 | Home > Puma (Tdci) > Developing transmission rumble and vibration |
 
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| Rickydodah Member Since: 14 Jul 2014 Location: East Sussex Posts: 1091  |
From looking at the picture the UJ's are in phase with one another which on the Puma is not correct AFAIR. I'd be inclined to remove the sliding joint end and move it one spline out of phase and try it. I can't remember if the front UJ leads or trails the rear so you could try turning it one spline in the opposite direction if it is no better. The stock shaft has a raised dimple on the yoke of the sliding end which lines up with a mark under the rubber boot.
 I started with nothing and still have most of it left! |
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19th Nov 2016 7:46pm |
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| redline Member Since: 28 Jun 2015 Location: Mountains and Lakes Posts: 221 
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Okan, that's a positive result - at least you isolated the problem! Did you assemble the shaft yourself (ie slide the two halves together) or did it come like that from Terrafirma?
I would do as Rickydodah suggests, as I've heard from others that even altering the phase by one spline can have an effect on "cancelling" the cyclic acceleration / deceleration that causes the vibration. That said, from the photo, your shaft phasing looks exactly like mine (the yokes are aligned) ... and I have no vibration |
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19th Nov 2016 8:10pm |
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| redline Member Since: 28 Jun 2015 Location: Mountains and Lakes Posts: 221
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Okan,
Whilst the driveshaft is off, can you measure the angles of the TC output flange and the Differential input flange? Also measure the distance between the two flanges centre-line to centre-line. Finally the horizontal distance between the two flanges OR the driveshft angle when installed. That will give us all the info to understand the problem exactly. |
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19th Nov 2016 8:46pm |
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| Okan Member Since: 17 Oct 2016 Location: Geneva Posts: 138 
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Hi!
The first time I received it from terrafirma it was aligned. But I tried two sides. First side is like on the picture and second side is 180 degree at the opposite side. The two options didn't supress the vibration. I'm a bit disapointed with it. I m pretty sure that this propshaft is not balanced like the stock land rover propshaft. The yokes should be aligned but maybe the propshaft itself wasn't correctly balanced. What do.you think? |
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19th Nov 2016 8:53pm |
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| redline Member Since: 28 Jun 2015 Location: Mountains and Lakes Posts: 221
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Just checked and for a stock 110 the rear driveshaft should be in-phase. As yours is lifted you will probably need to be 1 or 2 splines out of phase, but not sure if leading or lagging...
 Click image to enlarge |
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19th Nov 2016 9:03pm |
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| redline Member Since: 28 Jun 2015 Location: Mountains and Lakes Posts: 221
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Okan, the driveshaft will normally be sold in-phase and dynamically balanced in that position.
I am quite sure that because your vehicle is lifted, the angles are slightly out, causing the vibration. This is also consistent with the issue being worse when going up-hill as the rear diff will rotate slightly due to weight transfer. Changing the phase will *compensate* for the vibration slightly. In summary I doubt its a driveshaft preblem per-se, rather that it needs to be set-up specifically for your vehicle. NOTE that if you do change the phasing, it will likely affect the balance. It may not be perceptible, but to be precise, once you've determined the ideal phasing, then you should get it dynamically balanced. |
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19th Nov 2016 9:24pm |
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| Okan Member Since: 17 Oct 2016 Location: Geneva Posts: 138
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I m not sure to understand because my front terrafirma double card has aligned yokes and it works without any vibrations when I remove the rear propshaft. What does it means? Should I put the rear out of phase to find a good driveline without any vibrations?
Regards |
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19th Nov 2016 9:26pm |
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| redline Member Since: 28 Jun 2015 Location: Mountains and Lakes Posts: 221
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Okan - the short answer is that a DC will always be in phase. A normal drive shaft will always be in phase if angles are the same front and rear. The ONLY reason for being out of phase is if the angles are not equal (possible on the rear of a lifted vehicle).
So I would at least check the flange angles. If they are not co-planar then changing the phasing will most likely help reduce the vibration, but you will have to experiment (for 16 spline slip joint, 1 spline = 22.5 degrees) so either 1 or 2 splines I think. |
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19th Nov 2016 9:44pm |
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| Rickydodah Member Since: 14 Jul 2014 Location: East Sussex Posts: 1091 |
Just had a quick look under mine which is at stock height and it is definitely out of phase by about 20 deg.
 I started with nothing and still have most of it left! |
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19th Nov 2016 9:58pm |
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| redline Member Since: 28 Jun 2015 Location: Mountains and Lakes Posts: 221
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Rickydodah: That's the rear driveshaft right? Can you tell if the rear UJ is leading or lagging with respect to the front? I will have a closer look at mine tomorrow morning, but am fairly sure that its in-phase. Weird...!
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19th Nov 2016 10:05pm |
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| Rickydodah Member Since: 14 Jul 2014 Location: East Sussex Posts: 1091 |
Definitely the rear, I'll have a look in the morning as we're in the middle of storm Angus at the moment
 I started with nothing and still have most of it left! |
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19th Nov 2016 10:43pm |
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| Okan Member Since: 17 Oct 2016 Location: Geneva Posts: 138
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I will try it tomorrow but how to know in which direction to remove the yokes to going out of phase? Right or left? And from which departure point? Best regards |
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20th Nov 2016 12:02am |
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| redline Member Since: 28 Jun 2015 Location: Mountains and Lakes Posts: 221
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First thing: mark the in-phase as it is now! That is your reference point that you can always go back to in-phase at which the shaft was balanced.
Regarding the direction: I don't know, and honestly I don't know if it makes a difference. If Rickydodah posts how his is set-up (clockwise or anticlockwise) then I would try that... Otherwise you have to pick a direction and try it. If it doesn't work, then try the other direction. As a short cut, as your rear lift is quite large, I would maybe start directly +/- 2 splines. Goodluck!!! |
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20th Nov 2016 12:12am |
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| Okan Member Since: 17 Oct 2016 Location: Geneva Posts: 138
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Hi!
The problem is that the first time I disaseembled the shaft I didn't have any experience with it and I didn't mark the in phase position like it was first.
So I'm pretty sure it was in phase but it makes allready 4 possibility. Because if you see well, when the yokes are in phase so aligned they are in fact one spline left or one splin right. It' not realy in the middle. So the "phase" initial side was maybe one spline left or one splin right or maybe the same at 180 degrees. In fact I'm afraid that the only solution is to try every splin now...That's horrible 
best regards |
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20th Nov 2016 9:56am |
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