my zedo is making a violent vibration at low revs and there is alot of space in the tailshaft so i suspect its the uni joints, is this a serviceable item and if so wheres the best place to source uni joints or a good tailshaft?
If it's the OEM two piece driveshaft, the uni's aren't really serviceable as they are "staked" in position. Whereas aftermarket driveshafts & uni's are held in position with circlips. You're probably better going for a one piece unit.
Check your rear cradle mount rubbers as well - this can cause a similiar thing, as well as put space in the joints if they are really worn out. may not be related to it at all, but good to check them out while your under there anyway - Z is on 20 yrs old now and it can do the violent shudder as well
I get a slight vibration too, but only in the morning or after its sat for the day. starts at 80 then smooths out to not much at all. If its a bearing issue how come the vibrations seem to go after ive driven for a bit and it heats up? Ive talked to a "drive shaft specialist" and he says that just replacing the shaft wont always work or help. The one piece shaft he says has a limited top speed it can spin at (ive forgoten the term he used) before it explodes thats why nissan put this two piece in.... he said to me the best! solution is to put a commodore two peice in
I, and many others, have been using one-piece driveshafts in our Twin Turbo 300's for several years. I have never heard of a one-piece shaft "exploding"(other than someone who had a faulty Carbon Fibre item). I would look for a different Drive-shaft "specialist' if I were you. BTW, the symptoms you describe are very common with worn-out Centre Bearings(in the two-piece, stock drive-shaft)as that bearing is surrounded by a rubber ring which sags over time and usage. After driving for some period, it will soften and allow the bearing to droop down a small distance. During a period of being 'Parked' the rubber cools and becomes more rigid, so the drive-shaft is then slightly out-of-alignment and when you start to drive again, there is an imbalance & vibration due to misalignment(this can disappear after a short time, due to the rubber heating up and allowing the shaft to get back into alignment)but it will get steadily worse until it is replaced. All of this can be fixed by either replacing the Centre Bearing(until it happens again in the future)or by fitting a one-piece drive-shaft, thereby eliminating the Centre Bearing issues.
Thanks mate, yeah I mean I can live with for now, and because it's not all the time it really isn't too bad, it's not going to damage anything is it if I let it linger on?
That can't be guaranteed because there is a possibility that the Centre Bearing may eventually disintegrate(which could allow the drive shaft to drop onto the roadway). I have not seen this occur in a Z32, but I did witness it some years ago during a Motor-racing event at Oran Park(causing the car to somersault end-over-end, like some mechanical High-jumper). You would be better advised to get it fixed sooner, rather than later.
