C6 Torque Converter - Help

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Aug 8, 2010 | 07:41 PM

Kirbys73F100

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From: Lawrenceville, Ga

C6 Torque Converter - Help

I have a 1971 429 and C6 in my truck. I recently bought a slightly used 2,400 stall torque converter for it. The crank pilot bottoms out before the studs go through the flex plate. Can anyone tell me what is going on here?

The guy told me the converter was in a 351w/C6.

Aug 8, 2010 | 11:32 PM

85e150

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Gee, maybe a 351w TC isn't the same as a 429 model. Check the manufacturer's website for your model number vs. what's shown for a 429.

Like so:

TCI - TORQUE CONVERTERS: Application Chart

Aug 8, 2010 | 11:41 PM

Kirbys73F100

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From: Lawrenceville, Ga

Quote:

Originally Posted by 85e150six4mtod

Gee, maybe a 351w TC isn't the same as a 429 model. Check the manufacturer's website for your model number vs. what's shown for a 429.

Like so:

TCI - TORQUE CONVERTERS: Application Chart

Gee maybe Summit's website says it is the same.. Do your research before being an ***. Also, try reading my entire post completely before responding. I bought a used torque converter and the po didn't have any brand or part number information for me. If he did, I would have posted it.

Like so:
Boss Hog 26060 - Boss Hog Night Stalker Torque Converters - Overview - SummitRacing.com

Aug 9, 2010 | 12:01 AM

85e150

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Sorry, I see now even on the link I posted that 351w and 429 are supposed to be the same.

However, you don't really know what you have, do you? And you didn't say that in your post, so don't expect people to read your mind.

Measure the input shaft diameter, maybe you have an FE model. (1.85 vs. 1.375")

Aug 9, 2010 | 03:52 AM

Lazy K

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There are at least two (maybe three) different "pilots" used with C6 torque converters. Which one it is depends on the year the C6 was used, not on the engine type, I believe.

Aug 9, 2010 | 02:39 PM

85e150

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Looking for the 3rd time, I see:

<TABLE border=1 cellSpacing=0 borderColor=#000000 cellPadding=2 width=643><TBODY><TR><TD bgColor=#e1e1e1 vAlign=top width=215 noWrap>C6 1971-91, 289, 302, 351, 400,
429, 460 cid with 1.375" crank pilot*</TD><TD bgColor=#e1e1e1 vAlign=top align=middle>441638
</TD><TD bgColor=#e1e1e1 vAlign=top width=43 align=middle>441600

</TD><TD bgColor=#e1e1e1 vAlign=top width=58 align=middle>441000

441001 <SUP>1

</SUP></TD><TD bgColor=#e1e1e1 vAlign=top width=69 align=middle>441300

441301 <SUP>1

</SUP></TD><TD bgColor=#e1e1e1 vAlign=top width=68 align=middle>441322

441302<SUP>1

</SUP></TD><TD bgColor=#e1e1e1 vAlign=top width=68 align=middle>441303<SUP>1</SUP>

</TD></TR><TR><TD bgColor=#e1e1e1 vAlign=top width=215 noWrap>C6 1971-91, with 1.250" crank pilot*</TD><TD bgColor=#e1e1e1 vAlign=top align=middle></TD><TD bgColor=#e1e1e1 vAlign=top width=43 align=middle>441612

</TD><TD bgColor=#e1e1e1 vAlign=top width=58 align=middle></TD><TD bgColor=#e1e1e1 vAlign=top width=69 align=middle>441312
</TD><TD bgColor=#e1e1e1 vAlign=top width=68 align=middle>441321 <SUP>1

</SUP></TD><TD bgColor=#e1e1e1 vAlign=top width=68 align=middle></TD></TR><TR><TD bgColor=#e1e1e1 vAlign=top width=215 noWrap>C6 1966-84 332, 360, 390, 406, 427,
428, (1967-71 429) cid with 1.850
crank pilot</TD></TR></TBODY></TABLE>

Two sizes in the same year range for the 429. One matches the 351w etc, the other matches the FE.

Aug 9, 2010 | 02:42 PM

85e150

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https://www.ford-trucks.com/forums/9...ml#post9197993

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Aug 9, 2010 | 03:33 PM

Rogue_Wulff

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From: Lost

Silly question, but any chance the crank has a pilot bushing/bearing still in it from formerly having a manual trans behind it?
You didn't say if you've ever had the 429/C6 combo together before or not, and your sig lists it as a "project", so I hafta ask........

Aug 9, 2010 | 04:16 PM

#10

Kirbys73F100

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From: Lawrenceville, Ga

Quote:

Originally Posted by Rogue_Wulff

Good question but it doesn't. I have recent news though. The converter studs on the stock one are 3/8 and the new ones are 7/16.

Aug 9, 2010 | 05:35 PM

#11

Bullitt390

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Yeah, you have to drill out the flexplate for most aftermarket convertors.

Josh

Aug 9, 2010 | 09:08 PM

#12

DLP Performance

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Quote:

Originally Posted by Kirbys73F100

Good question but it doesn't. I have recent news though. The converter studs on the stock one are 3/8 and the new ones are 7/16.

Wow, that should be a really good convertor! Enlarge the holes & butt it up. Let us know.

Aug 9, 2010 | 11:06 PM

#13

Kirbys73F100

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From: Lawrenceville, Ga

Update as of this afternoon:

Used a caliper to measure the crank pilot journal to be 1.250" and the new converter to be 1.375". SO, I took the grinder to the converter and shaved an 1/8th off the crank pilot. I didn't see this being a big issue considering the stock converter's crank pilot was an inch shorter and had a larger diameter and therefore didn't even enter the crank pilot hole. Since I had the flex plate unbolted, I sat it on the new converter and the studs and holes are the correct size. I haven't put it back together yet but when I get time, I will let ya'll know how it goes.