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Yesterday, 06:46 PM
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#1 |
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Registered User
Join Date: Sep 2014
Location: owensboro, ky
Posts: 25
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u joint
On my 67 c10 i'm pretty sure the 12 bolt differential is original to the truck. The u-joints should be 1310s, I think. after installing them I realized I have about a 16 of an inch slop side to side in the pinion yoke, between the two tabs. Measuring between the two tabs I get 3.279. The 1310 measures 3.219 so that gives me the 16 of an inch. I have looked at Spicers u joint catalog and can not locate a u joint that measures 3.279. Is there a u joint that measures 3.219 and 3.279 the other? I know they make conversion u joints but those convert from one cap diameter to another. Is the 16 of an inch going to be an issue? I would think so but don't know for sure. Anyone run across this can shed some light on it for me.
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Yesterday, 07:06 PM
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#2 |
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Registered User
Join Date: Sep 2014
Location: owensboro, ky
Posts: 25
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Re: u joint
the tabs look different, almost like some has been removed from the left one
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Yesterday, 07:26 PM
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#3 |
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Registered User
Join Date: Mar 2015
Location: washington
Posts: 2,159
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Re: u joint
I also think you may be looking in the wrong place. Check the flange, maybe another member has one they can measure for you?
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Yesterday, 08:35 PM
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#4 |
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Post Whore
 
Join Date: Feb 2016
Location: Portland Oregon
Posts: 10,803
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Re: u joint
I believe the yoke is damaged or someone has modified it. I found I had a bad yoke on my Burban some time back. I believe it is caused by tightening the U-joint down when one or both bearing caps are no properly located in the yoke.
Photos are from my bad one. The distance from the inside edge of each tab to the center of the pinion shaft should be exactly the same. See my crude drawing.
__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.  RIP Bob Parks. 1967 Burban the WMB,1991 S(stink)-10 Blazer,1969 GTO, 1970 Javelin, 1952 F2 Ford 4X4, 29 Model A, 72 Firebird. 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 Last edited by HO455; Yesterday at 08:41 PM. |
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Yesterday, 09:37 PM
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#5 | |
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Born Psycho
Join Date: Feb 2001
Location: brentwood,cal,usa
Posts: 4,739
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Re: u joint
Quote:
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jerry moss 72 cheyenne super K20- tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,tow hooks,bumper guards,toolbox,aux. fuel tank,posi front and rear,plus other goodies!!! SOLD 69 suburban K20-tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,4 inch all spring lift,4 speed, 14 bolt full floater, dana 44 HD,warn winch,posi front and rear,tow hooks,plus other goodies. 73/80 chevy/gmc K20 SB400,turbo 400,205,tilt,a-c,gas hog. 77 K/5 cheyenne blazer-daily driver/beater. SON HAS IT NOW BRENTWOOD,CALIFORNIA |
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Today, 03:13 PM
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#6 |
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Registered User
Join Date: Apr 2010
Location: So Cal
Posts: 1,413
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Re: u joint
Someone may have dropped a needle into the cap, making it too wide.
Could the cap shear the metal off when tightened without the bolts or something else breaking? Could some guy chiseled the tab to make it fit?
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'67 GMC 2500, 292, 4spd, AC |
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Today, 03:54 PM
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#7 |
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Senior Member
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,389
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Re: u joint
Straps are supposed to be a one time use. When to bolt gets tightened down they will actually stretch some to lock the u-joint cap down. when that doesn't happen the cap will spin and act like a small lathe and remove the end tab/s. If you look at the old cap it should have a polished circle where it was spinning.
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