How to check transmission oil in a car? Just like your engine needs oil to lubricate the different components and protect them against wear and corrosion, your transmission is as well lubricated by special fluid called transmission fluid. Maintaining the proper transmission fluid level is important to keep your transmission shifting properly and your car running smoothly. How do I check my ... My forklift is a 8000 Lb. capacity Hyster probaly 20 yrs old. It has a flat head 6 cylinder engine. Forklift was running like a charm not given any trouble when I finished work, next day all engine wi … read more