Rear u joint won't fit diff yoke?
Thread Starter
Race Director
Joined: Mar 2003
Posts: 11,608
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From: Eustis ( Area 51 Bat Cave ) Fl
Rear u joint won't fit diff yoke?
Okay, my car is still at the shop so I can't pop out and look,
I get a message from the tech today that while the body went on the chassis nice the rear u joint is too wide for the yoke on the diff.
The original car was a 69 small block car which the tech matched up the u joints on that 69 drive shaft when I bought new ones BUT the donor chassis was from an early 68 I have no idea if bb or sb and because the chassis was over hauled and rebuilt with vette brakes transverse kit and who knows what mismatched parts it has & I have no clue what is what.
So to try to be simple what would make the rear u joint too wide for the diff yoke?
Many thanks!
The bat vette is close to coming home....
I get a message from the tech today that while the body went on the chassis nice the rear u joint is too wide for the yoke on the diff.
The original car was a 69 small block car which the tech matched up the u joints on that 69 drive shaft when I bought new ones BUT the donor chassis was from an early 68 I have no idea if bb or sb and because the chassis was over hauled and rebuilt with vette brakes transverse kit and who knows what mismatched parts it has & I have no clue what is what.
So to try to be simple what would make the rear u joint too wide for the diff yoke?
Many thanks!
The bat vette is close to coming home....
Le Mans Master
Joined: Jan 2000
Posts: 8,918
Likes: 27
From: New Hill NC
Okay, my car is still at the shop so I can't pop out and look,
I get a message from the tech today that while the body went on the chassis nice the rear u joint is too wide for the yoke on the diff.
The original car was a 69 small block car which the tech matched up the u joints on that 69 drive shaft when I bought new ones BUT the donor chassis was from an early 68 I have no idea if bb or sb and because the chassis was over hauled and rebuilt with vette brakes transverse kit and who knows what mismatched parts it has & I have no clue what is what.
So to try to be simple what would make the rear u joint too wide for the diff yoke?
Many thanks!
The bat vette is close to coming home....
I get a message from the tech today that while the body went on the chassis nice the rear u joint is too wide for the yoke on the diff.
The original car was a 69 small block car which the tech matched up the u joints on that 69 drive shaft when I bought new ones BUT the donor chassis was from an early 68 I have no idea if bb or sb and because the chassis was over hauled and rebuilt with vette brakes transverse kit and who knows what mismatched parts it has & I have no clue what is what.
So to try to be simple what would make the rear u joint too wide for the diff yoke?
Many thanks!
The bat vette is close to coming home....
Thread Starter
Race Director
Joined: Mar 2003
Posts: 11,608
Likes: 780
From: Eustis ( Area 51 Bat Cave ) Fl
What I found on the Duntov site,
"65-79 Differential Pinion Flanges
These are reconditioned flanges, guaranteed to be perfect. The 65-70 unit is 3 7/8 inch across, while the 68-79 is the larger size, at just over 4 1/4 inches across. "
So there is odd overlap in years but mine could be the early/smaller yoke,
Now to figure out the easiest fix...
Le Mans Master
Joined: Dec 2007
Posts: 6,422
Likes: 591
From: McHenry Illinois
The easiest fix is a conversion u-joint, it has the 1310 size and the 1330 size, spicer 5-134X for the greasable one. 253 for the non grease style
Last edited by '75; Mar 29, 2015 at 07:45 PM.
Safety Car
Joined: Nov 2008
Posts: 3,720
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From: Seattle Washington
Keep in mind that Switching the Yoke could change the set up of the pattern of the Ring and Pinion. Although it has been done many times before. Also keep in mind that the U-Joint Straps that hold this u-Joint is a Corvette specific part. The Split between the Flange and Strap is not centered, the Straps are shorter than normal. This may or may not be true on Your specific car. Don't expect your local Auto parts store to have them. Napa doesn't. Corvette Central does.
Thread Starter
Race Director
Joined: Mar 2003
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From: Eustis ( Area 51 Bat Cave ) Fl
Keep in mind that Switching the Yoke could change the set up of the pattern of the Ring and Pinion. Although it has been done many times before. Also keep in mind that the U-Joint Straps that hold this u-Joint is a Corvette specific part. The Split between the Flange and Strap is not centered, the Straps are shorter than normal. This may or may not be true on Your specific car. Don't expect your local Auto parts store to have them. Napa doesn't. Corvette Central does.
