I have a good supply of Dexron VI. Any reason not to use it for an automatic transmission drain and refill?
Dexron IId alternative for '86 Volvo
- Thread starter atikovi
- Start date
While I do not know definitively, were it my car I'd use the DexVI without hesitation.
Was your DexVI so cheap it doesn't pay to go fetch some house brand Dex/Merc or MaxLife for the '86?
Was your DexVI so cheap it doesn't pay to go fetch some house brand Dex/Merc or MaxLife for the '86?
Looks like for your vehicle, AMSOIL is showing their ATF, which isn't their dexron VI.
Under $3.50 a quart and planing on 2 or 3 drain and refills.
Sam_Julier
$50 Site Donor 2024
I run synthetic DEX VI in all the Volvos in my signature. The cars shift smoothly.
OK will do.
I've had better success running the correct viscosity Dex III (same as Dex II) vs. low-viscosity fluids in most older transmissions. I've found both GM and Aisin transmissions to like the "correct" viscosity better - but that doesn't mean an LV like Dex VI won't work or shorten the life.
Oh yeah, there's that. It's always viscosity.
What do transmission coolers do?
They lengthen the time weak transmissions shift well on a hot day by increasing the viscosity of the fluid, no?
What do transmission coolers do?
They lengthen the time weak transmissions shift well on a hot day by increasing the viscosity of the fluid, no?
JHZR2
Staff member
I wouldn’t run Dex VI in transmissions that old.
Not that I’m anti Dex vi at all… not am I opposed to running it in some cases. I’m running it in my 4L60E that came with Dex IIiH for example. But there was conversation early on that Dex VI may not be compatible with certain seals and elastomers. I don’t know if that was ever truly resolved. But I would t really want to find out in a materials selection in a euro transmission in an antique vehicle… certainly not when there’s plenty of generic Dex III around…
My old Mercedes transmissions get generic Dex III D/M fluid, or else Mobil 1 ATF. I don’t even run max,Ive in them because it’s an LV fluid.
Not that I’m anti Dex vi at all… not am I opposed to running it in some cases. I’m running it in my 4L60E that came with Dex IIiH for example. But there was conversation early on that Dex VI may not be compatible with certain seals and elastomers. I don’t know if that was ever truly resolved. But I would t really want to find out in a materials selection in a euro transmission in an antique vehicle… certainly not when there’s plenty of generic Dex III around…
My old Mercedes transmissions get generic Dex III D/M fluid, or else Mobil 1 ATF. I don’t even run max,Ive in them because it’s an LV fluid.
GM says Dex VI is a drop-in for Dex III. However, I don’t agree with that for non-GM ones. Allison TES-295 fluids are built off Dex III but with GIII/GV base stocks. Castrol’s “universal” ATF/CVTF is a high-viscosity fluid.
TES-295 if you feel spendy
ACDelco Dex-IIID (the last III revision) vintage 2006 is still available at a reasonable $5 a qt
ACDelco Dex-IIID (the last III revision) vintage 2006 is still available at a reasonable $5 a qt
Sam_Julier
$50 Site Donor 2024
I’m not trying to argue but but do you define success?
I have run higher cSt fluids such as Mobil 1 ATF and lower cSt fluids such as full syn DEX VI.
Doesn’t matter if its January in Stowe Vermont or September in Odessa Texas.
I can’t tell any difference.
I have run LV and Dex III/T-IV (same viscosity; T-IV is derived from Dex III) in a GM 4L30E and an Aisin U151E. Both had higher, firmer shift points with Dex III/T-IV. Some might not notice, and I can't guarantee it in every application as my n=2. It could also be the friction modifiers, of course. This is an apples-apples comparison, not worn out vs. new fluid.
Do you understand how shear stability works in an AT and what the DEXRON-II or -III licenses specify and require as opposed to DEXRON-VI?
DEXRON-VI is the correct viscosity.
I do fully understand that. Thanks for being your usual obnoxious self about thins, as always.
And you are 100% wrong. I should have put you on ignore LONG ago. No time like the present, though. Enjoy the holidays.
What on earth?
