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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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M47 Tranny Fluid and Diff Fluid ???Views : 563 Replies : 8Users Viewing This Thread : |
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Sep 22nd, 2018, 12:07 | #1 |
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M47 Tranny Fluid and Diff Fluid ???
Can anyone say with certainty what kind of gearbox and diff fluid do I need for my 1990 , 740 B200F with M47 in it (no overdrive unit, just standard 5 speed). I recently bought the car but there is a lot of confusion as to what needs to be used. Volvo and autodata say ATF-F (automatic gearbox fluid), a lot of people have had problems with gearboxes after doing so though. Comma guy says 75w-80... Some recommend 75-80W GL4 for the box and 75W-90 GL5 for the diff. Please, can anyone help ?
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Sep 22nd, 2018, 13:16 | #2 |
bob12
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You may find this link to a similar thread I started in mid-August useful:
https://www.volvoforums.org.uk/showt...=285278&page=2 The jury seems to be out on what Volvo may have originally put in the gearbox and short of sending a sample off for analysis you are unlikely to get a definitive response. Someone in the past may have even put whatever in it! The sensible answer if you need to change the oil seems to be to drain the box well when hot and put in either of the two oils Volvo recommend. Bob |
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Sep 22nd, 2018, 13:20 | #3 |
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Sep 22nd, 2018, 14:16 | #4 |
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Does your diff have a LSD fitted?
Should be an ID tag on it somewhere, either held captive by one of the bolts through the diff or stamped on (can't remember) and should give you a diff type. If it's 1041 or 1043 then it's LSD and needs an additive. If not, 75W80 or 75W90 will be fine and you can also use a product to quieten noisy diffs/gearboxes if it whines a bit. Out of the two ATFs Volvo recommend for the box, i'd go for the Type G as it has enhanced friction modifiers over the "F" type. As already mentioned thoguh, probably best to drain the gearbox completely and then refill with your chosen fluid.
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Sep 22nd, 2018, 21:39 | #5 | |
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Quote:
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Sep 22nd, 2018, 22:59 | #6 | |
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If memory serves correctly, the Dana "Trac-Lok" is a copy/development of the old Salisbury "Powr-Lok" diff and the Eaton G80 came along later so that would tie in with what i'm thinking about the 1041 axle being the Dana Trac-Lok and the 1031 being the basic open Dana diff.
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Sep 26th, 2018, 19:46 | #7 |
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Is the rear diff the same as the 240?
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Sep 22nd, 2018, 20:36 | #8 |
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One thing I realised, GL5 can only be used in the diff ! If used in the box, will ruin it. So diff will be 75W-90- GL5, preferably synthetic, box- 75w-90- GL4- synthetic if possible. Thanks to everyone.
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