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Old 02-10-2014, 06:23 PM
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WJ 4.7l Front U-Joint Driveshaft Conversion

Hi, I'm looking into doing the Cv Joint to U-joint driveshaft conversion. I've found all my parts needed but cant find a yoke for my transfer case(NV247). Also I have the cv to cv driveshaft(repezza to repezza).I've been searching for hours and found a few but they weren't very informative if it would work for my trans case. So any help or a point in the right direction would be awesome thanks.
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Old 02-13-2014, 12:13 AM
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Re: WJ 4.7l Front U-Joint Driveshaft Conversion

You should be fine. The 26 spline front t case yokes are all interchangeable on a WJ. I have read that on rare occasions you might run into a 32 spline front output shaft but I've never seen one. The 242HD I bought to replace my 247 has the 26 spline output so the V8 case is the same too. To make sure when you pull the shaft see if the pinion yoke will fit on the t case shaft. Wj front diffs are all 26 spline no matter what. Also if you're gonna tackle this yourself get hold of a service manual because the front diff yoke is not a simple take off and slam on deal. There is a pretty intricate bearing preload procedure you have to follow and it starts even before you take the old one off. You also are going to need an inch # torque wrench and a foot# wrench capable of reading well over 220 foot # If you don't get it right you won't be going very far. If you can't find it let me know and I'll see if I can't dig up the procedure for ya.
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Old 02-13-2014, 09:13 AM
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Alright thanks for the info and for the reply. Ya, I got haynes service manual plus thousand hours of searching online. Only other thing that stumps me is if I need a crush sleeve and how to install. Thanks again
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Old 02-13-2014, 02:18 PM
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Re: WJ 4.7l Front U-Joint Driveshaft Conversion

The attached pdf's are from the FSM. Now Jeep and most pros will tell you it must be done this way but to be honest most people don't change the sleeve if they can get the numbers they're looking for. Now this is where checking the preload with the inch# wrench before removing the yoke comes in. If your diff was quiet before you started and in good shape it doesn't really matter what the number is just remember it. When reassembling most people add 5 inch# to that number to account for wear with very good results. If you cant get that number or over tighten then you have to use a new sleeve and start over. also I would highly recommend a new nut for the pinion shaft. I used an old nut on a Dodge Power Wagon many,many years ago and it backed off going down the road with catastrophic results I haven't touched a diff since.
Attached Files
File Type: pdf Collapsible Spacer.pdf (255.7 KB, 9 views)
File Type: pdf Preload Procedure.pdf (219.4 KB, 7 views)
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OK, fine...I'll admit...some amber lamps are good, and necessary.
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Old 02-24-2014, 08:38 PM
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Re: WJ 4.7l Front U-Joint Driveshaft Conversion

Ok, I'm going to jump in here. I'd also like to go to a double cardon, esp. with a 2" lift and towing, but have no clue where to start.

Do they make kits? Any suggestions on where to begin?
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Old 02-28-2014, 01:47 AM
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Re: WJ 4.7l Front U-Joint Driveshaft Conversion

Well first things first,tker. Which shaft do you have lurking under there? 1,2 or 4? 3 is what you're wanting to upgrade to.

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Old 02-28-2014, 10:16 AM
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Re: WJ 4.7l Front U-Joint Driveshaft Conversion

It's either 1 or 2. I believe its #1 but will double check after work.
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Old 03-01-2014, 05:51 PM
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Re: WJ 4.7l Front U-Joint Driveshaft Conversion

Well all it really matters is how many extra yokes you have to buy. If you have u joints on one side you don't have to change that yoke. Here's one with everything no matter what. I just did a quick search so I'm sure with a little research you could find a better deal.

IRON ROCK OFF ROAD: Front Driveshaft Conversion Kit
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OK, fine...I'll admit...some amber lamps are good, and necessary.
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Old 03-24-2014, 12:12 AM
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As much as I like iro, you should be using a real driveline shop Carolina driveline is cheaper and better imho always get spicer joints
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