I have a 1 piece steel tailshaft in the Z - and apart from balancing problems with the manufacturer - it also has a very weird resonance - especially under load... almost sounds like a very loud exhaust drone/drumming sound. Anyone experienced this - and any ideas as to whats causing it before I go and get my 1 piece cut in half and turned back into a 2 piece? Running Energy Suspension Diff bushes, 4 piece Subframe spacers and Nismo Gearbox mount if that makes any difference.... Cheers James
Thats what I reckon - but its been back 5 times now, retubed again. It has a brand new yoke and uni's as well to avoid any problems - or so I thought :bash: Have tried it with 2 sets of wheels too so not that. I guess on the bright side I can swap tailshafts in 1.5 hours easy now....
lol...unbolt, remove. Place...bolt up. Just make sure you support the drive shaft...it can knock you out if it hits you in the head on the way down...I will attest to it.
I have had a one-peice shaft for several years and have not had any such problem. If you are satisfied that this shaft is straight, correctly balanced and has new uni's/CV joints, then I would suggest that a two-peice shaft is highly unlikely to rectify the problem. My guess would be that the non-OEM Diff & Subframe bushes may well be contributing to the overall result(by being slightly out of alignment/too stiff)and therefore failing to deaden some resonance from the overall system.
Was built by Harder Spicer in Eagle Farm. Trans mount is a Nismo one - about 15k old. Looked fine when I was under there - not sagged/torn.
Did you have any problems with the stock T/S, did it vibrate or make any sounds like you've described, or did this all start when you went one piece.
Some one piece tailshafts due emit a bit of resonance, especially aluminum ones. However, I've rarely heard of a Z owner complain about the resonance. Maybe the ring and pinion in the differential are worn out?
Stock one was fine - just replacing it due to a worn rear uni which was giving some slop when going on and off power.
This is pretty bad - enough to match my fairly loud exhaust . . Diff looked fine when I pulled the back off prior to fitting. Not noisy with the two piece anyway . .
Is that what the cardboard is in normal tailshafts? When i did the clubman tailshaft both the sr20 tail shaft and the 30 year old cortina tailshaft had rolled cardboard in them.
No idea actually - I'll have to check with them. I spoke to them earlier this morning - they have suggested trying a different shaft in the car if someone has one (TT manual 2+2 to NA rear) as they have had some shafts that they can't get balanced in the past - yet others have been 100%.
Ha must be? I've only seen it done with aftermarket one piece shafts, I think they use high density foam these days though rather than cardboard
Have you tried it to see if it does it in neutral or with the clutch in , under acceleration as more info might help.
Mine does the same thing. Grinds really loud when under load, low revs open throttle etc. Ive got the same setup, aluminium 1-piece on a 2+2 with an NA rear end. I got a new tranny mount, clutch, flywheel, thrust bearing fitted. It does it a lot less now, but hasnt disappeared altogether. My theory is messing with the complete design puts everything out of sync. Studied vibration and acoustic design last semester, and learnt that everything along the drivetrain is designed to work together in reducing vibration and noise. Every bit we change from standard can put it out of sync. Also worn out bits, or misaligned bits are the other big cause. I figure replacing all my worn out bits and pieces made it a lot quieter, but i wont be able to get it silent as everythings now lighter and the resonant frequencies (what we want to avoid) have changed. If everything is in top nick, it should be quiet. Somethings probably misaligned or worn out.
Most times a rubber packed steel clamp ring clamped around the tail shaft will fix the transmitted noise problems.A tail shaft manufacture should be able to supply you with one.
Interesting.... Hardy Spicer reckons its to do with the length of the 2+2 shaft..although this still doesn't explain why most don't have a problem! Will have to look into this option..... I think I've seen versions of it on a Honda CRV Front Driveshaft now you mention it!
