How to fix a leaking transmission in your car, DIY with Scotty Kilmer. If you're fairly certain that the drive shaft seals are an unlikely leak point, it could be grease. Transmission leak repair. Place a drain pan under the transmission where the drive shaft is connected, as transmission fluid will run out, and you don't want it dripping on the ground. I replaced the transmission in a '94 suburban drove it for 2 weeks, no problems. I took the car in to do the electrical harness recall # 18V-754 and to fix the leaky trans. The fluid is leaking out of the driveshaft yoke at the u-joint, not down from the rear housing seal. Pull the drive shaft out, remove the u joint so you can work on the yoke that goes into the trans. Leaking Transmission fluid can often be more difficult to identify than other types of leaks. Discussion Starter • #1 • Aug 6, 2005. Slide over to the back of the transmission and inspect the tail shaft seal, which is where the driveshaft spline connects to the transmission. If you vehicle is four wheel drive and you want to remove the front drive shaft, you remove it just like the rear shaft but there are bolts and straps on both ends of the front one. The plug will … Removing the transmission isn't necessary. If you have a rear, 4 wheel or all-wheel drive vehicle, the leak point is often right in the middle of your vehicle making it something you probably won’t notice unless you’re regularly crawling under your vehicle. I have had the drivetrain back in my 69 for about a month now. After the first drive it was leaking transmission fluid, the drive shaft was just a tick too long and when the suspension compressed it knocked the plug loose and caused it to start leaking. Save Share. Continue with Facebook. I noticed it when parked on a inclined drive way, now I have the truck level and see if is still leaking in a bit. When I reinstalled the wheels on the axle, I lightly coated the shaft with bearing grease to prevent corrosion. How to find transmission leaks in your car. Went on vacation came back and found a puddle of tranny fluid under it. Leaking Transmission Fluid Out Of Slip Yoke « on: March 27, 2016, 11:20:11 PM » Hello, I have a '87 v10 700R4 NP208 truck that's leaking trans fluid out of the rear driveshaft slip yoke and can not for the life of me figure out why. 1 - 15 of 15 Posts. The service department in Honolulu said: "There is no seal to be replaced, the factory says to replace the entire transmission." It's possible that its just the grease that is leaking, but I can't understand why it would turn to a liquid in cool weather. 1) Check your transmission fluid level, you probably need to add fluid to it. You will see a round plug in the yoke it looks like a frost plug. Yes, fluid will come out of the transmission if the drive shaft is taken out, that is normal. 894 Posts . If there is leaking, the tail shaft bushing will need replacing with a new seal. Re: Fluid leaking from rear driveshaft joint May 16 2013, 4:50am Continue with Google. It never had a leak … Pop out the plug by inserting a punch in the splined side of the yoke and tap on it with a hammer. (check with the truck running in park) 2) Check the gear oil in the rear axel it could be low also. A drive shaft will often have internal splines on the end that connects to the transmission and a universal joint (U-joint) on the end that connects to the differential. Join the discussion. The tail shaft of the transmission where the drive shaft exits has been leaking red trans fluid since day one. Reply. Shaft with bearing grease to prevent corrosion with a new seal driveshaft yoke the. Red trans fluid since day one Yes, fluid will come out the! 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