C6 Torque Converter - Help

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Aug 8, 2010 | 07:37 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 | 08:32 PM

mikeo0o0o0

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From: Stanley, VA

There are two pilot sizes on a C6, 1.848" & 1.375"
Check the bore of your crankshaft vs. the OD of the torque converter pilot.

Aug 8, 2010 | 09:20 PM

Kirbys73F100

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From: Lawrenceville, Ga

I was attempting to do some research just by comparing converters on Summit Racing and picked up on the diameter differences but here's a couple questions for you. I see now that the crank pilots on the original and stall are different lengths as well as diameters.
1) Does each diameter always correspond to a specific length of the crank pilot?
2) Does each diameters always correspond to specific engines or years of engines? Or are they arbitrarily made?

I have since found another used converter that fits a 302. I emailed the guy and asked him to provide the pilot diameter. Do you think it will fit?

Thanks for your help!

Aug 8, 2010 | 10:17 PM

mikeo0o0o0

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From: Stanley, VA

Sorry, I don't know the answers to those questions but someone who does will probably chime in.

Aug 9, 2010 | 02:43 PM

85e150

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Don't buy the 302 TC, see chart posted here, two sizes for 429 in same model year range:

C6 Torque Converter - Help - Ford Truck Enthusiasts Forums

Duplicate thread.