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Torque Converter Installations

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Old 05-08-2011, 04:54 AM
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Sounds like your fresh tranny may be the culprit.
Old 05-08-2011, 09:04 AM
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ok so i pretty much every post in here and seen only one relating to my concern. when i measure the spacing between my converter pads and flexplate i have atleast a 1/4 inch gap. my question is should i stack washers to get me to the 1/8 inch gap that i need and then use longer bolts to bolt up with? or is my gap way to large and should i be worried that the transmission is not built correctly?
Old 05-08-2011, 12:43 PM
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Makes me feel better It just didnt seem like the converter was all the way seated but its bolted up to the motor and I have a nice gap and it spins freely so hopefully its good to go.
Originally Posted by Vince B
Indefinite.... It's important to check so the obvious does not happen and cause damage to your transmissions pump and also the converter. The problem is it might not happen right away or at all but it potentially can happen. More than likely you will not see an issue right away unless you brake the pump or converter hub. Because the spacing is off does not mean your trans will not function correctly. The reason for this thread is so the pump rotor/gear are making the proper amount of contact to be supported safely. I hope this clarifies your question here.



I think you are fine. Knowing that your converter pads to the face of the bell were an inch or more your good. Personally I think the "3 clicks" is not the correct way to know the converter is in. I personally cringe every time I hear that term used. I have probably installed thousands of converters in doing this for 20+ years. Not always will you hear this because it easy to actually have two of the three splines make contact at the same time as you are applying pressure to push the converter into the pump. I hope this makes sense. With 3/16's I would bolt it up. Your good to go providing you have measured the spacing as mentioned previously in this thread. HTH Vince
Old 05-08-2011, 02:09 PM
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Originally Posted by 402GOAT
ok so i pretty much every post in here and seen only one relating to my concern. when i measure the spacing between my converter pads and flexplate i have atleast a 1/4 inch gap. my question is should i stack washers to get me to the 1/8 inch gap that i need and then use longer bolts to bolt up with? or is my gap way to large and should i be worried that the transmission is not built correctly?
You really need machined washers. And you need a 0.125" or 1/8" washer inbetween each converter to flexplate mount. Chris at circle d supplied me with the correct machined washers that I needed to make my gap right
Old 05-09-2011, 12:06 AM
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Originally Posted by z99ls1
And you need a 0.125" or 1/8" washer inbetween each converter to flexplate mount.
I think to explain further, that's an 1/8" worth of shim between the flexplate and converter bolted together. At least that's my understanding anyway.
Old 05-09-2011, 11:50 AM
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I have a 5/16 gap between the converter pad and flexplate how thick of washer should I use?
Old 05-09-2011, 07:57 PM
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Wow 5/16(.3125) is a lot! I personally would check with the manufacture of the converter to see what the built height of the converter should be. Also check what the measurement from the face of the bell to the converter pads is. If all this is in spec's I would think that you have play in your crank or a flexplate that is not correct or bent. You might want to check these things first. Keep in mind that the converter pilot has to be supported in the crank and if you use to much shim it might not be supported properly depending on the length of the pilot.

Being that 3/16(.1875) is the max we want to see. I would say that you need at least 1/8(.125) of an inch of shim. 5/16-3/16=1/8 make sense?
Old 05-09-2011, 08:06 PM
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I put a 3/16 washer in it. Leaves me with a little under 3/16 gap
Old 05-09-2011, 09:07 PM
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Sounds good to me. I personally like to see 1/8"(.125) and I think that is about where you are at from what you have posted.
Old 05-10-2011, 02:09 AM
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Originally Posted by Vince B
Keep in mind that the converter pilot has to be supported in the crank and if you use to much shim it might not be supported properly depending on the length of the pilot.
Is it enough if TC pilot goes into the crank pilot about 1/8"? I would think, as long as it has ANY engagement it would be fine, but maybe it's not that simple?
Old 05-10-2011, 06:19 AM
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Originally Posted by Vetal
Is it enough if TC pilot goes into the crank pilot about 1/8"? I would think, as long as it has ANY engagement it would be fine, but maybe it's not that simple?
That's kind of why build height of the TC is so important. I would think that most manufacturers check this but it could be an issue if its not and the OAH is to short. The LS1 pilots are pretty long so I would think that in most cases it is in the crank more than an 1/8.
Old 05-10-2011, 04:51 PM
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good info here, this should be a stickie
Old 05-10-2011, 05:47 PM
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Originally Posted by Vince B
That's kind of why build height of the TC is so important. I would think that most manufacturers check this but it could be an issue if its not and the OAH is to short. The LS1 pilots are pretty long so I would think that in most cases it is in the crank more than an 1/8.
I'm concerned because with flexplate bolted and TC is put on th flexplate, it engages into crank pilot about 1/8". I didn't measure spacing between flexplate and TC yet, it might be that if gap is more than 1/8", I would have to use spacers and pilots will engage even less
Old 05-10-2011, 09:19 PM
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Originally Posted by Vetal
I'm concerned because with flexplate bolted and TC is put on th flexplate, it engages into crank pilot about 1/8". I didn't measure spacing between flexplate and TC yet, it might be that if gap is more than 1/8", I would have to use spacers and pilots will engage even less
I can't understand what you typed ther
Old 05-11-2011, 01:47 AM
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Originally Posted by z99ls1
I can't understand what you typed ther
Which part exactly? Or everything?
Old 05-11-2011, 10:58 PM
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When is finish line having their next sale or is their one going on, I need a 4l80e bad lol
Old 05-12-2011, 01:36 AM
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Originally Posted by Vetal
Which part exactly? Or everything?
The sentences don't make sense. Try rephrasing it maybe? The sentences run on together and don't really say anything
Old 05-15-2011, 06:54 PM
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I have a 1/4" gap between the converter (4L80) pads and flexplate. Is it OK, or do I have to put shims? I don't want to use shims because my TC pilot seems a bit too short, and if I put some washers, it will not center in the crank (now with TC bolted up, it would engage in the crank about 1/8"). What do you recommend?
Old 05-18-2011, 07:14 PM
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Vince, could you please comment on my 1/4" gap between flexplate and TC pads?
Old 05-18-2011, 07:49 PM
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either way you have to get your gap right or **** will get messed up


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