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Delay in overdrive engaging. 1800 1971

uid 5322's pic
posted by  alschnertz on  Thu Feb 2 13:12 CST 2006
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last visit: Fri Oct 24 10:32 CST 2014
[RELATED]

Hey Matt

You are correct! ATF is what the factory spec'd.
My reason for change goes back to shortly after I bought the '86 745 (around '88). A friend owned a Volvo independent shop, also had a 745T M46.

He said that for heavy duty service, VOLVO recommended 10W-30 in the gearbox.
Took him for his word although I wouldn't say the car has ever seen heavy service. I choose Mobil1 only because that is what I used in the engine, still do. Haven't had an issue yet, overdrive doesn't slip and I think I picked up 1+ mpg.

I don't know, maybe it was just an urban myth.

--
'60 544, '68 220S, '70 145S, '72 144E, '86 745T






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