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08-12-2005, 10:10 AM
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CC Member
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Join Date: Mar 2004
Cobra Make, Engine:
Posts: 37
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Dave - New yoke doesn't match....
Dave,
Tried calling a few times but you're on ansaphone, and you don't seem to be a fan of email so......
You sent me a new 28 spline output shaft and yoke to replace my snapped 25 spline but there's a problem with the yoke.
The picture explains best - the jaw opening is about 10mm different. I did explain that I was replacing a 25 spline and you didn't mention this may be a problem - the old one appears stock - does this require the prop shaft rewelding and if so....why didn't you say anything?!
What's the way forward here?
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08-12-2005, 11:00 AM
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
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Looks like it's just a matter of u-joint sizes.....Is that 1330 slip yoke? Maybe your old one is a 1310. Are the u-joint bore diameters the same?
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08-12-2005, 11:41 AM
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Join Date: Oct 1999
Location: San Antonio, Texas, US,
Posts: 140
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U-joint
The yoke we sent should be a 1310, it should measure 3 3/16" between the snap ring grooves. This yoke has the smallest u-joint size available because it was the most common.
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08-12-2005, 12:06 PM
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Join Date: Mar 2001
Location: Cinnaminson,
NJ
Cobra Make, Engine: Cobra Fibercraft Bodies 427 S/C, 351W disguised as a 427.
Posts: 391
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There are two different common yoke sizes for the Ford, the 1310 which is 3 1/4" wide and accepts U-joint caps with a 1 1/16" outer diameter and the 1330 which measures 3 5/8" wide and a cap diameter of 1 1/8 inch. Both slip yokes are commonly available and are usually interchangeable in the transmission since they usually have the same spline count and outer shaft diameter. There is also a 1350 yoke which is almost never found in production car driveshafts. The 1350 series has a cap diameter of 1 3/16 inch and the body and journals are bigger than the 1310 or 1330. There is an adapter U-joint available at most parts stores that is size 1310 on one side and 1330 on the other side. I have to use the conversion U-joint on my Cobra because the driveshaft yokes are 1310 and the pinion yoke on the rear end is 1330. Everything worked out well. SO, in summary, you have two possible solutions. You can either obtain an adapter U-joint or find a 28 spline 1310 slip yoke. Either solution should work out just fine.
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Political correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."
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08-12-2005, 04:57 PM
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Re: U-joint
Quote:
Originally posted by David Kee
The yoke we sent should be a 1310, it should measure 3 3/16" between the snap ring grooves. This yoke has the smallest u-joint size available because it was the most common.
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Yes it is - but how does this help? I need to move forward here.
The original yoke measures 2 7/8" between the snap rings - as the expert here, is that stock for a 25 spline shaft? To be honest, if you can answer that, then I would have expected you to point it out when I ordered.
Is there a solution other than welding a replacement matching UJ on the prop shaft? |
08-13-2005, 06:30 AM
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Location: San Antonio, Texas, US,
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I wanted you to check the new yoke to make sure you had the correct part. I have never had a problem with a 28 x 1310 yoke replacing a 25 spline yoke so this is new to me. The only u-joint size I knew about on a 25 spline yoke is 1310 until now.
If I thought this would not be a direct swap I would of explained any problems in great detail. You called me with a problem and I sent you everything I thought you would need to fix it. The only correct fix for your broken 25 spline mainshaft is a replacement 28 spline mainshaft. The 25 spline mainshafts are defective and should not be used, ever. If you had found another 25 spline mainshaft you would be doing this again.
There are two solutions:
1. Use a conversion u-joint
2. Change the front of the drive shaft to 1310
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08-14-2005, 02:21 PM
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Thankyou Dave - that's the kind of response I was looking for with my initial post.
I hope I can ask one more question? Do you (or does anyone) know off the existence/source of conversion U-joints from 2 7/8" to 3 3/16"?
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08-14-2005, 06:56 PM
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Senior Club Cobra Member
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Join Date: Sep 2000
Location: Holderness, NH, US of A,
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Cobra Make, Engine: CSX 4772 old iron FE
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There's quite a few.........
neapco
Here is one. If you do a quick search on conversion universal joints 1330 and 1310 there are all kinds of options. It's a fairly common part I believe.
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08-14-2005, 07:07 PM
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Location: San Antonio, Texas, US,
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I will try to find one tomorrow, can you give me the cap diameter of your old yoke?
mickmate, This is 1310 to smaller than 1310. Not 1310 to 1330.
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08-15-2005, 09:15 AM
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Join Date: Dec 2003
Location: Gurnee,
IL
Cobra Make, Engine: Kirkham #259
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With a Drive shaft spinning next to your body......
Why wouldn't you go to the largest u-joint you can use?????
If you ever saw a driveshaft break ...... you'd have the 1350's on both ends of the drive shaft....
And don't get the u-joints with the zerk fitting in them.... they are weak.... at that point....
Morris
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08-15-2005, 11:43 AM
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David - dia of cap is same as new yoke, I measured 1.06" - many thanks.
Morris - I may well have to go to 1310 on the prop, but strangely there is more meat on the old, smaller UJ - from 1 to almost 2mm max around the cap circumference.
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08-15-2005, 01:12 PM
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Smash
Spicer 1310 series u-joint is only made to handle 300-350 Hp.....
Spicer 1330 series u-joint will only handle approx 400-450 Hp.....
Spicer 1350 series u-joint will handle torque up to 600 ft lbs or more....
It's your safety....and don't think for one minute that a 1310 u-joint is stronger then a 1350......
Morris
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Morris
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08-15-2005, 01:49 PM
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Smash,
We are out of luck the other u-joint listed smaller than a 1310 is referred to as a 1 3/4R. The dimensions are 2.438" from cap to cap and 1.062 cap diameter. There is no conversion u-joint for that size to 1310. It looks like you will have to change the end of the driveshaft.
Morris,
I agree with you on the sizes and bigger is better but I have seen a 1300hp+ turbo drag car that weighed #2900 run solid 1330's for two seasons with no failures.
I have solid 1350's in my car with 1000hp at #2975 I was not willing to take chances.
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08-15-2005, 02:37 PM
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David,
What transmission are you running in that thing?
TURK 
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OBAMA IN in 2012
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08-15-2005, 02:55 PM
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Join Date: Dec 2001
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John Deere hydrostatic with PTO.....hehehe
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08-15-2005, 04:48 PM
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Location: San Antonio, Texas, US,
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It has a used small spline toploader in it. 
Unfortunately we are forced to run automatics in True 10.5 so we are using a C4 right now. I have someone else fill it and service it because ATF stinks and I'm afraid I would have an allergic reaction if it touches me.
If they allowed clutches and manual gearboxes we would run a Jerico 5 speed.
Last edited by David Kee; 08-15-2005 at 04:50 PM..
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08-15-2005, 04:51 PM
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That's how I feel about small block Chevy's...I try to stay away from them....
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08-16-2005, 12:19 AM
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David - thanks for trying.
OK, I'm buying into this scare mongery thing - I wasn't keen on the look of the 1310 when it showed up and I'm even less keen on it now I know it's rating. Where do you find the power ratings?
My old yoke obviously isn't stock - the rear end on my cobra is jaguar, hence the prop shaft is shortened jag and as the "collar and cuffs match", eg the yoke on the diff end and gearbox end, I can only assume the old toploader yoke has been customed to standard jag yoke.
I have no idea on the power handling of jag UJ's but I'm currently considering having the 1310 removed and going jag yoke rather than removing the prop yoke - assuming that's possible...
Last edited by smash; 08-16-2005 at 12:29 AM..
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