U-bolt style vs. strap style (driveshaft to yoke u-joint) - JeepForum.com

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post #1 of 28 Old 05-22-2010, 05:59 PM Thread Starter
I8AHUMR
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U-bolt style vs. strap style (driveshaft to yoke u-joint)

Wondering what people's thoughts are on u-bolts vs. straps for a 1310 series driveshaft u-joint being mating to the yoke? Is there any advantage to going with the u-bolts? Also, if the u-bolts are worth it, is it simply a case of drilling out the yoke bolt holes for installation?


93 YJ, 4.0, 4.5" suspension, 33x13.5 Pitbull Rockers, Custom scratch and dent job...

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post #2 of 28 Old 05-22-2010, 08:34 PM
Yjeep93
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i went to u-bolts. my opinion is that they are a far better idea then the straps. when you snap a ujoint or break a strap the bolt holding the strap in the yoke is snapped off inside. if your lucky you can get some pliers on it to unthread it but usually you have to get an easy out in there. if you snap a ujoint with the ubolts all you have to do is throw in a new ubolt or just straighten one. the ones that i used are from a ford...??? i got mine from shucks and the part number is 81008. and yes all you have to do is drill out your yoke. it is very hard to drill it while it is still in the jeep though. i would recommend using a drill press. just make sure you get your pinion nut tight when you go to put it back together. your supposed to use a new nut when you remove the old but eh.. =) hope this helps!
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post #3 of 28 Old 05-23-2010, 12:55 AM
fratis
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Quote:
Originally Posted by I8AHUMR View Post
Wondering what people's thoughts are on u-bolts vs. straps for a 1310 series driveshaft u-joint being mating to the yoke?
ultimately i like the ubolt style but there are some issues to watch out for:

Quote:
Originally Posted by I8AHUMR View Post
Is there any advantage to going with the u-bolts?
the only real advantage is the one stated in the first response. ill explain...

Quote:
Originally Posted by I8AHUMR View Post
Also, if the u-bolts are worth it, is it simply a case of drilling out the yoke bolt holes for installation?
no. you can do this, and many have, but it will leave very little yoke "meat" around the ubolt. you can get a yoke made for ubolts for $50.00.

i state that the only advantage was the one previously stated because far too many people convert to ubolts to eliminate the straps stretching and ultimately throwing ujoints. this is simply a band-aid. if you are stretching straps you will ultimatley stretch ubolts. i have gone through this personally. whatever your driveline woes are, they need to be fixed first. for me it was a bad pinion angle after tweaking springs.

the advantage of the straps is, no matter what torque you place on the bolts the pressure on the ujoint caps is somewhat consistent. with the ubolts you have to be very carefull how tight you get them. it is quite easy to overtighten and deform the cap. this will eventually cause the needle bearings to disintegrate.
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post #4 of 28 Old 05-23-2010, 09:05 AM
boggerjeep
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i went to ubolts after my straps kept failing.had to buy a new yoke. i would tighten the straps and the u joint was still loose.

sell your home. buy a Jeep and a shop. cost about the same to have.
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post #5 of 28 Old 05-23-2010, 09:57 AM
RockWoRM
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I had thoughts about doing this, once upon a time. But instead, I took a more, shall we say, reliable route. I dumped the D35 for the 8.8 and got the flange yoke instead.


However, I still have the straps up front, but I'm not that concerned about it and I carry spares in my ditty bag anyway.



WRM

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post #6 of 28 Old 05-23-2010, 10:00 AM
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Quote:
Originally Posted by RockWoRM View Post
I had thoughts about doing this, once upon a time. But instead, I took a more, shall we say, reliable route. I dumped the D35 for the 8.8 and got the flange yoke instead.


However, I still have the straps up front, but I'm not that concerned about it and I carry spares in my ditty bag anyway.



WRM
Agree. The 8.8 uses a flange. Much better.

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post #7 of 28 Old 05-23-2010, 10:13 AM
Thaddeus-J
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Anyone have any experience with a conversion kit? I gotta change a pinion seal cuz it's leaking and will replace all the u-joints while I'm at it. I searched for a yoke conversion kit and this one popped up.

Heavy Duty U Bolt Yoke Conversion Kit

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post #8 of 28 Old 05-23-2010, 10:20 AM
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Quote:
Originally Posted by Thaddeus-J View Post
Anyone have any experience with a conversion kit? I gotta change a pinion seal cuz it's leaking and will replace all the u-joints while I'm at it. I searched for a yoke conversion kit and this one popped up.

Heavy Duty U Bolt Yoke Conversion Kit
Looks like a pretty good kit.

BTW: IIRC they have free shipping this weekend. Or, at least 4WD.com does.

You may want to look there as well.

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post #9 of 28 Old 05-23-2010, 10:21 AM
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Quote:
Originally Posted by Thaddeus-J View Post
Anyone have any experience with a conversion kit? I gotta change a pinion seal cuz it's leaking and will replace all the u-joints while I'm at it. I searched for a yoke conversion kit and this one popped up.

Heavy Duty U Bolt Yoke Conversion Kit
If you have the D44 axle that seems like a slick deal there.

If you have the D35 axle I would opt for the 8.8 axle. I paid at the JY $177 (disc brakes, 4:10, and lsd) sold the D35 for $100! Not much more than the kit you posted.

Looks like they also make it for the D30. I might think about that. Thanks!

'97 Cherokee, 99+ intake, 62mm TB, 703 injectors (new), k&n intake, Hypertech III, 180* stat (1/8" drilled hole), 2.5" manifold 2 tail pipe (Hooker Maxflow & hi flow cat), Perf header, 4.5" zone lift, 32" GY Dura Trac, Rear head rests. Comp cam "231" & Perf head (LS1 BIG valves 2.02/1.62). 3 row alum radiator.
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post #10 of 28 Old 01-07-2011, 09:35 PM
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post #11 of 28 Old 01-08-2011, 07:42 AM
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I installed the u-bolt on my '91 YJ as I had to keep changing the u-joint. I have not had any problems since. My old yoke had spread some and the u-joint was moving in the yoke even when the straps where tight.

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post #12 of 28 Old 01-08-2011, 08:00 AM
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Originally Posted by larry408 View Post
... My old yoke had spread some and the u-joint was moving in the yoke even when the straps where tight.
That should tell you something was wrong. damaged strap, wrong strap, damaged yoke.. something. Failure was inevitable.
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post #13 of 28 Old 01-08-2011, 10:45 AM
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I never had an issue running the straps. The u bolts on the 9" were just another bonus but I still run straps on the front and have never broken one.

Your limited slip differential sucks.

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post #14 of 28 Old 01-08-2011, 02:00 PM
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If you go to u-bolts and replace the yoke try looking at you local driveshaft builder or supplier they might have whay you want for a lot less than the 4 wheel drive shops. Remember when they say that they are a 4x4 shop or supplier they markup stuff too high for what others will sell the same thing for.

A 89 yj with a 4.0 aw4 sye out of an 92xj. Now the hard part is done time to get it up in the air just a bit. Working on 8.8 with 3.73 and lsd for the rear. and new D30 hp with 3.73 .
For those who have not figured this out I'm old school but can handle the new too.
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post #15 of 28 Old 01-08-2011, 03:18 PM
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THese are nice

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My 2.5 to 4.3 swap thread

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