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  #31  
Old 12-15-2012, 03:05 PM
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Since there seems to be some confusion, I went out and measured a sampling of the crankshafts I have on hand. The results are below.

Casting.....inner.....outer
2Y...........1.250....1.848 (early 1968 460 crank)
3Y...........1.375....1.848 (later post 1979 crank)
4U...........1.375....1.825 (1973 429 crank)

As stated previously, the applicable pilot holes are 1.848 and 1.375. The other dimensions are inconsequential.

You could certainly machine down a 1.850 converter to fit one of the later cranks, or a 1.375 converter to fit an early crank, but why bother unless you've already got the wrong part and you're unable to exchange it for the right one?

Hope this helps.
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Last edited by CarsByCarl; 12-15-2012 at 03:35 PM.
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  #32  
Old 12-17-2012, 08:31 AM
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Oh Carl what would I do without you. That helps a lot. I really appreciate it thanks!!

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  #33  
Old 12-17-2012, 09:12 AM
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So I need to buy a converter that states it has a 1.848 pilot crank. And that should work?

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  #34  
Old 12-17-2012, 11:05 AM
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Quote:
Originally Posted by 68montego View Post
So I need to buy a converter that states it has a 1.848 pilot crank. And that should work?
1.848" pilot is correct, but sometimes you will see it spec'd as being 1.85".

Basically what you have is a crank with the FE style pilot. If you ask for a converter to fit an FE engine (390, 428) you should be good.
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  #35  
Old 12-17-2012, 12:24 PM
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The part number for the TCI 1.250 tc is 441312. They made all 3 sizes,not just 2!
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  #36  
Old 12-17-2012, 01:10 PM
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Quote:
Originally Posted by 71gt View Post
The part number for the TCI 1.250 tc is 441312. They made all 3 sizes,not just 2!
No....the factory 1.848 pilot crank has a smaller/deeper 1.250 hole in it. It was never intended to be a pilot hole, and the factory never installed a 1.250 pilot converter in a 429/460 application.

TCI may very well make a converter with a pilot that fits in that hole, but only because they, or somebody ordering a converter from them didn't understand to proper configuration for 429/460 converters and pilots.

What I learned by measuring the cranks, is that the later 3Y crankshafts appear as if they'll work with either the early 1.848 pilot, or the late 1.375 pilot.
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Last edited by CarsByCarl; 12-17-2012 at 01:14 PM.
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  #37  
Old 12-17-2012, 01:14 PM
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So if it says 1.85 it will still work? Work has been slow for the last couple weeks and I feel like I shouldnt shell out a couple hundred dollars for a new converter. Found a couple of remanufactured ones on eBay think they might work. Says 120$ free shipping. This is the description

"Up for sale is a remanufactured C6 High Stall 2200-2500 Torque Converter.

Application: 1971+ 1974+ 300, 302, 351, 400, 460ci engine

Diameter 12.75"

Pilot Diameter 1.375" *call for 1.848"

Mount : 4 Studs

Spline : 31"

Would it be wise to go with remanufactured. They have excellent feedback. No complaints. Also would it be ok to grind the one I have down til it fits? Or does both parts of it have to seat perfect? I have no problem grinding it to fit in there. The part of it that's 1.25 fits fine. Wouldn't that center it for the most part?
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  #38  
Old 12-17-2012, 01:32 PM
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Quote:
Originally Posted by 68montego View Post
So if it says 1.85 it will still work? Work has been slow for the last couple weeks and I feel like I shouldnt shell out a couple hundred dollars for a new converter. Found a couple of remanufactured ones on eBay think they might work. Says 120$ free shipping. This is the description

"Up for sale is a remanufactured C6 High Stall 2200-2500 Torque Converter.

