The transmission in my van is slipping.
When a transmission is slipping the fluid is the first thing to check. When looking at the fluid, not only should the proper fluid level be accessed but the condition of the fluid as well. A low fluid level would cause transmission malfunctions like slipping. Poor fluid condition, however, can be a sign of other internal issues. A harsh burnt smell, dark color, or particles in the fluid can be a sign of wear and possible internal damage. Dirty fluid can also indicate a possible a partially plugged filer meaning that not enough fluid could be flowing through the valve body causing clutches or brakes in the transmission to not be fully engaged which can cause slipping. You may want to enlist the help of a mechanic, such as one from YourMechanic, who will have the training and equipment to accurately inspect your transmission and recommend the proper repair.