Is it good for me to use engine oil in my transmission(gear box) instead of gear oil?

will this improve performance by givin more speedIs it good for me to use engine oil in my transmission(gear box) instead of gear oil?
Generally all of the prior respondents gave you good answers. However the damage you might do really depends on how you drive. Thicker oils do typically offer better protection for reasons stated earlier. For many years Chrysler manual transmissions used Automatic trans fluid in their manual transmissions. The advantage was easier shifting when cold. If your only driving short distances around town and your car sits for long periods between drives, the thinner oil won't hurt your transmission. On the other hand if you ricky race around, shifting like a mad man and /or drive longer distances where your vehicle builds up a lot of heat then the thinner oils become a negative and your risk of damage rises. Also, where you live makes a difference. In Phoenix I'd only use the recommended 80-90 weight oil. In Anchorage the thinner oil would be fine. To sum up the, potential damage you might do depends on your driving style and ambient temperature where you live. So while it may not be good for your transmission it is also not necessarily bad either. A word of caution here, If your car is under any kind of warranty or If your not willing to foot the bill for a premature repair,, stick with what the manufacturer recommendsIs it good for me to use engine oil in my transmission(gear box) instead of gear oil?
no, but some manual transmissions do call for engine oil, albeit most manuals call for 80-90w. automatics take dextron II.





never use anything other than what the transmission is engineered to accept, the weights they recommend provide the best lubrication and cooling possible





and transmissions don't give more speed. they distribute engine power to the wheels. more wheel speed comes with higher gear ratios
do it if you dont like your current tranny
I think that the engine oil is to thin and will not lube the gears like the transmission (gear oil) would do, and this would cause your gears to wear down faster
It won't hurt it. Heavy equipment uses regular 30 weight oil in their gearboxes. Its better to use 30 weight than nothing at all. Many new vehicles with standard trans comes from the factory filled with automatic trans fluid which is about as thin as 30 weight engine oil. It will not inprove performance by giving you more speed.
no. Gear oil has a much thicker viscosity than engine oil. to get more speed,you need more air into the engine. not in the gearbox.
This is a stupid thing to do. The transmission oil for a manual transmission is specially formulated for high stress. The only cars that ever tried using engine oil in the trans (MG,Austin FWD) had transmission failure before the cars had 10,000 miles on them. Use the oil that the manufacturer recommends, period.


The amount of drag caused by higher viscosity oil is absolutely negligible.
Absolutley not, do not do that!
gear oil is thicker (90 weight) than engine oil (around 30). This means it can take higher temps and is a bit better lubing the gears in that gearbox. Engine oil if overheated will break down and you'll be in a world of hurt.





I'd stick with the gear oil.
Nope... instead it will shorten the life of your transmission.





The properties of motor oil are significantly different from gear oil.
No. Gear Oil is thinner and can withstand the hotter heats that an engine transmission puts out in every day driving situations
SURE RAT.......GOOD MOVE do it and go racing...see you at the transmission shop !! I give discounts to MICHAEL JACKSON FANS.......';ben';