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c6 transmission installation help

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Old Jul 13, 2012 | 04:35 PM
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c6 transmission installation help

i had a leaking pump seal so i dropped the c6 and replaced it. put it back with new seals and it dosent pump anything now. i believe the converter was seated right but now im secondguessing myself. i took off the 4 tc bolts from the flex plate and i can wiggle the tc with my finger does not seem like its pressed up against anything. the bolts are in maybe 3/4 of an inch inside the lip of the bellhousing. is that in all the way?

let me add that the seal leaked out of fluid while driving and the truck stopped and had to be towed the rest of the way. i turned it off when i noticed the wheels werent turning anymore. any transmission pros got some thoughts for me?
 
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Old Jul 14, 2012 | 07:07 AM
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just a dumb question it is full of fluid right?
 
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Old Jul 14, 2012 | 09:52 AM
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yes thank you for responding
 
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Old Jul 14, 2012 | 11:51 AM
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If the trans is bolted completely to the block and the bolts are tight and if the TC is bolted tight against the flex plate, then the TC is where it should be. Did you put fluid in the TC before you put it back together? Also, just a thought here..I believe the TC has a bushing that can go bad and cause it to leak I just had my C6 out for that reason. Hope this helps
 
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Old Jul 14, 2012 | 03:20 PM
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well hate to say it but sounds like u might of killed the pump when it lost fluid
also from the sounds of it u got the torque converter in right
 
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Old Jul 14, 2012 | 05:26 PM
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If the TC was not seated all the way, and you had everything else bolted up tight, your motor would be locked up, so I think your TC is seated fine. I agree it may have toasted the pump running it dry.

How are you telling it "won't pump anything now"? It just won't go into gear?
 
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Old Jul 14, 2012 | 08:02 PM
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those are some good ideas guys. couldve wrecked the pump. has anyone ever actually put a tc into a c6 correctly with their own hands? how far in does it go in relation to the bell housing? and should it be wiggly at all side to side? any clues might help.

its being yanked again now for investigation.

i let the lines go with it running and no flo out. let it run for 10 min or so. no wierd noises coming from anywhere. anyone ever do it wrong and waste their tc and pump? how does that go?
 
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Old Jul 16, 2012 | 12:27 AM
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I installed my tranni (C6 )and TC two weeks ago by myself .. not a shop. You'll get just a little side to side but it shouldnt be excessive, but it's like I said earlier..if the bell housing is bolted completely to the block and the TC is bolted completely to the flex plate then the TC has no where else to go. It has to be in place correctly at that point. The only other way that it could be installed wrong at that point is if you didnt get the 4 bolts on the TC in the holes on the flex plate and that would be self critiquing and you would know for sure where the problem is. Did you take the linkages apart at all? If so did you get them connected the right way? Thats the only other thing I can think of other than maybe the vac is disconnected from the modulator on the back of the tranni.. good luck with it.. dave
 
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Old Jul 16, 2012 | 08:20 AM
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how far in does it go in relation to the bell housing?
My auto mechanics teacher taught me this in high school, and it has worked for me on every auto trans I have ever R&R'd, and I am 51 now - try to get your fingers in between the bell housing and TC so you can reach around the back of the TC. If you cannot get your fingers in there, then it is seated properly.

if the bell housing is bolted completely to the block and the TC is bolted completely to the flex plate then the TC has no where else to go. It has to be in place correctly at that point.
This is not true - it jams into the trans pump and locks everything up. If you try to force the motor to turn at that point, it ruins the pump. I have not done this myself (owing to the trick above) but I *have* bolted a C6 to a 360 motor that came out of a manual trans truck and forgot to remove the pilot bushing - same thing happned. Got it all bolted up and the motor was locked up tight. I pulled the motor back out, removed the pilot bushing, and the C6 was not harmed.
 
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Old Jul 16, 2012 | 09:01 AM
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im taking it to a shop today to have it rebuilt. 5 or 6 hundred they said it would cost which dosent sound bad. at this point i think something was ruined when the fluid all came out that time.
 
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Old Jul 16, 2012 | 11:59 PM
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Learn something new everday.Not doubting you here Jas just a question on my part..if you left the pilot bushing in..wouldn't you have had to force the TC into the flex plate? I assume it would be alot tighter to go in. My C6 is bolted to the back of a 460 and it doesnt seem to leave alot of room for error..or at least that's what I "think" Once again, not doubting..just a question..dave
 
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Old Jul 17, 2012 | 01:13 AM
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Oh and BTW, I based my statement on not adding "extra" parts i.e a pilot bushing..don't vapor lock here..I'm just funnin ya. I do have a question though, my TC didnt require a pilot bushing..do they differ from the 360 to the 460? Pulled the new one out of the box..put fluid in it and slid it on. I assume its working and that I did it right cuz it's taking me everywhere I go .
 

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Old Jul 17, 2012 | 09:06 AM
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The pilot bushing is for a manual trans, not auto. The motor I was installing came out of a truck with manual trans. In either case, you can get the trans and motor close enough to put the bolts in and tighten it up. We are only talking about 1/4" to 1/2" difference, it's not like it's a 2" difference which would be a lot more noticeable.
 
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