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Old 06-29-2012, 04:51 PM   #101
1977K10
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Re: My TH350 rebuild

ok, got some more pics of the intermediate clutch drum. After I double checked the direction of the seals, and replace them facing the correct direction, i seated the spring base with a rubber mallet, with light taps, the base set nicely and allowed me to take the C-clamps and compress the springs and get the lock ring in place.
here are the pics of the process. the intermediate clutch drum is replaced, and complete ready to install.
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1977 K10 Chevy short box
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Old 06-29-2012, 04:56 PM   #102
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Re: My TH350 rebuild

ok here is the video of me assembling my intermediate clutch drum
steel plate - friction ring - steel plate and so forth.
http://youtu.be/pJFAXLx3QxQ
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Old 06-29-2012, 04:58 PM   #103
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Re: My TH350 rebuild

I you drove the piston in with a hammer i promise you cut the seals. they have to be installed the way i told you. You can't force the lip seals in, they have to installed very carefully.
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Old 06-29-2012, 05:07 PM   #104
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Re: My TH350 rebuild

I didnt slam down, the rubber mallet was like maybe an inch above the spring base, would that even damage that ring? if so, I'll go back out tomorrow and open that back up and check them before I go on.
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Old 06-29-2012, 05:13 PM   #105
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Re: My TH350 rebuild

I did use clean trans fluid, and the feeler gauge, I just didn't have the Vaseline, I'll recheck it and make sure the seal didn't get cut.
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Old 06-29-2012, 05:16 PM   #106
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Re: My TH350 rebuild

If you can get to some air you can check it by putting air to the hole in the inner bore of the drum and see if the piston moves the clutches all the way out.

The inside lip of the drum where the seals start down in the drum will cut the seals going in if you force it at all. Using a feeler gauge you go around the outside of the piston then the inside bore of the piston to get the seals to start down past the lip on the bore.

The only piston you can force in is the low/reverse in the bottom of the case because they use square cut seals not lip seals.
If you need to see how it's done i will try and take a video this weekend and upload it.
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Old 06-29-2012, 05:19 PM   #107
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Re: My TH350 rebuild

gotcha, that would be great, to see a video on how to do that the manual doesnt show that, i see what your saying.
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Old 06-29-2012, 05:51 PM   #108
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Re: My TH350 rebuild

If you don't have a full blown air compressor can the check be done with a 12v compressor with the beach ball fitting?
Just trying to think of a cheap way for him to check with compressed air.
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Old 06-29-2012, 05:56 PM   #109
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Re: My TH350 rebuild

Not sure if you could get enough pressure or not.
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Old 06-29-2012, 05:58 PM   #110
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Re: My TH350 rebuild

Quote:
Originally Posted by 1977K10 View Post
I did use clean trans fluid, and the feeler gauge, I just didn't have the Vaseline, I'll recheck it and make sure the seal didn't get cut.
When you use the feeler gauge and the lip seals go past the lip on the drum it will fall right to the bottom with a clunk. It shouldnt take any force. It also helps to rotate the piston a little to get it to go in.
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Old 06-29-2012, 06:16 PM   #111
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Re: My TH350 rebuild

Ok, that gives me alot better idea as to what i am watching and listening for, as that drops
I'll double check the seals befoee i go to work tomorrow. i was thinking there was going to be a bit of air behind the piston that i was going to have to overcome in order to seat properly
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Old 07-05-2012, 05:17 PM   #112
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Re: My TH350 rebuild

well i got very lucky, I didn't tear any seals, I got the forward, intermediate and my pump together and got my pressure test done, sounded good, looked good.
I got the valve body and the guides together today, I have cleaned the pieces and looked at the lube link I was sent a few posts back, I am going to get the trans fluid for flushing out the trans, then get all new fluid for the engine and trans, and get that taken care of, so I know it's clean.
pics will come in later today
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Old 07-07-2012, 11:21 AM   #113
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Re: My TH350 rebuild