According to the net my local stores like orielys autozone etc do carry spicer 5-134X u joint or a crossover which it would appear will mate my wide ds yoke to my narrow diff yoke...this will work right?
Race Director
Joined: May 2005
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From: Millington Illinois
St. Jude Donor '08-'09
The 1330 rear flange is 1968-1969 Auto and 1970-1979 all. the 1310 flange was used 1963-1967 and 1968-1969 4 speed. You can't change the flange out because the pinion shaft is different diameter and spline. The conversion Ujoint is the answer. I use the non greasable ones. Way stronger and you can't access it to grease it once installed in a vet.
It will work fine. Had one on my 63 when I got it.
Here you go. This is the non greasable one. Picture is wrong.
http://www.summitracing.com/parts/MOG-253/
This is the greasable version
http://www.summitracing.com/parts/mog-353/overview/
It will work fine. Had one on my 63 when I got it.
Here you go. This is the non greasable one. Picture is wrong.
http://www.summitracing.com/parts/MOG-253/
This is the greasable version
http://www.summitracing.com/parts/mog-353/overview/
Last edited by 63mako; Mar 30, 2015 at 12:29 AM.
Race Director
Joined: Aug 1999
Posts: 18,126
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From: WI
The 1330 rear flange is 1968-1969 Auto and 1970-1979 all. the 1310 flange was used 1963-1967 and 1968-1969 4 speed. You can't change the flange out because the pinion shaft is different diameter and spline. The conversion Ujoint is the answer. I use the non greasable ones. Way stronger and you can't access it to grease it once installed in a vet.
It will work fine. Had one on my 63 when I got it.
It will work fine. Had one on my 63 when I got it.
incorrect, you can interchange 65-69 yokes with 70-79 yokes
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From: Millington Illinois
St. Jude Donor '08-'09
Thread Starter
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From: Eustis ( Area 51 Bat Cave ) Fl
Mako, many thanks, I would take you up on that but lets be sure I can use it before going to the trouble,
My diff yoke I now have is the narrow I need the wide is that what you have you could set me up with?
The diff diagram I pulled up appears that the yoke is a bolt in item easy to swap?
Gale Banks posted something about you cant just swap out yokes due to it could change the set up of the pattern of the Ring and Pinion, which I am no way savvy on, but redvetracr says you can swap them, you said didn't work for you...I'm all confused.
My diff yoke I now have is the narrow I need the wide is that what you have you could set me up with?
The diff diagram I pulled up appears that the yoke is a bolt in item easy to swap?
Gale Banks posted something about you cant just swap out yokes due to it could change the set up of the pattern of the Ring and Pinion, which I am no way savvy on, but redvetracr says you can swap them, you said didn't work for you...I'm all confused.
Le Mans Master
Joined: Aug 2005
Posts: 6,541
Likes: 1,975
From: Temple Terrace Florida
Joints
I had this problem with my Chevelle. I got the joint at Fleet Pride in Tampa. They have them in stock and changed it out for me in a few minutes. I see you are in Orlando. Worst case, take a drive over here with you parts and they will fix you right up. Jerry
Thread Starter
Race Director
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From: Eustis ( Area 51 Bat Cave ) Fl
I am just trying to be sure I do it right this time...
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From: New Or-leens Loo-z-anna
Race Director
Joined: May 2005
Posts: 10,674
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From: Millington Illinois
St. Jude Donor '08-'09
Mako, many thanks, I would take you up on that but lets be sure I can use it before going to the trouble,
My diff yoke I now have is the narrow I need the wide is that what you have you could set me up with?
The diff diagram I pulled up appears that the yoke is a bolt in item easy to swap?
Gale Banks posted something about you cant just swap out yokes due to it could change the set up of the pattern of the Ring and Pinion, which I am no way savvy on, but redvetracr says you can swap them, you said didn't work for you...I'm all confused.
My diff yoke I now have is the narrow I need the wide is that what you have you could set me up with?
The diff diagram I pulled up appears that the yoke is a bolt in item easy to swap?
Gale Banks posted something about you cant just swap out yokes due to it could change the set up of the pattern of the Ring and Pinion, which I am no way savvy on, but redvetracr says you can swap them, you said didn't work for you...I'm all confused.
Edit: As I said I think the pinion splines and shaft is different but I could be wrong. It looks like 63-79 is the same here. http://www.ecklerscorvette.com/1968+...erentials.html
Last edited by 63mako; Mar 30, 2015 at 07:27 PM.