When do you replace the transmission shaft seal?

The transmission seal that is most commonly replaced to prevent leakage is the tail shaft seal.

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.

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.

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.

How do you remove a transmission seal from a car?

Place the vehicle in neutral. Unbolt and remove the driveshaft universal c-clamps at the pinion. Place a container under the tail shaft to catch lost fluid. Pull the driveshaft out of the transmission. Remove the seal with the use of the seal remover.

How do you replace Seal on th 350 transmission?

This video shows the procedure to remove and install a new seal in a TH-350, TH-400, 700R4 or 4L60 transmission. There is a removal tool available online or at NAPA for about $6. The tool part number is Evercraft 7769250.

How does a transmission seal prevent transmission leakage?

The transmission seal that is most commonly replaced to prevent leakage is the tail shaft seal. This seals the driveshaft where it attaches to the output shaft of the transmission. It is attached at this point with the use of splines. As the vehicle moves, the driveshaft moves in and out as bumps are encountered.

How do you remove seal on shift lever?

Used 7/16 socket to remove the 2 bolts that lock in the 2 levers. They use square nuts and the top one was a bit stubborn and I had to hold the nut in. The top lever was stubborn to lift off but I pried it with the screwdriver.

Can a shift shaft seal go bad on a Harley?

It doesn’t really matter the year or model of Harley, as this seal and setup has been used for a very long time. This shift lever seal can go bad and start leaking oil. To get to it, you’ll need to remove your entire primary drive. GET ALL OUR FOR PURCHASE VIDEOS HERE: https://www.lawabidingbiker.com/buyvi…

How to remove transmission shaft from Dodge Durango?

Rotate crankshaft with socket wrench on dampener bolt. (20) Mark propeller shaft and axle companion flanges for assembly alignment. Then disconnect and remove propeller shaft. (21) Disconnect wires from park/neutral position switch and transmission solenoid. (22) Disconnect throttle valve cable from transmission bracket and throttle valve lever.

How to replace shift lever seal on TF 727?

The top lever was stubborn to lift off but I pried it with the screwdriver. Kind of scary because I was afraid to damage the rod but it went ok. Later on re-assembly I use the screwdriver to pry open the lever for an easier fit.. used paper towels and brake cleaner to get the area clean. None of this is visible from below so I used photos a lot.

How do you replace an output shaft seal?

Step 1: Prepare the new output shaft seal. Get a tube of oil resistant silicon and place a fine film of silicon on the shell (outside area) of the new output shaft seal. Step 2: Get a seal installer tool that is made for an output shaft seal. Use a hammer and smack the seal installer to draw in the seal into the output shaft housing.

What causes a leak in a transmission shaft?

If the output shaft seal starts to leak, it can release transmission fluid, but it can also allow debris into the output shaft. These leaks can develop as the seal ages or because of something hitting the seal and dislodging it.

The transmission seal that is most commonly replaced to prevent leakage is the tail shaft seal.

What do you use to take seal out of transmission?

If you do not have a seal remover, you can use a common screwdriver to pry the seal out. Take care not to scratch the surface of the transmission where the seal rides, else you will have a leak that cannot be fixed without replacing the tail shaft.

Which is the most expensive seal to replace in a transmission?

The input shaft seal is the most expensive seal in your transmission to replace because it requires removing the transmission and partial disassembly. Similarly, on a manual transmission, the shift housing seal is at the top of the transmission so the transmission again has to be removed to replace that seal.

When do you replace the transmission shaft seal?