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Yoke Gaps?

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Old Jan 31, 2006 | 03:52 PM
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Default Yoke Gaps?

I have 1973 Vette with U-bolt style yokes (Standard). I was thinking of
replacing the U-bolts with those (HD style) gaps that are used in the HD
yokes. Are these Gaps direct fit to U-bolts style jokes? Then I just would need to get longer (and strong) bolts + nuts from hardware store...

Anyone tried this?
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Old Jan 31, 2006 | 04:59 PM
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The "HD" yokes are tapped 3/8-16 the std yokes are drilled out for the U-bolt to fit. You'll have to swap yokes. If they have less then .040" endplay don't bother until you need to.
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Old Feb 1, 2006 | 12:10 AM
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Originally Posted by gtr1999
The "HD" yokes are tapped 3/8-16 the std yokes are drilled out for the U-bolt to fit. You'll have to swap yokes. If they have less then .040" endplay don't bother until you need to.
I know that, but what if I just put the GAPs on a std joke and buy long enough bolts so that they come out from the jokes U-bolt holes and put a nut there to tighten the assembly??? The question is more like if the GAPs fit tight on to the STD yokes and do tighten the U-joint properly???

How do you measure a endplay, between which surfaces and how?

Are the STD yokes with U-bolt kit strong enough for 500hp BB with 4.11 rear end gears? That I a bit doubt...

Last edited by Vesa; Feb 1, 2006 at 01:16 AM.
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Old Feb 1, 2006 | 01:20 AM
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...about the endplay...I do have the dial gauge with magnetic base that I use for measuring the backlash between pinion and ring gear - can I use this gauge somehow to measure the endplay?
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Old Feb 1, 2006 | 06:36 AM
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I think you mean Yoke Caps not gaps. As Gary said, the factory HD caps are tapped for the bolts. You may be able to use longer bolts with nuts but I don't think the HD caps will match the standard yokes.

EDIT:
I re read Gary's post and maybe they are the same yokes.

Last edited by RHD '68 L89; Feb 1, 2006 at 06:39 AM.
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Old Feb 1, 2006 | 07:16 AM
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Originally Posted by RHD '68 L89
I think you mean Yoke Caps not gaps. As Gary said, the factory HD caps are tapped for the bolts. You may be able to use longer bolts with nuts but I don't think the HD caps will match the standard yokes.

EDIT:
I re read Gary's post and maybe they are the same yokes.
Sorry my bad english - yes Caps I mean!!!

Yes that I was thinking that maybe GM first used only Standard ones with U-bolts but when powerfull BBs came (L-88 etc...) they started to break and they started to call them HD by replacing the U-bolt with Caps and individual bolts...
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Old Feb 1, 2006 | 09:54 AM
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The hole spread is different from the u-bolt style to the BB style. If you tap the u-bolt style, the holes on the caps will not line up.
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Old Feb 1, 2006 | 10:39 AM
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Originally Posted by Van Steel
The hole spread is different from the u-bolt style to the BB style. If you tap the u-bolt style, the holes on the caps will not line up.
I see - you mean that the distance between the 2 holes in a Cap is different from the distance between the 2 holes in a U-bolt style yoke. Then it is a no go...
Thanks for the info!!!
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Old Feb 1, 2006 | 01:17 PM
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yep
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Old Feb 1, 2006 | 05:30 PM
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Of course,depending on your access to a machine shop, you might be able to machine caps and tap the yokes for a larger bolt. I haven't done this, as I just swap the yokes when changing from one to the other but maybe parts are harder for you to get over there?
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Old Feb 2, 2006 | 08:19 AM
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We thought about offering that but it doesn't look like there would be enough meat on the cap if the hole is moved out any further.
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