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OT- quick question about a driveshaft

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Old May 25, 2011 | 10:09 AM
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OT- quick question about a driveshaft

Off Topic, sorry, but I need some help. I have been doing a complete upgrade on my jeep. Getting rid of the stupid Peugeot transmission and replacing it with a Asian AX15. I completely tore down the tranny, replaced worn parts, new synchros, new bearings, new seals. I had to also tear down the transfer case and replace the input planetary gear to match the output shaft on the tranny. Everything from there has had to be modified. Shorter rear drive shaft, new tranny mount and placement, new transfer case linkage, new clutch hydraulics and other stuff. I have completely documented everything in a jeep forum, which I won't mention. I mean, this is a pretty major project for me. Over 300 views on my thread and not one, not one response. I have one simple question and you think someone over there would answer my stupid little question. But noooooooo, I have to come over here where I know the real experts are. So here is my question. I'm ready to put the rear drive shaft back in and start this thing up to see if I'm going to be cracking a cold one and celebrating my first tranny rebuild or I'm going to be crying about all the time I have put in to a failure. The drive shaft has some type of alignment spline where there is a gap in the splines that slip over the output shaft of the transfer case. I don't see any differences in the splines of the transfer case output shaft, what am I looking for here in order to line these things up. Of course I could not mark anything at removal because everything is new. Thanks for the help guys. Here is a link to the write up if anyone is interested. There are pictures..

BA 10 to AX 15 on the cheap - JeepsUnlimited.com Forums
 
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Old May 25, 2011 | 10:41 AM
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So if I understand correctly you are saying that there are alignment grooves in the yoke, but not on the output shaft? If that's the case, I don't think it makes any difference where you slip it together. I have never heard of needing to "clock" the entire drive shaft. Some drive shafts don't have the clocking splines and you have to be sure that the U-joints are clocked appropriately in relation to each other, but I am not aware of anything that would require that the entire drive shaft assembly be clocked a certain way in relation to the tranny.

Someone correct me if I am wrong....
 
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Old May 25, 2011 | 11:07 AM
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I just know that when I pulled the drive shaft down from my truck and lubed the splines I had to make sure it went back in the same way because the splines had to line up. I didn't know if it was the same on the jeep. Yeah, on the inside of the female end of the drive shaft, do you call that the slip yoke? There is one blank space, I was thinking it had to line up with something on the TC shaft, but I don't see anything that would indicate a definite position.
 
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Old May 25, 2011 | 11:49 AM
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On your truck it needed to go back the same way for balance issues. Sorry I am no help on the Jeep.
 
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Old May 25, 2011 | 11:56 AM
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I guess I always though that the drive shaft was balanced by itself as an assembly as was the tranny, so as long as they were balanced individually, you were alright to assemble them how ever they would go together.
 
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Old May 25, 2011 | 12:16 PM
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in a single shaft design that may be true, but when you have two shafts together and a carrier bearing the u-joints of both shafts have to be in phase. I don't really think its going to matter on the jeep as far as balance, the jeep shaft is only about 20" long, but the shaft does have to be able to slide freely on the transfer case splines to compensate for axle variations. That is why I want to make sure I put it back together right.
 
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Old May 25, 2011 | 12:25 PM
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Originally Posted by rad1026
in a single shaft design that may be true, but when you have two shafts together and a carrier bearing the u-joints of both shafts have to be in phase. I don't really think its going to matter on the jeep as far as balance, the jeep shaft is only about 20" long, but the shaft does have to be able to slide freely on the transfer case splines to compensate for axle variations. That is why I want to make sure I put it back together right.
Right I understand that with a split shaft and carrier bearing that the shafts have to be "clocked" correctly because of the fact that you have two separate sets of u-joints and you don't want them to be binding and working against each other, but in a single drive shaft drive line, I don't see why it makes any difference. Like you said as long as the slip yoke will move freely, I don't think it would make any difference.

Come to think of it, we replaced the rear end in my Dad's Grand Cherokee(one piece drive shaft) , and I don't think it had any indexing notches or anything where it slipped onto the transfer case.

I'm pretty sure you should be able to just put it together and take it out for a drive. Just be sure to do so BEFORE the celebratory drinks come out.
 
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Old May 25, 2011 | 01:45 PM
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It wont matter.

You can attach the yoke to to transfer case in any orientation necessary, as long as it slides freely and fits tight.

The probable reason there is an indexing spline on the interior diameter of the yoke is it may be a "universal" part.



On a side note.....300 views and no replies? There are better off road and 4X4 forums out there that are pretty jeep specific.
 
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Old May 25, 2011 | 01:48 PM
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Nice, it goes back in tonight! I'll let you guys know if I'm drinkin or cryin
 
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Old May 25, 2011 | 02:29 PM
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Im bettin on the drin...er, fishing.
 
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Old May 25, 2011 | 03:03 PM
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man, fishing sounds so good. Its been way too long since I have just wet a line and sat in a chair.
 
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Old May 26, 2011 | 10:41 AM
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The jeep is up and running. The transmission shifts nice and smooth in all gears, no grinding, no slipping. I rebuilt a transmission, how cool is that. Hey, and it works.
 
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Old May 26, 2011 | 10:49 AM
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Really cool!!!! The only tranny rebuild Ive done was a toyota 5sp manual and transfer case. Im not quite brave enough to venture into a auto!
 
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Old May 26, 2011 | 11:09 AM
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Glad it went well, we build jeeps also, when in doubt, give Tom Woods a shout in Utah, we use his drive shaft's, there the best.
 
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Old May 26, 2011 | 01:29 PM
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Glad to hear it all worked out!
 
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