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Old 05-09-2013, 09:56 AM
gearheadslife's Avatar
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Torque converter bolt patterns

If iirc the g.m. th350/375/400 use the same bolt patern,
is the 7004r pattern the same.. is the 200r4 the same..



looked in the wiki links and did not find the bolt patterns..

I ask as I'll be needing a flexplate for my truck and like to get the correct one.. the engine isn't out to measure the t/c pattern and then go to parts store and check before I buy..
cause you know how this will work, I'll ASSume and after the store is closed, have to get another..

thanks..
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Old 05-14-2013, 08:58 PM
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Not sure about all of them. Pulled 350 tranny out of my 77 nova and bolted my 200 4r right on in. So i'm guessing that all the flex plates for that year were like most other flex plates for the v-8's.
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Old 05-14-2013, 09:34 PM
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I bolted up my 700-R4 to the flexplate that came on my GM crate 350. I would assume they are the same.
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Old 05-15-2013, 08:08 AM
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just to add this to this thread so when someone searches it helps them..

is there a list somewhere..
try'n to get the oem patterns for
th350 [COLOR=red]- 10.75[/COLOR]
th400 [COLOR=red]- 11.5[/COLOR]
2004r [COLOR=red]- 10.75[/COLOR]
7004r [COLOR=red]- 10.75[/COLOR]


I bought mine and measured the bolt pattern from hole center to hole center and it was 11" and lines up with my extra th350 I have that I forgot I had ..OOPS

so I'm thinking the 10.75" is from inner edge of hole to inner edge of hole..

anyways.. hope this helps others..

FYI these pattern # are factory...
aftermarket converters don't always follow these ..
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