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Thanks Bob - I appreciate your comments very much.
I have used both types of ATF in those transmissions. Mostly because the quickie-lube oil change places seem to top them up with 80W-90 ( the smell reveals the contamination ). So I drain them and refill with ATF, usually Dexron. So far I have not noticed any long term problems, and as you can tell, I have had some customers for years. The intial lock-up of the overdirve is the give-away - if it is prolonged to any extent, then the oil in use is causing slippage. The only time I have noticed prolonged lock-up is when the oil in the trans is substantially 80W-90 EP (extreme pressure for hypoid differentials).
Volvo automatics of the 60's and 70's did require type F ATF, especially the BW35 in the 120-140-160 series cars. I suspect, and this is just my opinion, that the owners manuals reflect the dealer service guides, in that the dealers were expected to stock only one kind of ATF, with preference to that needed in the auto boxes. Therefore, the type specified for the manuals was also F to avoid confusion and the stocking of other types. Some manuals even refer to a type G ATF in the early 80's, which is some European designation which I have been unable to get any info about in North America.
I'm sure that we both agree that Joe has a nice car, and that we are trying to advise him about keeping it going as long as Volvos should.
Like when I tell my customers only half jokingly, "Man's only defence against entropy is preventative maintenance!"
Rhys
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