Having some issues with my Th-350 Trans. Went the Meltdown a few weeks back. Made a pass and right at the finish trans fluid started coming out everywhere. Stopped the car at the end of the track to find what looked like a hole in the pan as much fluid was coming out. After further inspection found that the o-ring seal around the pump was leaking. Took it apart and found there was a flaw or tear in the outer o-ring. I had a brand new TCI pump in the box that was in the shop and decided to install that one because everything was new on and in it. I installed it and then reinstalled the trans in the car. Filled the fluid back up and now I have a slipping or no reverse. Anyone ever have this problem or is there a trans guy out there that might know. This is becoming very frustrating. Thanks in advance.
Hard to say ,because you have two issues there. You substituted an unknown part, after possibly smoking the direct clutch. That would give you no or slipping reverse. Is it a manual valve body? Do you have third gear?
Must have some sealing rings going into the direct drum or wouldn't have third. I assume this is a race only trans. Full fed direct? Middle seal out of it ? You've got to have same amount of rings on the pump as what came out . Two outers, or all three.
There are supposed to be 5 metal or teflon sealing rings around the smaller diameter, long part that sticks out the back of the pump. this is what they look like, the teflon version, they are colorful. The metal type are cast iron, sort of like piston rings.
I know. But others were asking you if the sealing rings were on the pump, so that it would provide pressure to the drums, and actuate the clutches. It's kind of hard to tell how much you know about automatic transmissions.
Yes sealing rings are on the pump. Too answer the other question, I know enough to be dangerous and at this point I might just hand it off to someone more qualified.
Sounds like a good idea to let a tranny guy look at it before you do more damage. Did you air check it before you put it back in the car? I would assume not ?
Excuse me ...There are 5 on a T350. The last two are for forward clutch, which we are told, works. The other three are for direct (3rd) . I am concerned about them because you need the direct for reverse. I suspect a non- stock mis-match , or malfunction in that area. Can see how the v.b. gasket is wrong, when he said he didn't change anything else. Not being there, all we have is words on a page.
I thought the question was if we put air to the pump to watch and see if the diaphragm worked. It worked fine.
Okay. I don't know what to suggest at this point, besides pull the pump, and inspect the sealing ring area near the 3 matching ring area. If you don't see anything wrong, then put the old pump in with the new O-ring on it, and hope for the best.
Mark, I did over fill the trans when I had put it back together. The fancy chrome dipstick that was originally put in it was not reading accurate. I got a standard metal one and found it was over filled. I drained it off so it was at the full level. Do you think that it captivated it with air and that is part of the problem? I didn't run it too long. I haven't tried it again since the problems started.
No, I doubt it. I'd try it on jackstands first . See if you got any kind of reverse at all . If so , then put the weight back on the tires and try it like that.
It is on jack stands now. When put in reverse it delays a couple seconds then starts rolling. I can take a couple fingers and grab the piecrust on the sidewall and make it come to a stop.
don't know what caused this but you're going to have to tear it down. Should be obvious enough and I still think it's related to the direct clutch. If you find something wrong there and there's not too much junk in the trans you might be able to do a little patch up rather than a full tear down. several guys here that can help you with it as long as we get some pictures
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