904 Transmission Stopped Going Into Gear

AJ/FormS said

Wow! that's a lottacoin for a couple of hours work.

I have convertors from the 70's that I'm still using, although none were involved in serious meltdowns. Transmission shops used to flush them for a small fee.

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Yup, and those old converter flushers were about as effective as now going to a lube shop to get your transmission flushed. Yes, it will get rid of the old oil, but cold solvent could never get the crud out of the vane areas. The most effective cleaner is hot ATF.