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Canadian Poncho Homepage -> Canadian Poncho -> General Engine Performance Forum -> what bolts and nuts do i use to bolt my torque converter to the flexplate
Post Info TOPIC: what bolts and nuts do i use to bolt my torque converter to the flexplate
Stephenzone


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what bolts and nuts do i use to bolt my torque converter to the flexplate
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I've always been a shifty guy and had manual transmission but the latest project the 70 rag has a 350/350 combo. i bought the car with no motor but had a spare 70 LT1 laying around and have since then acquired a used turbo 350. also in my scavenging i got a fairbank streetaction torque converter. but i can't find any bolts. i'm figuring there must be plenty of torque between the 2 so i'm figuring something from CTC is not recommended. from what i can see in the manuals it show 3 bolts but no measurements or which direction of the bolt. this torque converter has the flanges for 6 bolts.



on another note i was in a friends shop this morning bench racing as always, when a friend of mine who is doing the body work on anothers friends 67 beaumont mentioned that he had heard about this great web site called Canadian Poncho. should have seen his eyes bug out when i open my coat and i was wearing my favorite white CP T-shirt

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sTevE

55 GMC, 70 Pontiac 2+2 rag
eeluddy


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Just go to a tranny shop and get them or a GM dealer. They are a unique item and need to be the proper grade and length.

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JerryA


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The bolts go in from the flex plate side . It has been a while for me to but I think they are 3/8 or 7/16. Any auto parts store will have them. Also, make sure you use some lock tite on these

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Stephenzone


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thanxs for the bolt direction. I'll take the flex plate and torque converter with me tomorrow to napa. no tranny shops in town and i'm not to sure about the local gm dealer. last time i was there the young girl said they had nothing on their computer for pontiacs before 78. one answer i got today was minimum grade eight and fine thread and oh ya to lock-tite. because its an aftermarket converter it will need 2 different lengths in bolt. the secondary tabs are 1/4" thick.

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sTevE

55 GMC, 70 Pontiac 2+2 rag
4SPEED427


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Is it a bolt/nut combo? I can't really tell in the pic. Or is it a threaded converter and you just run a bolt through the flywheel into it?

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Stephenzone


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local gm notta. all he could find was something that screwed into the converter. local napa cross referenced some aftermarket catalogue and said 3 - 3/8, fine thread, grade 8, 1 inch long, 3 same but 3/4 long plus 6 star washers and grade 8 nuts. ordered from the local bolt place CCS. will have in my hot sweaty hands tomorrow.

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55 GMC, 70 Pontiac 2+2 rag
427carl


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right on!!   fine thread grade 8     I bought some for my clutch at local bolt shop

-- Edited by 427carl on Tuesday 12th of January 2010 08:57:01 PM

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66 Beau


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Lock-Tite them on too! Do the same for the ones on the flywheel-to-crank.



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67custom


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The proper bolts from GM are 3987930 but these are for the converter with threaded nuts built onto the convertor. There seems to be some discontent with GM dealers, what do you think Elroy, should i start a site for genuine GM parts, its amazing what is still available from the big guy, just have to find the right guy.

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