I've done mine 2 times over the past few months. Once for the fluid/filter change and once for the K1 kit/fluid change.

Both times I drained the converter too. The drain plugs are an H5. The trans. took right between 6 to 6.5 qts. both times. Follow the advice above. Start at around 5 and add from there and you will be fine.

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AJ

1985 300D (SOLD)