Application: 1971+ 1974+ 300, 302, 351, 400, 460ci engine

Diameter 12.75"

Pilot Diameter 1.375" *call for 1.848"

Mount : 4 Studs

Spline : 31"

Would it be wise to go with remanufactured. They have excellent feedback. No complaints. Also would it be ok to grind the one I have down til it fits? Or does both parts of it have to seat perfect? I have no problem grinding it to fit in there. The part of it that's 1.25 fits fine. Wouldn't that center it for the most part?
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I don't know anything about rebuilt converters from ebay. I give Edge Racing Converters all my business.

If you want to make your current converter fit, you'll have to have it turned down to the proper size in a lathe.
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  #39  
Old 12-17-2012, 02:13 PM
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Quote:
Originally Posted by CarsByCarl View Post
No....the factory 1.848 pilot crank has a smaller/deeper 1.250 hole in it. It was never intended to be a pilot hole, and the factory never installed a 1.250 pilot converter in a 429/460 application.

TCI may very well make a converter with a pilot that fits in that hole, but only because they, or somebody ordering a converter from them didn't understand to proper configuration for 429/460 converters and pilots.

What I learned by measuring the cranks, is that the later 3Y crankshafts appear as if they'll work with either the early 1.848 pilot, or the late 1.375 pilot.
Yes,I have ran into 2 of them with the 1.250 pilot. The first time I had a 1.375 converter setting on the shelf. When we put the converter up to the pilot hole it would not fit,so we measured and it was 1.250. But believe what you want. TCI wouldnt make it unless people ask for it.
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  #40  
Old 12-18-2012, 08:32 AM
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Thanks for the info guys. I'm gonna call some machine shops today to see if they can do it and for how much.

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  #41  
Old 12-18-2012, 09:06 AM
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Quote:
Originally Posted by 68montego View Post
I was thinking about getting it cut. Would be cheaper than buying a new converter.
I just bought a stock replacement converter w/ the proper nose from O'reilly's for $69+ core btw.
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  #42  
Old 12-19-2012, 01:35 AM
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Quote:
Originally Posted by 71gt View Post
Yes,I have ran into 2 of them with the 1.250 pilot. The first time I had a 1.375 converter setting on the shelf. When we put the converter up to the pilot hole it would not fit,so we measured and it was 1.250. But believe what you want. TCI wouldnt make it unless people ask for it.
Not to pour gasoline on the fire, but what the heck.

http://www.460ford.com/forum/showthread.php?t=150527

In the above thread Paul Kane talks about the pilot sizes and says:

"There are three converter pilot diameters for the 385 Series crankshafts that we have seen:
1.25"
1.375"
1.850"
For the most part, the 1.375" and 1.85" pilot diameters are for the 460/C6 engines. However, it seems that some of the very last 1967 Lincoln Continentals that received a 460 instead of the 462 MEL got the 1.25" pilot bored into their crankshaft, because 1.25" is the converter pilot diameter of the 462 MEL trans.

What I don't understand is why a 429 crankshaft would have a 1.25" pilot. I'm pretty sure the earlier Thunderbirds prior to the 429 came with FEs, not MELs. Are you sure it's not a 460 crankshaft? Or, are you measuring too deeply into the flange (is there a step in the bore at the rear of the crankshaft and you are reading the deeper of the two)?

Paul"

I can neither confirm nor deny this, but knowing how FoMoCo was back then I would not be surprised if some converters were made with a 1.25" pilot.

Steve
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  #43  
Old 12-19-2012, 01:58 PM
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Ok well in the first put the deeper hole where my finger is pointing measures 1.25". The second picture where the shallower hole that's between my fingers is much wider and measures at 1.848".

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  #44  
Old 12-19-2012, 02:08 PM
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Now on my torque converter it's the same size as the deep pilot in my crank. The only problem is that the converter pilot gets wide at the top where it should still be 1.25". And in my second one picture where Im pointing the rust ring is where it hits.

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  #45  
Old 12-19-2012, 05:06 PM
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Yes, that is what they call the 1.375" pilot. You can either have that outer part turned down to 1.25 or get a 1.848" "FE" converter which does not have the stepped part. Like Shluhar said you can get a stock reman for not much money.

Last edited by 68xr7cat; 12-19-2012 at 05:19 PM.
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