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1939Dodge 
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Joined: 18 Jan 2014
Location: Pa.
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 Topic: B transmission Oil Questions
Posted: 26 Sep 2016 at 11:09am |
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Drained the transmission and differential today. Is there an all-season oil to go back in, or should I use 10 in winter, 30 in summer?
What about 20 all year long?
What keeps the rain water from running down the brake handle and housings from flooding the final drives?
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
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Posted: 26 Sep 2016 at 12:04pm |
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most people these days use some form of hydraulic/ transmission oil and not motor oil. Wal Mart / auto store / farm store will all sell Universal Tractor fluid or some type of Hytrans - etc... that is what you want. ......... similar to a 10 or 20 wt oil and used year round. ........ good if you have a hydraulic valve also.
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Like them all, but love the "B"s.
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tadams(OH)
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Posted: 26 Sep 2016 at 12:06pm |
There is a drain hole in the bottom of the housing that the brake handle is in and a seal on both ends.
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steve(ill)
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Posted: 26 Sep 2016 at 12:23pm |
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Dodge, you realize that the transmission and final drives are separate ? You have 3 drain plugs under the transmission, differential , pto area and you put about 8 quarts of oil back into the system thru the 1 inch pipe plug by your left foot. The brakes are outside this area as Adams said.. Then you have a final drive gear set outside of that. There is no drain on the final drive. You have to take the sheet metal pan off and scoop to get the old crud out... There is a 3/8 inch pipe plug to put less than a quart of gear lube back in.. you can use 80-90 or similar in EACH final drive.
Edited by steve(ill) - 26 Sep 2016 at 12:24pm
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Like them all, but love the "B"s.
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1939Dodge
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Posted: 26 Sep 2016 at 1:31pm |
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Thanks, fished the acorns and maple seeds out of the rake drains, wanted to flush out but thought it's better to leave well enough alone.
Will look for the third drain. Got a gallon of oil out of the differential, about half a pint out of the transmission. That's probably why the rear end was rattling in 3rd gear.
Appreciate the help!
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Dakota Dave
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Joined: 12 Sep 2009
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Posted: 26 Sep 2016 at 2:02pm |
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should be a couple more quarts in the PTO section. there is a gasket dam that prevents it from moving forward into the differential area. Half a pint is really low in the transmition section. did you poke around with a scribe and see if it has a grease dam keeping it from draining.
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CrestonM
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Posted: 26 Sep 2016 at 3:20pm |
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I'm a little confused...if there's a gasket dam keeping the oil from moving from the PTO section to the differential area, how does oil get in/out of the PTO section? Is there a separate fill and drain plug?
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B26240
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Posted: 26 Sep 2016 at 4:07pm |
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if tractor does NOT have a hydraulic pump I would use 80/90 but if you have a hydraulic pump then universal tractor fluid.
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1939Dodge
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Posted: 26 Sep 2016 at 4:26pm |
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Yes, found the third drain plug. Didn't look for a PTO fill, will look after it stops raining.
Sounds like I was seriously low on oil....
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steve(ill)
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Posted: 26 Sep 2016 at 4:33pm |
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Lets say the oil is 4 inches deep in the 3 cavities and the gasket is 2 inches tall.. ( this is just an example). Which ever plug you pull first will drain a lot of oil.. maybe 4-5 quarts. The plug you pull last will have the least. The gasket is not to separate the oil, its to keep it from sloshing around, and also stealing oil from the hydraulic pump if your nose down a hill. Some tractors had gear lube in the transmission if they did not have hydraulics.. I prefer to ALWAYS use the tractor fluid / hytrans....even if you don't have hydraulics.
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Like them all, but love the "B"s.
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Hockeygoon
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Location: Manhattan, KS
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Posted: 26 Sep 2016 at 4:57pm |
 B26240 wrote:
if tractor does NOT have a hydraulic pump I would use 80/90 but if you have a hydraulic pump then universal tractor fluid. |
Yet I have people INSIST that the transmission/rear differential on a D17 Series IV must have transhydraulic fluid - not 80W.
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