Drive shaft to rear end, bolts & "caps" - The 1947 - Present Chevrolet & GMC Truck Message Board Network

seanu · 01-31-2008, 07:02 AM

I recently changed out the rear end on my 70 frame to a 71/72 rear end (to convert to 5 lugs)...and noticed after I slid the u-joint back into place and then went to put the bolts and caps back on..that the spacing and I think the bolt size is not the same...

I'm sure I can run to the hardware store and buy the proper bolts..but does anyone sell the "caps"?

thanks

Luvlegs · 01-31-2008, 07:22 AM

so the differential yokes are different sizes from the 70 to 71/72?
I guess that's answering a question with another question and I'm not really even doing that.... just clarifying.

seanu · 01-31-2008, 07:25 AM

Well, unless someone changed out the rear end in the 70 I have with something else..then they must be differernt. But it was definitly a 67-70 rear end I took out.

seanu · 01-31-2008, 01:23 PM

So..does any body sell the u-join caps?

**tll74** · 01-31-2008, 01:49 PM

I believe your dealing with to different yokes. The 70 C10 should of been a Spicer 1310 1 1/16 cap with a 3 1/4 cross and u-bolts. The new rearend probably has a (I think) Spicer 1330 which is 1 1/16 cap with a 3 5/8 cross and bolts and straps. Either change the yokes but dangerous if you over tight the nut or under tighten. Second option use a hybrid u-joint. One half that fits your driveline and the other half fits the new yoke. Most parts guys give the deer in the headlights look when you as for it but it is available. The larger u-joint is commonly found in big block trucks. Hope this helps.

seanu · 01-31-2008, 02:53 PM

Well that sounds like it makes sense...except the U-joint fits into the yoke on the rear end correctly..but the bolts and straps that came off of the 70 yoke, will not fit the 71/72 yoke...

I found a set of u-bolts I had for another yoke..but that won't work..since I need the bolts and straps..

**tll74** · 02-01-2008, 01:53 PM

So.....both yokes use the bolts and straps? And the u-joint fits both of them? If so.......this doesn't make sense, all small u-joint strap type yokes are the same. All 12 bolts 1970 and earlier use u-bolts and 71-up are strap type to bolt in the u-joint. HHMMMMMM

01-31-2008, 07:02 AM	#1
seanu Too many projects!!! Join Date: Jul 2000 Location: Jacksonville, Florida Posts: 508	Drive shaft to rear end, bolts & "caps" I recently changed out the rear end on my 70 frame to a 71/72 rear end (to convert to 5 lugs)...and noticed after I slid the u-joint back into place and then went to put the bolts and caps back on..that the spacing and I think the bolt size is not the same... I'm sure I can run to the hardware store and buy the proper bolts..but does anyone sell the "caps"? thanks __________________ Sean 1995 Buick Roadmaster Sedan 2004 Chevy Trailblazer 5.3L V8 1963 Chevy Biscayne 4D Sedan 1971 Chevy C10 (now have 70 cab & frame) 1968 Chevy C10 (parts for the 70) 1991 Oldsmobile Custom Cruiser (Chevy 355 motor) 1937 Pontiac 8 4D Touring Sedan (in pieces) Jacksonville, Florida

01-31-2008, 07:22 AM	#2
Luvlegs Registered User Join Date: Sep 2005 Location: Smith Mountain Lake Virginia Posts: 1,537	Re: Drive shaft to rear end, bolts & "caps" so the differential yokes are different sizes from the 70 to 71/72? I guess that's answering a question with another question and I'm not really even doing that.... just clarifying. __________________ "A cat will almost always blink when hit between the eyes with a ball peen hammer" (you don't always have to state the obvious) Wear your PPE! You can eat with false teeth but you can't see with a false eye. 1959 Studebaker Silverhawk 350/400 1972 C10 L6 3OTT 2005 F350 - Built - whew! Last edited by Luvlegs; 01-31-2008 at 07:23 AM.

01-31-2008, 07:25 AM	#3
seanu Too many projects!!! Join Date: Jul 2000 Location: Jacksonville, Florida Posts: 508	Re: Drive shaft to rear end, bolts & "caps" Well, unless someone changed out the rear end in the 70 I have with something else..then they must be differernt. But it was definitly a 67-70 rear end I took out. __________________ Sean 1995 Buick Roadmaster Sedan 2004 Chevy Trailblazer 5.3L V8 1963 Chevy Biscayne 4D Sedan 1971 Chevy C10 (now have 70 cab & frame) 1968 Chevy C10 (parts for the 70) 1991 Oldsmobile Custom Cruiser (Chevy 355 motor) 1937 Pontiac 8 4D Touring Sedan (in pieces) Jacksonville, Florida

01-31-2008, 01:23 PM	#4
seanu Too many projects!!! Join Date: Jul 2000 Location: Jacksonville, Florida Posts: 508	Re: Drive shaft to rear end, bolts & "caps" So..does any body sell the u-join caps? __________________ Sean 1995 Buick Roadmaster Sedan 2004 Chevy Trailblazer 5.3L V8 1963 Chevy Biscayne 4D Sedan 1971 Chevy C10 (now have 70 cab & frame) 1968 Chevy C10 (parts for the 70) 1991 Oldsmobile Custom Cruiser (Chevy 355 motor) 1937 Pontiac 8 4D Touring Sedan (in pieces) Jacksonville, Florida

01-31-2008, 01:49 PM	#5
tll74 "Junkyard Dog" Join Date: Jan 2008 Location: Springfield Oregon Posts: 2,527	Re: Drive shaft to rear end, bolts & "caps" I believe your dealing with to different yokes. The 70 C10 should of been a Spicer 1310 1 1/16 cap with a 3 1/4 cross and u-bolts. The new rearend probably has a (I think) Spicer 1330 which is 1 1/16 cap with a 3 5/8 cross and bolts and straps. Either change the yokes but dangerous if you over tight the nut or under tighten. Second option use a hybrid u-joint. One half that fits your driveline and the other half fits the new yoke. Most parts guys give the deer in the headlights look when you as for it but it is available. The larger u-joint is commonly found in big block trucks. Hope this helps.

01-31-2008, 02:53 PM	#6
seanu Too many projects!!! Join Date: Jul 2000 Location: Jacksonville, Florida Posts: 508	Re: Drive shaft to rear end, bolts & "caps" Well that sounds like it makes sense...except the U-joint fits into the yoke on the rear end correctly..but the bolts and straps that came off of the 70 yoke, will not fit the 71/72 yoke... I found a set of u-bolts I had for another yoke..but that won't work..since I need the bolts and straps.. __________________ Sean 1995 Buick Roadmaster Sedan 2004 Chevy Trailblazer 5.3L V8 1963 Chevy Biscayne 4D Sedan 1971 Chevy C10 (now have 70 cab & frame) 1968 Chevy C10 (parts for the 70) 1991 Oldsmobile Custom Cruiser (Chevy 355 motor) 1937 Pontiac 8 4D Touring Sedan (in pieces) Jacksonville, Florida

02-01-2008, 01:53 PM	#7
tll74 "Junkyard Dog" Join Date: Jan 2008 Location: Springfield Oregon Posts: 2,527	Re: Drive shaft to rear end, bolts & "caps" So.....both yokes use the bolts and straps? And the u-joint fits both of them? If so.......this doesn't make sense, all small u-joint strap type yokes are the same. All 12 bolts 1970 and earlier use u-bolts and 71-up are strap type to bolt in the u-joint. HHMMMMMM



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