I know, I know ..... Its making me crazy ..... but there are two views on this. Other reputable tranny guys say no syntheic.

I could have and almost did buy the Royal Purple...they had it in the shop I got the B&M tranny pan from.

Does your car get track time (abuse)

And usd2sing makes a good point that I didn't even think about.....what about the TC.

The install is happening tomarrow and I have no time to get anything but the Dexron VI that I am delivering to A&A in the morning on my way to work


DH

 

I'm sure he was talking to me ....... so what fluid are you using and do you track your car???


DH

 

Hot off the presses... I was just informed tonight that AMSOIL ATF will soon be reformulated to meet both GM Dexron VI and Ford Mercon SP (the spec for my F350 tranny). So by the time you need your next change, the AMSOIL ATF should meet the Dexron VI spec.

 

I want to change my A4 Oil from Dexron III (GM #12378470) to Dexron VI (GM# 88861003).

Since I don´t have a new Tranny, and I don´t want to take it to the dealer, is it okay if dexron III and dexron VI get mixed up?

I only get about half the oil out with an normal oil change.

 

that's cheating but I like the ingenuity.

 

I would like to know what Rodney is recommending also
He built mine
solid for some time
Flawless
John Sr.

 

DH, I have followed your thread with great interest, you already know why. I think Rodney gave you some great advice because the synthetics tolerate a great deal more heat than other oils. That's their biggest advantage over non-synthetics.

It is always tempting to follow the recommendations of GM. But don't you think that you have far exceeded the limits of their recommendations?

I am not sure why Gear Star has not caught on as a transmission builder on the forum. Since they haven't maybe many here do not consider their opinions valuable. But, having said that my Gear Star built unit came back to me full of Amsoil Synthetic Super Shift which they use exclusively. I have an SS3600 converter and at my first HPDE I was not paying attention to my A4 temps. When I did finally look my temp was over 282 yet my A4 still works perfectly. I have to credit this to the Amsoil fluid and Gear Stars work.

After that session I went home and put a bigger cooler on the car. When I did I also looked at the fluid. It looked good and no burned smell or discoloration. I for sure dodged a bullet at those temps.

So... here's another opinion for what it's worth;
You should dump that Dextron VI and get a synthetic. The ability to tolerate excessive heat is far more important than the subtle formulations used in different fluids. You're not looking for an oil that will last 100K miles. You'll be changing it often anyway. What you need is something that that can handle the heat demands of road racing and that is going to be a synthetic.

 

Sounds good ....... let me know when its available.

I assume it will be full synthetic as well.


DH

 

All good points as we have discussed before

There did seem to me that there was some validity to the argument that the non synthetics had some additives that prevented the clutch packs from slipping. If this occurs it doesn't matter if the oil is good or not.

I had to make a quick decision as my tranny is being installed as we speak. So I didn't have as much time to resaearch as I would like. If Amsoil was available over the counter I could have still used it today.

I am hoping my new pan and large cooler are going to keep my temps down anyways.

But I now have heard from enough synthetic users that I will be switching to the NEW Amsoil which will be Dexron VI compatible....so I should have the best of all worlds then.


DH

 

I have used the original Mobil 1 synthetic ATF in my A4 with no problems at all.

I am now using the newer spec. "H" Mobil 1 syn. ATF in the gear box of my '02 Z06 and noticed much smoother shifting.

I might add that I have always used Mobil 1 synthetic ATF in the overdrive unit of my 4+3's and never had any problem with those od's.

How much improved is this new Mobil 1 ATF ?

 

DH,
Yep it will be a Group IV PAO based synthetic, just like the current version. I'll be gone most of the summer but this should be out well before your desired change in six months.

 

I am probably doing 4 more track days this year. So I will be wanting it as soon as its available. Just put me down for a case right now!!!!

Also I assume if a complete flush can't be done that they it will be compatable with the Dex VI


DH

 

DH,
It will be compatible with Dexron III and VI. I'll do my best to let you know as soon as I can.