Many smaller gearboxes have a fill hole and a drain plug. The only way to tell if the gearbox has the proper amount of oil is to unscrew the fill plug and stick your finger in it. To improve this process, replace the drain plug with a sight glass which there is many great products now available on the market.
We at BAR - M Performance can certainly obtain these for your various applications if it was in on heavy equipment, farm equipment or even industry. This makes it easy for anyone walking by to notice if there's a problem with insufficient oil. Now that you no longer need to open the fill cap regularly, replace it with an appropriate breather or quick-connects to add oil or deploy offline filtration .
The small investment on this can be priceless as the famous slogan of the MasterCard ads were a few years ago. However we don't want your business to have to have cash in that piggy bank because of something that could of been prevented. Call us today to learn more and we would be happy to discuss options with you.