Ideas for horse power improvement in 1993 se - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 06-23-2007, 01:17 PM   #21
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Old 06-23-2007, 01:31 PM   #22
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Quote:
Originally Posted by 91buickman
i heard of also upgrading to dexron 5 its supposed to be light years ahead of dexron 3
Your link is for Dex 6.

Quote:
GM introduced the Dexron-III(H) spec just two years ago, but decided it needed to upgrade again to accommodate the Hydra-Matic 6L80, its first six-speed automatic transmission. As far as the transmission fluid is concerned, the biggest change with the 6L80 is that it puts clutch interfaces in direct contact with each other, rather than using a buffer such as a freewheeler between them. Having direct contact improves the speed and efficiency of power handoffs between clutches, but it also requires greater precision to keep those interactions consistent.
To me, that means the fluid has to be thinner. And that is NOT good for the 4t-60e, especially for a non-rebuilt unit. It would mean absolute death putting that fluid in that unit. They say Dex6 will supercede all other fluids, but for some reason, I don't buy that.
But in a rebuilt/remanufactured model that has been upgraded with the latest updates, I might buy in.

Anyways, let'* steer this topic back to where it needs to be. This is not a dispute on what fluid is better than the other. Save that for a new topic, shall we?
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Old 06-23-2007, 01:38 PM   #23
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Quote:
Originally Posted by sandrock
Quote:
Originally Posted by 91buickman
i heard of also upgrading to dexron 5 its supposed to be light years ahead of dexron 3
Your link is for Dex 6.

Quote:
GM introduced the Dexron-III(H) spec just two years ago, but decided it needed to upgrade again to accommodate the Hydra-Matic 6L80, its first six-speed automatic transmission. As far as the transmission fluid is concerned, the biggest change with the 6L80 is that it puts clutch interfaces in direct contact with each other, rather than using a buffer such as a freewheeler between them. Having direct contact improves the speed and efficiency of power handoffs between clutches, but it also requires greater precision to keep those interactions consistent.
To me, that means the fluid has to be thinner. And that is NOT good for the 4t-60e, especially for a non-rebuilt unit. It would mean absolute death putting that fluid in that unit.

Might as well put in cooking oil.

But in a rebuilt/remanufactured model that has been upgraded with the latest updates, I might buy in.

Anyways, let'* steer this topic back to where it needs to be. This is not a dispute on what fluid is better than the other. Save that for a new topic, shall we?
sorry i ment dex 6
but obviously you didnt read everything if you keep going you will find this


GM, Afton and Petro-Canada sought to develop a fluid with a more consistent viscosity profile compared to Dexron-III(H); that would perform more consistently in extreme conditions; and that would degrade less over time. They achieved these improvements, officials said, by raising requirements for oxidative and shear stability, foam performance and protection against pitting.

GM claims that Dexron-VI delivers more than twice the durability and stability in friction tests than do existing fluids. Although the company is still gathering data, it expects this to lead to a drain interval extension of roughly the same order.

“The result [of the effort] is a new fluid that significantly outperforms existing fluids in every aspect,” said Roy Fewkes, driveline fluids group leader for GM Powertrain. “In fact, we have had to significantly extend the length of our durability tests to fully test the fluid’* capability.”
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Old 06-23-2007, 01:41 PM   #24
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Editied my previous post just when you posted. I admit, I skimmed. I would like to see what effect this fluid has on older, non-rebuilt transmissions before I go buying it.

It'* funny. GM said the same thing about Dexcool and how it is far superior to the older green coolant
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Old 06-23-2007, 05:33 PM   #25
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BTW, That is Dexron 4

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Old 06-23-2007, 08:41 PM   #26
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If it aint broken, dont fix it. The transmission is made for Dex 3/4, so you'd stick with it. Its not made for anything else. There would be no benefits to get anything other than regular transmission fluid, and there are no possible ways you can improve your transmission by putting in any other kind of fluid except to screw it up (Lucas Transmission Fix is an exception).

Ive used regular transmission fluid in my 1993 SE through all its life, and my original factory transmission is still running like its new 207k miles later. No slip, no nothing. If you want a durable transmission, install an auxiliary transmission cooler and keep changing the fluid every once in a while. Thats it.
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