Tail shaft Vibration
Posted: Sun Jul 08, 2018 8:53 pm
I found this short video interesting. I'm looking into it further as I'm over it and every change is not a proper fix.
Yes, it is not a 2 piece shaft and no I do not have speakers on the PC but from what I saw it's not just a matter of getting out pinions angle correct but a phasing should also be taken into account.
If both are done and not just one then all vibrations should be gone.
The centre bearing drop kits are bullshit in my opinion and do not resolve the issue entirely. It's a cheap fix that help to make it better and not eliminate it.
As far as I'm concerned the first part of the shaft should be parallel with the output shaft of the gear box so a centre bearing spacer messes with this straight away and changing the phase with a re balance would probably end in tears as it was not balanced that way in the first place.
I have seen other people use a double cardan joint but is this a be all end all fix? I'm unsure and it may be a better solution when the center bearing is lower than the output shaft.
So tomorrow I will measure my pinion and tail shaft angles again as I have already installed 2 degree caster wedges then go and have a chat with a tail shaft specialist.
I believe if the centre bearing is left parallel with the output shaft and the correct cater wedges and phasing is done then it should resolve the issue completely.
Found a cool calculator also. https://spicerparts.com/calculators/dri ... calculatorClick show diagrams.
https://www.youtube.com/watch?v=Idk3BVDVHq4
Yes, it is not a 2 piece shaft and no I do not have speakers on the PC but from what I saw it's not just a matter of getting out pinions angle correct but a phasing should also be taken into account.
If both are done and not just one then all vibrations should be gone.
The centre bearing drop kits are bullshit in my opinion and do not resolve the issue entirely. It's a cheap fix that help to make it better and not eliminate it.
As far as I'm concerned the first part of the shaft should be parallel with the output shaft of the gear box so a centre bearing spacer messes with this straight away and changing the phase with a re balance would probably end in tears as it was not balanced that way in the first place.
I have seen other people use a double cardan joint but is this a be all end all fix? I'm unsure and it may be a better solution when the center bearing is lower than the output shaft.
So tomorrow I will measure my pinion and tail shaft angles again as I have already installed 2 degree caster wedges then go and have a chat with a tail shaft specialist.
I believe if the centre bearing is left parallel with the output shaft and the correct cater wedges and phasing is done then it should resolve the issue completely.
Found a cool calculator also. https://spicerparts.com/calculators/dri ... calculatorClick show diagrams.
https://www.youtube.com/watch?v=Idk3BVDVHq4