vert2021

Thank you. I replaced both seals and posted a DIY in my original thread if anyone's having the same seal leaks. Link is higher up in this thread.

Replaced the leaking seals on both driver and passenger sides of the transmission. Not a bad job at all with the right basic tools. It's tight but there's enough room to get it done in place. I drained about 3 qts of ATF prior to doing this repair. I bought 2 new seals from NAPA: Automatic Transmission Seal, Manual Valve Lever Shaft - Metal Clad. Part number ATP 15234. Passenger side. Remove the bolt, nut and a locking washer from the neatral switch and pull it off Old seal is now visible, red clay color in my case Driver side. Remove the cotter pin on the left side and the 4mm hex nut above the transmission pan and take the shift lever assebly off. The old seal is now visible I've tried different methods of removing the seals, including a small screw, but the only one that worked was using this pick tool from Walmart. Basically make a hole in the middle of the seal with the pick's sharp tip, insert, angle the tip towards you and pull. Then do it on the opposite side of the seal and alternate pulling. Just make sure that the sharp tip doesn't come into contact with anything but the seal itself. Installing the new seal is easy. Clean out the area with some break clean, q-tips and shop towels first. Put some grease on the seal and the shaft. Then use a deep socket placed on top of the seal to push it in with just the fingers first and then lightly tap it in to seat against the case. This picture was taken before wiping off the grease. Same on the other side Comparing before and after pictures I noticed that the new seal was sitting something like 1mm further out than the old one. I measured both the old and the new seals and the new one is that much wider so I think that's just how it is. Perhaps this will finally fix a slow leak that I've had for a while now. It sat overnight after I filled up the ATF to the correct level and so far so good. True test will be after I put it all back together and go on a long drive. I couldn't find this information anywhere and if you're having a similar issue I hope this is helpful.

Thank you, I had this manual but somehow missed it. I found the needed seal on NAPA's site: "Automatic Transmission Seal, Manual Valve Lever Shaft - Metal Clad. Part number ATP 15234". MODS, please close this thread or delete it if you'd like. I'll post updates in this A43D specific thread:

Sounds good, though the ATF has been changed 3-4 times in the past couple of months so it's definitely fresh! Just realized that it's also slowly leaking from the passenger side of the transmission lever behind the neutral switch. It appears that I need the same part number seal so I'm going to replace both seals at the same time.

Thank you! I think I found it on NAPA's site: "Automatic Transmission Seal, Manual Valve Lever Shaft - Metal Clad. Part number ATP 15234". When you remove it, will the ATF continue to leak out until the new seal is installed?

Good to know! Any tips on how to remove/replace and what seal I would need? I can't find it on any of the schematics I've seen.

Quick update and a question. I got the transmission fixed in my driveway. It was the front seal that blew out. Replaced it and did several fluid changes, seems to be driving and shifting great. I do have a leak and was hoping someone could help me. I posted it in this thread but then figured the A43D gurus here could chime in. Does anyone know how to fix this leak from the shift lever linkage circled in red in the picture below?

1986 22re with A43D automatic transmission. There's a leak coming from the shift lever linkage where it goes into the transmission above the pan. I confirmed that the circled area below is where the leak is coming from by wrapping a shop paper towel around the lever and it gets soaked with ATF after a couple of days. I've looked through the Toyota Shop Manual as well as the A43D Transmission Service and Repair Manual and I can't find anything that would tell me if there's a gasket/o-ring or some other part that might have failed in that area or the steps needed to fix the leak. I would really appreciate any help in diagnosing and repairing this problem.

I have standard 3 ton floor jacks and can jack the truck up so they are at their highest safe setting (17") sitting under the frame rails. Is that enough or are you saying I need to increase that height further still, for example by placing a wide 1.5" board, or even higher?

Not sure, I was actually wondering if that crack had anything to do with the initial problem to begin with i.e. ATF dumping from the front of the transmission. Currently reading up on how to drop the transmission. I ordered a transmission jack adapter but reading things like "it's easier to just pull the whole engine and transmission through the engine bay than from the bottom" is not too encouraging. I work in my driveway and definitely not set up for that kind of a DIY project. If anyone can share best practices on getting it done please let me know.

I think you are right. Guess I can try ordering it and see what happens. As far as my transmission goes, my plan was to drop it using a transmission jack, figure out where the leak happened (front pump seal? something else?), replace that, put it back up, flush the fluid and hope for the best. Glad to hear that "lots of sparkly stuff in the pan" doesn't mean dead transmission right away and perhaps it can be saved without doing any major overhaul as the first post in this thread.

Sorry, trying to understand what you mean by "no matter what you do will prevent an overhaul"...

Wondering if anyone can help with my transmission problem. 1986 Toyota 21' motorhome with 60k miles. I posted it on the Toyota forums but it makes more sense here. Please check this post out https://www.yotatech.com/forums/f116/help-auto-transmission-316865/#post52484974