My 740 wagon is gone now and when I sold it, the old replacement ZF rack was starting to lose fluid again, which isn't surprising since the steel lines were really rusty and I just painted them with POR 15 when I put it in several years ago. As far as I can remember I used Dexron because that's what we use in all our other cars and there's always a jug in the garage. But the rack wasn't leaking from the boots, so I can't confirm that Dexron destroys the seals in these racks. Nevertheless, this is the first dissertation I've seen on why Type 'F', as specified, should be used instead of Type 'A'.
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1992 745, >500k km (now gone, but not forgotten)
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