Can anyone help me with this one please . Ive fitted a new prop and vcu to my car tonight as the old vcu had gone very tight . But now I've got a terrible wobble that you can feel right throughout the car . They don't have to be lined up or matched do they ? Don't think they do . I've fitted the bearings straight so can't think what else it could be the rear diff mounts aint the best but this wobble wasn't there before thank you
Hi, yes the prop(s)/vcu have to be a lined up correctly, front to back but I can't remember the the measurements, (they're in the haynes manual or if you can access the genuine one on line somewhere or someone will doubtless be along with the info/pictures). The vcu support bearing carriers have elongated slots in them to aid alignment. We're the props new or second hand ? These should be balanced (you may see balance weights on the prop(s) outer surface. I must admit it sounds more like prop(s) out of balance as the vibration/wobble wasn't there before (not sure if this should be done as a complete unit, props & vcu). Even if you separate the props/vcu just to replace the carrier bearings you should always mark them so they go back together exactly the way as they came apart. Sorry I can't be more helpful I hope you get it sorted.
Nodge68
Well-Known Member
Are the tyres identical, same make, same type, all pumped up to the same pressure, with the least worn on the rear?
Yes
All bolts are tight . The rear mount aint that bad but I will be changing them very soon
The old prop and vcu where fine as in no wobble or judder just the vcu had started to go a bit stiff so I swaped the whole thing over . I will need to check the front cv or I may even just swap the front part of the shaft over
Its a whole prop
Nodge68
Well-Known Member
So it's likely that the replacement you fitted was damaged, or the VCU is worse that the one you had.
The vcu must be better as a whole the car drives much better im suspecting the front cv
Nodge68
Well-Known Member
There's something wrong, as you have a vibration. My guess is the replacement is worse than the one you removed. Its always better to keep your propshafts and simply fit a quality reconditioned VCU, rather than take a chance on a completely unknown second hand one.
andyfreelandy
Well-Known Member
Let us know why you can't remove the front section.
Its just won't budge . I've soaked it with plusgas chisel just won't go
