My oldest daughters boyfriend has a 2003 Impala 3800 with the 465 trans in it (130k). It says on the trans dipstick DexIII but was wondering if I can use DexVI or if I should just use a Dex-Merc ATF in it?
What year did GM go to DexVI in the 465TE ?
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Dex VI can be used in any year 4T65E. It is preferred over Dex III as it is at a minimum part synthetic.
Maxlife works very well and is a full synthetic.
Maxlife works very well and is a full synthetic.
05+ I believe.
I don't like VI in our '04 box, because it slips terribly if its 'torqued' during a shift. It also shifts sluggishly and slowly (GM Normal?), but even still at times it's not even smooth doing it.
I don't like VI in our '04 box, because it slips terribly if its 'torqued' during a shift. It also shifts sluggishly and slowly (GM Normal?), but even still at times it's not even smooth doing it.
I've been using Dex VI in my 2000 Bonneville for almost two years with no issues.
MaxLife Dex/Merc
Dexron VI is perfectly backwards compatible to all GM automatic transmissions. Use it with confidence.
As someone else mentioned, Maxlife ATF is great stuff.
However, Mag 1 Synthetic Low-Vis is also a good option.
There is also Mag 1 Dexron VI
If you still prefer not to go the Dexron VI route, and want the high viscosity of Dexron III, then Mag 1 Synthetic ATF is a great value.
As someone else mentioned, Maxlife ATF is great stuff.
However, Mag 1 Synthetic Low-Vis is also a good option.
There is also Mag 1 Dexron VI
If you still prefer not to go the Dexron VI route, and want the high viscosity of Dexron III, then Mag 1 Synthetic ATF is a great value.
The ONLY application you cannot use DEX6 in an older Dex3 use is in transfer cases. For example, the AWD transfer case in my 2006 Sierra Denali came with DEX3. The replacement to use,per GM, is a gear oil that they sell. I have always used Mobil 1 syn transmission fluid and will continue to use it. I do use the DEX6 in the transmission as it was the factory fill and required spec for it.
GM transfer case fluid is believed to be similar to DEX III formulation, not gear oil.
Originally Posted By: bmod305
GM started using DEX VI in 2006.
Dave
Originally Posted By: jrustles
05+ I believe.
I don't like VI in our '04 box, because it slips terribly if its 'torqued' during a shift. It also shifts sluggishly and slowly (GM Normal?), but even still at times it's not even smooth doing it.
YES! As GM released new or updated models, it was around this timefram that DEXRON VI was introduced, IIRC!
GM started using DEX VI in 2006.
Dave
Originally Posted By: jrustles
05+ I believe.
I don't like VI in our '04 box, because it slips terribly if its 'torqued' during a shift. It also shifts sluggishly and slowly (GM Normal?), but even still at times it's not even smooth doing it.
YES! As GM released new or updated models, it was around this timefram that DEXRON VI was introduced, IIRC!
Originally Posted By: ledslinger
GM transfer case fluid is believed to be similar to DEX III formulation, not gear oil.
I don't know for sure if its just Dex3 or not as I just use Mobil 1 ATF which meets the Dex3 requirement for my transfer case and after 86k miles it still runs perfectly. I change the fluid every 30k miles.
Quote from the Dex6 GM bulletin #04-07-30-037E:
"Any vehicle that previously required DEXRON®-III for a manual transmission or transfer case should now use P/N 88861800. This fluid is labeled Manual Transmission and Transfer Case Fluid."
GM transfer case fluid is believed to be similar to DEX III formulation, not gear oil.
I don't know for sure if its just Dex3 or not as I just use Mobil 1 ATF which meets the Dex3 requirement for my transfer case and after 86k miles it still runs perfectly. I change the fluid every 30k miles.
Quote from the Dex6 GM bulletin #04-07-30-037E:
"Any vehicle that previously required DEXRON®-III for a manual transmission or transfer case should now use P/N 88861800. This fluid is labeled Manual Transmission and Transfer Case Fluid."
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