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My U-joints on my new drive shaft are going to bind

GsxrMike

GsxrMike

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So I got my driveshaft shortened and I went to put it in tonight and I noticed that my driveshaft will only hang about 3 inches below my pinion yoke before it is in a complete bind. Can I clearance around the joint to give it a little more room to move. What is a good operating angle on a 1350 u-joint?

picture.php
 
Those are 1350's?

Got pics of the joints and ears up closer?
 
most u joints, can operate from 3-5 degrees IIRC, if u have to clearance it, im sure ull go through u joints like its ur job. i have 6" susp. lift on mine and so does my brother, i did my u joints and 2 monthes later i picked up a CV shaft, i took my old shaft off expecting to see good u joints because they didnt feel bad driving and both were dry.so they go bad long before u actually feel them. i packed them real good also.
 
thatK30guy said:
Those are 1350's?

Got pics of the joints and ears up closer?
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The guy at the driveshaft shop told me they were 1350s because I made a point of asking. I don't know much about ujoints so I was trying to learn something new. I can get pics tomorrow of the ears tomorrow with a better camera.
 
I don't mean to hijack this thread but I am curious as to what CV you used Shaun89. I'm running 6inches of lift in my 78K10 and have run into issues with the stock CV binding. If you found a CV that works it will save me a whole lot of time.
 
chev-mc said:
I don't mean to hijack this thread but I am curious as to what CV you used Shaun89. I'm running 6inches of lift in my 78K10 and have run into issues with the stock CV binding. If you found a CV that works it will save me a whole lot of time.
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i actually bought a rear CV shaft from a member on here. its nothing crazy or high angle.i believe its just a CV joint off another vehicle but it was a new one. just talk to kert from DIY4X. he just started making driveshafts and i can tell u, that man does QUALITY work. my brother just ordered a rear CV shaft for his blazer cause he kept going through u joints. o ya. and the price my brother got it for. you wont find anywhere else! if u do end up calling him (which i highly recommend) just be ready with the stock shaft to give him measurements and all the general info about ur truck. www.diy4x.com
 
shauns cv came from the caddy el dorado with a th400 or something like that, same style. also had a full spline slip instead of like 3/4 on a caddy slip. very nice driveshaft.
 
obijuan said:
shauns cv came from the caddy el dorado with a th400 or something like that, same style. also had a full spline slip instead of like 3/4 on a caddy slip. very nice driveshaft.
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haha thanks! even im learning new things about my shaft:doah:
 
Awesome, I had no idea they made drive shafts!
Thanks for all of the info guys :bow:





-Matt
 
can i rotate my pinion past 0*?

Could I rotate my rear axle past 0* and make it look something like this? Or should I just rotate my rear axle until my axle pinion angle will be 3*-5*? Will either one of these ideas work and give me no vibration?
picture.php
 
GsxrMike said:
Could I rotate my rear axle past 0* and make it look something like this? Or should I just rotate my rear axle until my axle pinion angle will be 3*-5*? Will either one of these ideas work and give me no vibration?
picture.php
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I used to run my pinion higher than the t-case like your pic and had no issues with it.

Dik
 
Another Idea I had was to get a 1410 driveshaft so I could run more of an angle safely. I read an article about this on Pirate but didn't know if I could get a slip yoke for my 208 that would exept a 1410 joint.
 
GsxrMike said:
What kind of driving did you do? Any highway? Rocks, Mud? Any vibrations? If I did this what angles would I want?
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I drove my rig to and from the trail and had no vibes when it was like that. I don't do mud and the angle all depends on the specific application. You want it to be within 2-3 degrees of your Tcase so you would need to know that angle first. Then rather than having it at the same angle as your tcase you need it to be the opposite angle, if that makes any sense.

Dik
 
sandawgk5 said:
I drove my rig to and from the trail and had no vibes when it was like that. I don't do mud and the angle all depends on the specific application. You want it to be within 2-3 degrees of your Tcase so you would need to know that angle first. Then rather than having it at the same angle as your tcase you need it to be the opposite angle, if that makes any sense.

Dik
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So...Umm...What? lets just say that I set up my rear driveshaft like I have it in the picture. If the angle at my t'case was lets say 10* then I would want my angle at my rearend to be 12*? I am afraid of a serious vibration during acceleration if I do that but only because the guy at the speed shop told me so. Let me know if this sounds right so I can go down and get to cutting! Thanks!
 
GsxrMike said:
So...Umm...What? lets just say that I set up my rear driveshaft like I have it in the picture. If the angle at my t'case was lets say 10* then I would want my angle at my rearend to be 12*? I am afraid of a serious vibration during acceleration if I do that but only because the guy at the speed shop told me so. Let me know if this sounds right so I can go down and get to cutting! Thanks!
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Nope you would have to go higher than that. If you only went 12* that would be ideal for a CV since the pinion would more or less be pointing at the tcase output.

For the way you are talking if your Tcase is 10 down start by pointing the pinion at the Tcase lets call that zero. Now rotate the pinion up an additional 10* to be equal in angle but the opposite direction of the tcase. It looks wierd but this will put the joints operating at the angle and that is really all the joints care about. Their rotations will cancel each other out and there "should" be no vibes. You can do a search on here for Dozers rig he had a 14FF that was rotated up like that and he never had any issues with it.

Dik
 
One thing you might have to worry about with that kind of setup is the pinion bearings lubrication. I think i'm missing something about the trucks setup since with under 6" of lift it shouldn't be very difficult to setup with either a standard shaft or CV shaft should it?

Edit: This site is helpful: http://www.4xshaft.com/driveline101.html
 
bp71k5 said:
One thing you might have to worry about with that kind of setup is the pinion bearings lubrication. I think i'm missing something about the trucks setup since with under 6" of lift it shouldn't be very difficult to setup with either a standard shaft or CV shaft should it?

Edit: This site is helpful: http://www.4xshaft.com/driveline101.html
Click to expand...

I did this with a 14FF with 4" lift and had no issues with pinion bearings. I currently run a 1350 shaft since I destroyed my s44/1350 conversion shaft. With the old shaft I did have binding issues with the conversion joint that is why I had to rotate my pinion up higher than the tcase. With the larger joint shaft I do not have any binding issues.

Dik
 
So I want to keep my u-joint angles the same if I run my driveshaft like in the pic? I could drill and tap the top of my axle housing so I could "overfill" the diff to help pinion bearing lubercation correct?
 
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