Stomis
Professional Amateur
And you're sure the output doesnt have a blind the yoke doesnt?
CK5
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Help me figure out a SYE/driveshaft setup
- Thread starter dyeager535
- Start date
A blind?
Stomis
Professional Amateur
Like a spot where the spline isnt cut out.
Kind of wondered if thats what you meant. I didn't see any, when I counted the one, did not see anything "off" in that regard, and I did look.
Never heard of anyone having to install a driveshaft that was "keyed", but maybe they have?
Never heard of anyone having to install a driveshaft that was "keyed", but maybe they have?
Stomis
Professional Amateur
No, me neither. Just thought I would ask.
You could always take a small angled file to the yoke and just clean it up to see if its just a slight hand up.
Yoke goes on the front output so smoothly, I can't see it being the problem though. Probably wouldn't hurt to clean everything up, but it goes onto the front so easily, I can't see how it would really help.
That I couldn't fit it on the other output which looks fine (and I removed the driveshaft from that truck, so I know it was "good") keeps me thinking something is different in the shaft itself.
When I get time I'll measure the shaft and see if there is a bit of a difference. It's got to be very close if there is any.
That I couldn't fit it on the other output which looks fine (and I removed the driveshaft from that truck, so I know it was "good") keeps me thinking something is different in the shaft itself.
When I get time I'll measure the shaft and see if there is a bit of a difference. It's got to be very close if there is any.
Stomis
Professional Amateur
One thing to consider is you've got to replace that output shaft regardless with the SYE anyway no?
Yeah, the shaft is going, but that makes me wonder what spline setup they use for the SYE? I had anticipated taking the front flange and having a CV shaft made from what I already have, but until/if JB gets back to me about whether the front output flange will work on their output shaft, not sure if I will need to buy one with yoke or flange, or if I can get away without one.
Stomis
Professional Amateur
Lemme look back at what that case I had was using. I could have sworn it was SYE'd and I had 32 spln factory CV flanges on it front and back...
I'd appreciate it!
Stomis
Professional Amateur
Found it. Here was the specs on the Tcase I had.
It may even be that the 32 spline used on the front isn't the same spec as the 32 spline used on the slip yoke rear. Because the applications were different (ie one moving slip compared to fixed load transfer). The Machinerys Handbook lists 30, 37.5, and 45 degree pressure angles for the 1970 American National Standard involute splines. Then there are the Metric ANSI involute splines from the 1980 spec with even more options.
I would expect the factory fixed yoke rear will be made to a similar standard to the fixed yoke fronts for interchangeability.
I would expect the factory fixed yoke rear will be made to a similar standard to the fixed yoke fronts for interchangeability.
Did your have matching flanges front/rear? I know JB offers a 1350 flange, no idea about Woods.
I took a pretty good look at the splines after hammering it on a bit, then after removing it, and if the splines are off, they aren't by much. Didn't see much for shiny spots, may need to look at it closer.
If/when JB gets back to me, I'll post up what they say.
This makes me think they are the same diameter and spline count with different pressure angles. If you had the tools to measure the angle between spline teeth you could figure it out fast. Even just checking the linear distance across the root of the shaft spline on the front and rear output shafts could tell you a lot using standard calipers.
Next time I've got it out, I'll measure the overall diameter and then check the distance between the root of the splines. more curiosity than anything at this point, but interesting nonetheless.
Stomis
Professional Amateur
I had matching factory front flanges on it front and back.
Ok. I'm optimistic that I'll get the response back that I would like! 
Stomis
Professional Amateur
Ok. I'm optimistic that I'll get the response back that I would like!
It was an Ah Ha! moment I had lol. I was putting the front yoke on it after having it apart and went "wait a second here!"
Diameter of the shaft may be different on the slip yoke shaft. The factory wouldn't want people on the assembly line putting parts on the wrong end
Didn't actually measure the diameter of the shaft, but the distance between splines at the base diameter of the 241C (passenger drop) rear and front output shafts are .035" and .018" respectively.
I tried a driveshaft on the front output shaft that fit the rear fine, no way it would go on.
The front output shaft is not "keyed" BTW.
Worthless info I'm sure, but just in case someone ever needs that info lol.
I have been told that at least the 208 front output flange works with JB's SYE, however I do not know if the 208 and 241 flanges are the same piece. Guess I could look in the parts manual eh?
Edit: The NP241 front flange does indeed fit the splines of the JB Conversions SYE shaft. Received the kit and checked.
Edit Edit: Had a local driveline shop cut the NP241 yoke down. You cannot use it as-is with the JB setup, the JB output isn't long enough, the nut won't get started.
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