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Old 05-22-2007, 12:35 PM   #1
Daves72'GMC
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Smile Torque converter bolt ?

I have a 72' GMC with a turbo 400 and the 4 bolts were loose on the torque converter to the fly wheel. I tighten them. If they loosen up again what is the best way to keep them from loosening up again? Thank you.
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Old 05-22-2007, 12:39 PM   #2
airdale94
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Re: Torque converter bolt ?

Probably just whoever installed them last. But you could use some Locktite if they do loosen up. Don't use the stuff for rod bolts though,(red). Use some liter application, like the blue.
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Old 05-22-2007, 12:40 PM   #3
rikbar
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Re: Torque converter bolt ?

Blue locktite maybe
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Old 05-22-2007, 01:11 PM   #4
Daves72'GMC
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Re: Torque converter bolt ?

Thank you.
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Old 05-22-2007, 06:10 PM   #5
Longhorn Man
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Re: Torque converter bolt ?

on a side note, inspect the holes on the flywheel for cracks, very common if the converter was loose
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Old 05-22-2007, 06:48 PM   #6
pharcydekm
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Re: Torque converter bolt ?

When I owned the shop we installed a trans in a customers truck that the converter bolts cam loose twice. Th third time we used blue loctite and has been fine since. That was almost 3 years ago.
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Old 05-22-2007, 08:42 PM   #7
kwmech
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Re: Torque converter bolt ?

sounds like you are either missing 2 bolts or have 1 too many.
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Old 05-22-2007, 09:18 PM   #8
Longhorn Man
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Re: Torque converter bolt ?

I was wondering about that myself... but couldn't remember on the TH400 (I've always run TH350's) but I now remember I have a 400 converter in my 350, and it only has 3 bolts.
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Old 05-22-2007, 09:30 PM   #9
Mudder
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Re: Torque converter bolt ?

3 bolts and blue locktite.
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Old 05-22-2007, 10:17 PM   #10
kwmech
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Re: Torque converter bolt ?

I put a 6 bolt allison style convertor in my 68 with the t400 along with the art carr low gear set.
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Old 05-22-2007, 10:23 PM   #11
Longhorn Man
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Re: Torque converter bolt ?

interesting tidbit for the swappers here... a 6 bolt converter can be used on a 3 bolt flex plate. 3 of them will line right up no problem, and you just ignore the other 3
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