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Old 11-15-2010, 10:59 AM   #1
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pinion yoke vs u joint strength

I need to replace my pinion yoke and have been looking into various options to gain the most strength possible. the differential is a 1990 3.23 posi disc brake unit. The driveshaft is the stock unit for now although i could replace it at a later date.

1; the stock pinion yoke with a Lakewood 23011 high performance cold forged non cross drilled u-joint

2; the chevy astro-van pinion yoke with a1350 size u-joint and the neapco 2-1153 conversion u joint (hot forged and cross-drilled with a grease fitting)

It seems to me that the larger u-joint and pinion yoke would be the better of the two, but i'm not sure.
I haven't been able to locate a cold forged non cross drilled performance conversion joint but there may be one out there. that woulld seem to be the best bet.
I realize that to see any benefit from either idea i would have to replace the front u joint as well, and in the case of the 1350 conversion the trans yoke would need to be swapped out. right now though I am only concerned with the pinion yoke.

I have also seen forged steel yokes on the market, but have not seen them offered for either of these two options, does anyone know who offers them?

Thank's in advance for your opinions/ ideas!
Eric B
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Old 11-15-2010, 11:07 AM   #2
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Re: pinion yoke vs u joint strength

Is the yoke really a weak point in a 7.5 10 bolt?
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Old 11-15-2010, 02:14 PM   #3
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Re: pinion yoke vs u joint strength

Good point Apeiron, I was asking because I need to replace it anyway and I can do either for about the same cost.
My question centered around the u-joint as much as the yoke. would the u-jount be considered a weak point? And if so, which way would be the best?
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Old 11-15-2010, 02:34 PM   #4
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Re: pinion yoke vs u joint strength

The only reason to put a 1350 pinon yoke on a 10bolt would be if you're getting an upgraded driveshaft that has 1350 ujoints. Don't bother putting one on only to convert it back to a stock drive shaft with a conversion yoke.. The conversion yokes are a weak point and should be avoided.
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Old 11-15-2010, 03:01 PM   #5
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Re: pinion yoke vs u joint strength

mike, if you meant conversion u-joint I understand. my intention is to convert to a 1350 driveshaft at a later date when funds permit.
Apeiron's question is still pertinent, are any of these pieces worth adding to a 10 bolt?
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Old 11-15-2010, 05:18 PM   #6
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Re: pinion yoke vs u joint strength

There are several other parts in the 7.5 that will let go before the yoke or u joint. The 3R u joint is amost the same size as a 1330 u joint, so it's plenty strong. If you had plans of upgrading to a 12 bolt or 9 inch in the future and wanted to get a 1350 drive shaft made then I can see where you woudl want to go with the 1350 u joint, but chances are that you will have to modify the drive shaft later to work with the 12 bolt or 9 inch anyway.
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Old 11-15-2010, 05:23 PM   #7
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Re: pinion yoke vs u joint strength

i put a 1350 pinion yoke on myt old 10 bolt, but that was just because i had a new driveshaft made with 1350 joints, and i didnt want a conversion joint in the rear since a new 9" rear was in the works.

like said above, no point upgrading the yokes and using conversion joints to the driveshaft.

but, if you really want to do this, i still have the 1350 10 bolt pinion yoke on the shelf, should still ahve the seal too, if you are interested.
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Old 11-15-2010, 10:33 PM   #8
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Re: pinion yoke vs u joint strength

Thank's guys for the quick answers and valued opinions!
Freddie, I'll be giving you a call tomorrow about what we talked about on the phone a few days back. i'll still be needing that part.
Thank's again everyone!
Eric B
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86 camaro, 1984 383, pro topline vortecs, all comp components,stainless valves, scat crank,wiseco forged pistons,9.5:1,6"scat I beam 7/16" capscrew rods,comp xs282s, performer rpm, 750 proform vac sec, msd in cap coil/module, no computer,hooker coated 2460's w 6767 y pipe,AJE K-member & a arms, coil over kyb agx,700r4,pioneer shift kit,corvette servo,2600 stall, 9 bolt 3.70 posi, poly suspension , hotchkiss lca's,275-60/15 mt et street radials on 8" weld pro stars
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Old 11-15-2010, 10:33 PM
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