVI. It’s backwards compatible.

Nice gaming reference. Should i get Full Synthetic or not?

 

[Rocket Man]

I got the full synthetic both times I replaced my transmissions. If you’re not doing a complete change as in replacing the trans I would get the blend since that’s what’s in it from the factory as in DexIII.

 

[lumberjack890]

I got the full synthetic both times I replaced my transmissions. If you’re not doing a complete change as in replacing the trans I would get the blend since that’s what’s in it from the factory as in DexIII.

Ok thank you. Appreciate it

 

[treehan77]

In to see how long your transmission lasts after the fluid change...old wives tale or not

 

[lumberjack890]

In to see how long your transmission lasts after the fluid change...old wives tale or not

Ive heard it is an old wives tale. As long as you dont flush the system, it should work fine

 

[treehan77]

That’s why I’m here, to see if “should” works out for you. Mines 191k and I doubt the PO changed it.

 

[lumberjack890]

That’s why I’m here, to see if “should” works out for you. Mines 191k and I doubt the PO changed it.

Do it! Dont wait as long as i did

 

[treehan77]

I’ll wait a month and see if your still works lol

 

[lumberjack890]

I’ll wait a month and see if your still works lol

Ill keep you updated

 

[OR VietVet]

The only time I have heard of problems with a fluid change is a complete fluid change during a flush or whatever you want to call it. It was explained to me that the all new fluid is a shock to the clutches and the trans service with filter and top off fluid will still have new fluid mix with old and not give the clutches that shock. There are some here that believe that to be a "wive's tale" but when I was in the business, that long ago, I was told that by fellow techs in transmission shops. I think the big difference now is the updated fluid and better additives so the wive's tale may hold true in this instance.

 

[lumberjack890]

The only time I have heard of problems with a fluid change is a complete fluid change during a flush or whatever you want to call it. It was explained to me that the all new fluid is a shock to the clutches and the trans service with filter and top off fluid will still have new fluid mix with old and not give the clutches that shock. There are some here that believe that to be a "wive's tale" but when I was in the business, that long ago, I was told that by fellow techs in transmission shops. I think the big difference now is the updated fluid and better additives so the wive's tale may hold true in this instance.

Exactly

 

[NEECAPR]

Just a suggestion that I haven't seen here yet. No matter how much mileage you already have on the transmission, start changing SOME fluid at every engine oil change--or even more often. Easy to do with a 1/2" nylon tube down the dipstick tube hooked up to a clear juice jar receiver then out to your shopvac. You don't get much each time. My '99 SLE only gives up about a quart and a half each time--about 10%? of the running charge each time. But, it's easy, quick, strictly topside, and never gives the transmission a totally new fluid shock.

 

[OR VietVet]

How does this help? The same can be accomplished with a trans filter service every 20K-30K miles. Your process reminds me of a guy never changing his oil and filter because he has a bad oil leak and just adds oil all the time and therefore the oil change is not needed. What am I missing?

 

[Rocket Man]

Exactly. Just drop the pan and change the filter, don’t be lazy.