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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Sep 2001 Posts: 29,270 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,270 | I was given Dextron 3 (III ?) by Gene Berck for my 1954 Hydra-Matic.
Original fluid was Dexron or Type-A/Suffix-A
Wikipedia: Dexron-III
In 1993, GM released new Dexron-III fluid (GM Spec GM6417M and later GMN10055). It is generally backward-compatible with transmissions using earlier Dexron fluids or Type-A/Suffix-A fluid.
I filled the empty H-M with about 5 quarts (to the fill level on the dip stick)
Then, start the engine (rear-end up on jacks).
You will hear slurping sounds, and may then slowly add up to required fill (9 qts ?).
8.5 qts on refill
9 qts on rebuild
If no one offers a better answer, glue a magnet to the fill plug? | | |
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