Driveshaft phasing - Puma 90

[Toxic_Avenger]

Just checking the the defender 90 driveshaft/propshaft phasing.

I removed my drive shaft to clean an oily handbrake drum, and popped the rubber boot to check the grease on the splined shaft. Also gave it a bit of a degrease after a few cycles of grease have been flung around over the kilometers. Foolishly, I didn't mark it before I removed the short splined shaft from the driveshaft proper.

Service manual suggests short splined shaft is required to be 'out of phase' by approx 60 degrees (guessing 60 degrees, as there are 6 rows of ball bearings for the 6 splines on this shaft):

https://i.imgur.com/pznMmPMh.png

Just checking that given that the overall shaft (large part) is balanced from factory, if it's possible to be out of balance by 180 degrees on the short section at the phasing per FSM recommendations?
In less technical terms, if I make it look like the picture, do I have to worry which one of the 2 possible options I have to make it so?

[BreakingBad]

bumping an old thread.

I'm curious what happens if you drive with a prop shaft that is out of phase? - Whether it is equally aligned at each end or offset 180 degrees rather than the 'recommended' 60 degrees? Another question, if it is offset by 60 degrees does it matter if the offset is positive 60 or negative 60 degrees (ie: 60 degrees versus 300 degrees)

[Toxic_Avenger]

I can't answer that as the noise / problem I was chasing was in the rear diff, which ultimately resulted in a cracked planet gear, snapped cross pin, and a busted centre in the rear, and approx 8 stripped teeth on the front ring gear-n all at the same time.

I spoke with a local driveshaft place, and they were not able to give much info without taking it in for a look, but I suspect that it would either be a harmonic type rattle locked to engine RPM, ranging down to almost unnoticeable.

[goingbush]

Rear propshaft needs to be in phase because the TC output shaft and Diff pinion are on horizontal planes , Front propshaft is out of phase because the front diff pinion points uphill toward TC (presumably to give the track rod some ground clearance ).

this will give you some understanding


https://youtu.be/Idk3BVDVHq4

[BreakingBad]

Rear propshaft needs to be in phase because the TC output shaft and Diff pinion are on horizontal planes , Front propshaft is out of phase because the front diff pinion points uphill toward TC (presumably to give the track rod some ground clearance ).

this will give you some understanding


https://youtu.be/Idk3BVDVHq4


I imagine the driveline vibration would be quite noticeable but is it only driveline vibration? Does that damage only the propshaft or does it flow through to the TC and/or diffs aswell? If so, which components are most susceptible to damage? How quickly would it cause damage?