Quote:
Originally Posted by 1977K10 View Post
well i got very lucky, I didn't tear any seals, I got the forward, intermediate and my pump together and got my pressure test done, sounded good, looked good.
Sweet, was a little worried you might have ripped some seals.
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Old 07-07-2012, 02:34 PM   #114
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Re: My TH350 rebuild

Glad it was OK. Goodluck on the rest of the build.
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Old 07-08-2012, 09:17 AM   #115
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Re: My TH350 rebuild

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Old 07-08-2012, 04:44 PM   #116
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Re: My TH350 rebuild

I was worried to.
after it was air tested, i got 2 qts new trans fluid and filled the intermediate pack just to soak the rings and make sure there was no dry rings, and after the flooding rains came, i am just holding on for a bit.
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Old 07-15-2012, 10:37 AM   #117
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Re: My TH350 rebuild

looking good, and sounds like you got alot of help, I was out doing the usual life stuff and such, like getting married,
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Old 07-15-2012, 12:41 PM   #118
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Re: My TH350 rebuild

I had modified a bicycle pump to give me a seal test, i wanted a second test because i didnt get to see the first. i wanted to make sure there was no hissing.
i am almost ready to get the trans back together, i am just getting the rings and pump back in.
i had to get creative until i got my friday pay, when i got my 100 psi pancake air compressor.

pictures:
1. the modified bike pump
2. the air gauge
3. the air accessory coupler
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Old 07-15-2012, 12:43 PM   #119
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Re: My TH350 rebuild

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looking good, and sounds like you got alot of help, I was out doing the usual life stuff and such, like getting married,
congrats on getting married.
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Old 07-25-2012, 10:38 PM   #120
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Re: My TH350 rebuild

Ok, been stuck for a bit as to my initial reassembly, everything was good until about a 1/4".
i went through my parts taken out vs the parta going in found i put a part in, that i didnt take out.
Tomorrow, i take that extra out and get everything back together.
And back on the road by next week. I will post more pics as i go.
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Old 07-31-2012, 02:04 PM   #121
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Re: My TH350 rebuild

Im redoing a th350 right now aswell and im at the same point. Only issue I discovered was a bit of air coming out where the snap ring was placed when applying 30 psi.

The direct piston also would not stay up once the trigger was released, but the seal was still made on the pump with the nozzle.

Also, did you have to hold your finger on the other direct drum port on the pump? If i dont, at 30 psi the piston wont rise, but if i do the piston will rise.

Any ideas?


(im also dual feeding this trans)
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Old 08-07-2012, 09:53 AM   #122
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Re: My TH350 rebuild

sorry for my delayed response been helping some friends out with their cars and working.
When I retested the seals and such I just charged my foot pump (as seen in the above pics) to 25-30 psi, I put the pump, the intermediate, and the forward clutch packs together, and introduced the air into the "system" I didnt have to put my finger over anything. I just had to make sure everything fit well together, and that the seals were all in good shape.
I hope this helped, if you do have any more questions I'll be glad to help.

My transmission will be getting in this week, I charged my battery yesterday and fired up the ole girl, and she sounded good.
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Old 08-07-2012, 10:30 AM   #123
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Re: My TH350 rebuild

yea my intermediate checked fine but this was for the next part the direct drum, I think while dual feeding the flow is allowed out the inlet and outlet direct drum holes to add more flow and that is why I had to hold my finger over the outlet aswell. I started on the forward clutch and caught one of the teflon slash cut seals and it wouldnt make a good seal to air check so Im trying to reshape the seal and make it work.

Soak it in Trans fluid and hold it tight around the piston with a wire tie
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Old 08-16-2012, 04:14 PM   #124
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Re: My TH350 rebuild

ok, the transmission is back in and everything is hooked up, and bolted together, I now figure I have got my flow backwards because when I start her I can get through the gears , but I dont have the ability to go yet, and I am able to see a leak , but everything is tight and together.
any ideas so far?
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Old 08-16-2012, 04:18 PM   #125
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Re: My TH350 rebuild

What do you mean you have your flow backwards?
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