What is a driveshaft oil seal?
Jan 8th 2016 at 2:12PM. The front output shaft seal is an oil seal that is installed on the front of transfer cases. As its name implies, the front output shaft seal is responsible for sealing the front output shaft of the transfer case, keeping the gear oil or transmission fluid inside of the unit.
Why is fluid leaking from the rear of the transmission?
Recently I encountered a situation where fluid was leaking from the rear of the transmission. The owner thinking it was the rear seal at the output shaft housing – replaced the seal. A few days later the leak reappeared and the owner brought the car to my shop to diagnose the situation.
What to do if you have a leak in the drive shaft?
The small hole was repaired with JB weld available from most auto parts and hardware stores. This can be accomplished by removing the yoke from the drive shaft, cleaning the area thoroughly; mixing the two-part JB weld and completely covering the plug area face up. The JB weld will flow out smoothly and harden providing an oil resistant seal.
What causes a leak at the drive shaft yoke?
As you can see, its much more obvious from this view that there is a larger area of surface oxidation on the inside of the yoke plug that could cause a much larger leak if left untreated. Photo # 3 shows the repair after the JB weld was applied and hardened.
Where does the fluid come from in the drive shaft?
A few days later the leak reappeared and the owner brought the car to my shop to diagnose the situation. Troubleshooting found the fluid leak coming from the center of the drive shaft yoke (p/n 4841), from an area I’ve never experienced a leak, until now.
Recently I encountered a situation where fluid was leaking from the rear of the transmission. The owner thinking it was the rear seal at the output shaft housing – replaced the seal. A few days later the leak reappeared and the owner brought the car to my shop to diagnose the situation.
The small hole was repaired with JB weld available from most auto parts and hardware stores. This can be accomplished by removing the yoke from the drive shaft, cleaning the area thoroughly; mixing the two-part JB weld and completely covering the plug area face up. The JB weld will flow out smoothly and harden providing an oil resistant seal.
As you can see, its much more obvious from this view that there is a larger area of surface oxidation on the inside of the yoke plug that could cause a much larger leak if left untreated. Photo # 3 shows the repair after the JB weld was applied and hardened.
A few days later the leak reappeared and the owner brought the car to my shop to diagnose the situation. Troubleshooting found the fluid leak coming from the center of the drive shaft yoke (p/n 4841), from an area I’ve never experienced a leak, until now.