As a result, the degree of force produced is comparatively greater. As such, it generates a lot of heat and friction. The manual gearbox employs a two-shaft system. While the gears in a manual gearbox are bigger than automatic ones, the automatic transmission includes more moving parts. The gears switch according to the engine’s demand in the automated version. Instead, you could call them semi-automatic. While the earlier versions of the automatic transmission did include clutches, they weren’t exactly fully automated. The only difference is that, instead of clutches, the automatic transmission uses a torque converter to change its gears. Automatic TransmissionsĮverything that happens within the manual gearbox takes place within the automatic transmission as well. And the driver has to use the shifter to set the gear and engage or disengage the pedal clutch. This type of transmission system comprises a pair of shafts paired with a set of gears. Manual gearboxes come equipped with a shifter and a clutch pedal that the driver can use to change the gears manually. This type of equipment rests entirely on the driver. Transmission fluid does not need to handle pressure, so it lacks such propertiesĮven if you’ve never driven a car before, you may have already guessed it from the name. Thanks to their high viscosity and some added additives, differential fluid can function well under high pressure While they have a certain degree of heat resistance, transmission fluid has a lesser amount Transmission fluid needs to have a certain degree of free flow to be able to lubricate the entire systemīetween the two fluids, differential oil has a comparatively higher heat resistance Componentsĭifferential fluid tends to have a high viscosity because of its need for shock cushioning But if you’re looking to grasp the full idea and have time on your hands, we suggest that you go through the whole article. We understand that your time is precious. Transmission Fluidįor those who are short on time, we’ve amassed the key points in this table. While both these do the same thing, control the speed, the way they function is pretty different. To get a comprehensive understanding of the differences between these two oils, you need to know about gearboxes and transmissions. On the other hand, their transmission counterparts are most compatible with automatic transmissions. Differential fluid has a unique design suited to work with manual gearboxes. On a more serious note, the fundamental difference between differential fluid and transmission fluid lies in their purpose of being used. transmission fluid? Well, first of all, just look at their names - they are totally different! But what’s the difference between differential fluid vs. To be honest for the amount I'll be using they truck any type of oil probably would be fineĪgain, I'm not questioning what you say at all, I'm just trying to educate myself a little better.Most people use the terms differential fluid and transmission fluid interchangeably. So I guess my question is what gear oil today would be closest to the straight-Mineral as opposed to the all purpose gear oil.(I don't even know what the difference between the 2 is ) I don't care if it is synthetic or not as long as it lubricates properly. I can try to scan the pages later if seeing it would be of help to you. I guess gear lube it is.Īnother related question that I'm still unsure of that you probably can help with: In my 1956 owners manual it lists 3 different types of gear oil GO-A (straight-Mineral Gear oil) which is what they say to use in most transmissions, auxiliarys and some rear ends, GO-B (All-Purpose gear oil) recommended in 1 transmission, and GO-C (extreme-Pressure Gear oil) recommended in 1 transmission and some rear ends. This info isn't something I just dreamed up, it's straight from the Mack technical literature, and personally, I have always used the Mack recommended types of oils & lubes for whatever truck I was working on.Ĭool. require gear lubes of varying viscosity depending on ambient temperature.Īgain, I'm posting this info to show you (and anyone else who may be unsure) what Mack specified for this application. Here are some scans from a "modern day" Mack manual concerning trans lubes, you will note that ALL mack trans. Go to a reputable oil supplier and specify that you want mineral based gear lube and you'll get the proper lube for your application.Įaton Fuller = 50W engine oil (although 85W90 gear lube is listed as acceptable for these also. If you are concerned about using synthetic gear lube, there are still mineral based gear lubes available. Your duplex is a Mack made transmission, and to my knowledge Mack has never recommended anything other than a Mack approved gear lube for use in their transmissions. 50 W engine oil is OK for Eaton Fuller transmissions, past & present.
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