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#1
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Anyone using this AC Delco trans fluid?
Saw this on Amazon at a reasonable price. I was always looking for sales on Valvoline for my turbo 400.
https://www.amazon.com/ACDelco-10-92...aps,123&sr=8-1 |
#2
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Found this on-line, hopefully it is helpful.
https://gmserviceinsights.com/use-th...mission-fluid/ I'll continue to use Type F fluid in my modified TH400 (to be safe) https://shop.valvolineglobal.com/pro...yABEgLb3vD_BwE JMHO
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"No replacement for displacement!" GTOAA--https://www.gtoaa.org/ |
#3
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I just had my THM400 rebuilt by a transmission engineer that works at the GM Tech Ctr in Warren, MI. He recommended that I use Valvoline Max Life Full Synthetic ATF. He said that Type F is basically B&M Trick Shift.
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The Following User Says Thank You to 1969GiPper For This Useful Post: | ||
#4
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I don't ever remember seeing this fluid. Dexron VI was supposed to be a replacement for everything that came before it.
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#5
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This is just Dextron III, right? Hope so, because that's what I put in my T56 Magnum (calls for Dextron III ATF).
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"If the best Mustang is the Camaro, the best Camaro is actually the Firebird" David Zenlea |
#6
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Quote:
The GM bulletin (revision D) says: Quote:
There may be a newer version of this bulletin. Quote:
III (H) is the latest/best version of Dexron III, but without the Dexron tradename. There was also III (F) and III (G). Are you seeing the pattern? Major changes get a numeral upgrade, and a letter upgrade. Minor changes get a letter upgrade only--from Type A to Type A Suffix A, to Dexron (B), Dexron II (C), Dexron II (D), Dexron II (E), Dexron III (F), Dexron III (G) and finally Dexron III (H). GM did very little to acknowledge the letter upgrades, most folks don't know about 'em. This number/letter system was wounded after Dexron III (H), when they dropped the Dexron trade name and started using only "III H", or in the aftermarket "Dex-Merc" or some-such. And then they more-or-less skipped to Dexron VI (J), perhaps to align with the year it was introduced (2006) while skipping the letter "I" because in some fonts it looks a lot like the number "1". The number/letter system then fell apart completely after Dexron VI (J) due to incompetence, complacency, and poor/needlessly complex engineering. Dexron HP is not backwards-compatible. Dexron ULV is not backwards-compatible. There's now so many different and non-compatible non-interchangeable yet frightfully expensive and exotic tranny fluids* you'd think the world has gone crazy. *THESE kind of "Tranny Fluids" do not include Bud Light. Drink that crap at your own peril. Last edited by Schurkey; 07-05-2023 at 09:35 PM. |
The Following 2 Users Say Thank You to Schurkey For This Useful Post: | ||
#7
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Quote:
In the 1990's B&M had a company take the old Type F fluid (Ford had a newer fluid c.1981) since it had less "slippage" and repackage it as "TrickShift" to help give their transmissions (and kits) a firmer shift. So Type F preceded "Trick Shift. Many Thanks to 1969GiPper for pointing this out.
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"No replacement for displacement!" GTOAA--https://www.gtoaa.org/ |
#8
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Quote:
I have no absolute proof, but was told the friction modifiers in type F were also better as far as slippage, so it worked 2 ways to help improve shifts. FWIW, I've used type F in every GM transmission I've owned as well as ciustomer cars that were going to be used hard, since I knew about B&M Trick Shift fluid in the 1971-72 era. |
The Following User Says Thank You to Sirrotica For This Useful Post: | ||
#9
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A guy at my local transmission shop told me that Type F was invented by Ford because unlike the rest of the industry using paper/resin clutch and band material in the automatic transmissions, Ford was using asbestos as a friction material.
The paper/resin friction material was grabby, so the fluid had friction modifiers to reduce the "grab". The asbestos friction material was slippery, the fluid was intended to firm-up the shifting to reduce the slippage. Type F has less wear protection (greater wear) on the various moving parts in a transmission, along with reduced heat capacity compared to the Dexron formulation. Eventually, Ford went away from the asbestos-based material, so they had to use a Dexron-like fluid which they termed "Mercon". Now we have Dex/Merc fluid for sale that meets some of the older specs for tranny fluid. For the record...the Dexron formulation did away with the whale oil used as an ingredient in previous fluids; Dexron used "synthetic" sperm-whale oil. NOW you know why burnt trans fluid smells like smoked fish. |
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