Locating tab on trans case for u-joint but not on rear diff? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Gene · 03-18-2011, 07:16 PM

So i'm using a rear from a 91 Burb that doesnt have any locating tabs for the u-joint, but my trans case does? Do I need to find some caps that have them or what? I didnt get any caps with the rear and dont know if they sell them at parts stores?

Transformula · 03-18-2011, 07:42 PM

THose tabs you speak of are on yokes that accept "External-snap-ring" types of u-joints. The yoke without the tabs is for accepting an "Internal- snap-ring" type of u-joint. Do you have a 10-bolt rear? I've seen a lot of 10-bolts with those type, and the older 12- bolts have the external type. You will most likely have to change the yoke, or use a conversion u-joint.
Look at your driveshaft. Where the u-joint is attached, can you see the snap rings on the outside?

Gene · 03-18-2011, 08:28 PM

Quote:

Originally Posted by Transformula

THose tabs you speak of are on yokes that accept "External-snap-ring" types of u-joints. The yoke without the tabs is for accepting an "Internal- snap-ring" type of u-joint. Do you have a 10-bolt rear? I've seen a lot of 10-bolts with those type, and the older 12- bolts have the external type. You will most likely have to change the yoke, or use a conversion u-joint.
Look at your driveshaft. Where the u-joint is attached, can you see the snap rings on the outside?

Yep, I had new u-joints installed and they are external clips. Guess I need internal ones? It is a 10 bolt rear. I have a 12 bolt truck rear, can I simply switch the yokes?

Transformula · 03-18-2011, 11:10 PM

I'm pretty sure the spline count and diameter of the pinion is different from 12 bolt to 10 bolt. So you will have to get a new 1310 or 1350 yoke. Those are already set up for a 1310 or 1350 u-joint with tabs. (You can specify which one you want). If you have a reputable driveline shop nearby, ask if they have a conversion u-joint that will connect your shaft to the 10-bolt yoke. I know they make them for going from a 1310 to a 1350, etc, but those are both external ring type. But in reality, I think that getting the yoke is the best bet IMO.

03-18-2011, 07:16 PM	#1
Gene Registered User Join Date: Aug 2002 Location: Muskogee, Oklahoma Posts: 2,914	Locating tab on trans case for u-joint but not on rear diff? So i'm using a rear from a 91 Burb that doesnt have any locating tabs for the u-joint, but my trans case does? Do I need to find some caps that have them or what? I didnt get any caps with the rear and dont know if they sell them at parts stores?

03-18-2011, 07:42 PM	#2
Transformula Registered User Join Date: Nov 2010 Location: Las Vegas, Nevada Posts: 160	Re: Locating tab on trans case for u-joint but not on rear diff? THose tabs you speak of are on yokes that accept "External-snap-ring" types of u-joints. The yoke without the tabs is for accepting an "Internal- snap-ring" type of u-joint. Do you have a 10-bolt rear? I've seen a lot of 10-bolts with those type, and the older 12- bolts have the external type. You will most likely have to change the yoke, or use a conversion u-joint. Look at your driveshaft. Where the u-joint is attached, can you see the snap rings on the outside? __________________ T.Y.N Custom Works..... Because "Stock" Sucks! 1971 K 10 GMC Long Bed 1977 Formula T/A Frame off Resto-Mod 1995 FXDL Harley Low Rider 1985 C10 ShortWide 91 Burb front.

03-18-2011, 11:10 PM	#4
Transformula Registered User Join Date: Nov 2010 Location: Las Vegas, Nevada Posts: 160	Re: Locating tab on trans case for u-joint but not on rear diff? I'm pretty sure the spline count and diameter of the pinion is different from 12 bolt to 10 bolt. So you will have to get a new 1310 or 1350 yoke. Those are already set up for a 1310 or 1350 u-joint with tabs. (You can specify which one you want). If you have a reputable driveline shop nearby, ask if they have a conversion u-joint that will connect your shaft to the 10-bolt yoke. I know they make them for going from a 1310 to a 1350, etc, but those are both external ring type. But in reality, I think that getting the yoke is the best bet IMO. __________________ T.Y.N Custom Works..... Because "Stock" Sucks! 1971 K 10 GMC Long Bed 1977 Formula T/A Frame off Resto-Mod 1995 FXDL Harley Low Rider 1985 C10 ShortWide 91 Burb front.



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