Originally Posted By: MolaKule
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Do you have ANY IDEA how far transmission lubricants have come in the last 20 years?
Yes I do. I formulate ATF's, MTF's, engine oils, gear lubes, and specialty lubricants so I know every component involved in ATF chemistry.
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You are right that fluid is low cost compared to a transmission. But your recommendations will result in spending more money on fluid, and the transmission's life will not be prolonged if you took the fluid out to 50,000 miles on most vehicles.
Spending more money, yes, but your last sentence is disputed.
100,000 mile FF is pure marketing hype and is a wet dream and only valid if you drive 5000 miles a years at less than 55 mph.
The whole 100,000 mile FF is an attempt to convince the owner or prospective owner that he can avoid some lifetime maintenance costs but doesn't tell him of increased wear and potential failure.
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I drained the Dex 6 out of my Silverado at 50,000 miles (with half of those miles towing a 5,500 pound trailer) and visually it STILL looked good.
Visual observation tells you anything about wear, only if it MIGHT be oxidized.
Nobody said take the fluid out to 100K. And your right-I wish I would have tested the Dex6 at the 50K interval-it would have been interesting. First transmission change for most at 50,000miles. If you formulate fluids-you should know your recommendations are OVERKILL. If not-please review with us how the New Fluids are not that much better than those of 20 years ago and how you do really need frequent change intervals, with the first one at 10K then the next 30K later.