The parts required to rebuild the centre support include the threaded rods which have the rubber spacers and “special” washers which are no longer available. The rubber spacers on mine look like the type used on the fuel tank bolts but smaller and there is no threaded bar fitting just a normal bolt and washers. So quite a lot is not original.
https://www.martinrobey.com/jaguar/classic-saloons/mk-ii-mk-2/prop-shaft-and-final-drive/prop-shaft/automatic-1/200
Update to this problem:
I had the propshaft completely rebuilt by a specialist driveline shop. That is all they do. New UJ’s new centre bearing all balances fine. My (car) back end has been jacked up for 4 months since I did my back in September. I was trying to fathom what was causing the vibration after replacing all the rubbers on engine, propshaft, gearbox (Daimler v8 auto). I have refurbished prop shaft ready to fit. One side has now seized as it is sitting in the weather so I need to get it off the jacks and free up the offside brakes. Before I do that I ran it up to check the noises from the axle. I took a couple more videos of the noise as it is now pronounced as quite a loud rumbling noise. I can hear it from either side and from underneath so not sure exactly where it comes from. I have not checked the oil as I can’t do that at the moment myself. As far as I know it has not had new anything in the axle so will be fun trying to get it apart… Is it possible the vibration is coming from the axle not the propshaft. Once on the ground I will take to the local garage so he can replace the prop and check the axle oil. If it still vibrates we are looking at a big job I fear.
https://youtu.be/l9mwNiNO5k4
https://youtu.be/RjuBPOdF-gU
If you have a problem in the rear differential, or outer axle bearings, I have found it becomes very apparent if the vehicle is jacked up at the rear, and then run up through the gears
It sounds like you might not be up to it atm, and you need a willing assistant, and proper safety procedures, but the faulty part will usually rumble, growl or even scream in a way that is not very apparent with the wheels loaded on the ground
fixing it is another story
Thanks Tony, Did you see the Youtube vids?? The car has been jacked up with no rear wheels since September. I have run it up to 2500 revs and the latest vids and sounds are above?? Can you hear the noises?
I only looked at one, and I thought the video cut short on me, I didnt notice anything
It really helps to be there in person, I am not much good with noises on Youtubes, but when I am standing right next to a car, can hear things better, a long screwdriver as a stethoscope can hep, scary though !
I will have a listen tommorow
They are only short vids. One side is rotating the other is stationary. There is the rasping noise of the disc against the brake pads and then there is also a grumbling noise which emanates from the axle it seems. Similar noise from both sides.
the 2nd one sounds more like the disc or mudshield rubbing, but the speed is to low to expose a bad bearing in my opinion, it needs to be really spinning fast
you could try taking of the caliper and have a good look at what you find, even a rock or stick in the mudshield will cause a strange noise like that
something is not right there…have you tried the the traditional method of moving the wheel to see if it has any free play, indicating a bad outer wheel bearing ?
It’s back on it’s wheels now and will be going to the local shop who has a ramp. I can’t crawl around underneath anymore. Propshaft will be removed and engine run just to check no vibration from the engine end. Then refurbished propshaft fitted. He will check the axle oil. Then I suggest jacking up one side and checking for play in the outer bearings. After that we will see what next…
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Hi Steve (freduk) I joined this forum as I was reading about your vibration issues on your V8 and I have a similar problem that is driving me nuts to resolve, Did you ever sort the issue, I’m down to thinking I may have a worn diff causing prop vibration and noise. Prop been completely refurbished and balanced. Thanks
The problem was tracked down to the engine causing the vibration. I suspected the rear stabilser bush had not been changed when the engine mounts were renewed. I ended up replacing the bush myself but could not release the screw disc underneath to get the bush out. I undid the bush securing plate and you could then see the stress being put on the stabiliser as the engine was now higher but the rear had not been raised in line so this causes a vibration. The situation was immediately much better but I still have a vibration at 35-40mph only. This could be down to fine tuning of the stabiliser height or I have a wheel out of balance as they are wires and I have a very rought access track to my house so maybe the wheels have been knocked out of balance. I am looking for a local shop that can balance wires correctly.
I had my prop cleaned, new UJ’s and balanced but it was not the problem. Neither was the diff as far as we can tell. If you run the car in neutral to 2500 revs is there any vibration at all?
Hi thanks for the reply thats very interesting. Ive had the engine rebuilt and i put in 2 new engine mounts at the front and also a new gearbox mount. Where is the engine stabilizer you refer to, is that the vertical bolt rear of engine at the top, with the donut style fixing? Mine seems ok.
Yes I ran it up to 60mph, knocked the auto box into neutral and i still got the same vibration as the revs dropped. It seems road speed dependant.
Had the prop completely rebuilt and balanced by specislist and there was a lot wring with it i was so hopeful. Prop chap thinks it might be prop alignment but ive got it so the 3 prongs touch as per manual. He says there is more to it than tgat, hes probably right.
Its just a horrendous vibration above 40mph. Im wondering if the hub splines are allowing wherl wobble at speed but they are knocked up tight. And wheel bearings all ok.
Any further thoughts would be gratefully received.
My rear stabiliser wanted to go higher as the engine mounts were renewed but the rear stabiliser was not adjusted to lift the rear end and this is the amount of pressure that was on this fitting:
Got it, thanks. I’m thinking there is some movement associated with my diff, rear axle, bushes or something that’s making my prop move and therefore vibrate at speed so will concentrate on that. It’s the only part of the car that’s not been refurbished and there is wear in the diff I’m sure as the rest of the car was mechanically tired and worn.
Steve, when you jacked the car up, was the car weight on the suspension (i.e the jack stands under the diff/springs?) or was the weight on the jacking points with the suspension hanging down? If the latter, then the test wont prove much since the diff hanging down will cause universal pinion angle problems and that will make noises/shudders and god alone knows what. To test it the car needs to be sitting on the suspension as if it were on the road to be able to emulate the movement in the drive train. I dont know how sensitive this would be but given yo are chasing gremlins, I would think removing as many variable as possible would be useful.
Sorry I am telling you to such eggs…
cheers
PS… Weird noises!!!
It was jacked up under the rear end of the spring so as if on the road.
The propshaft was not at fault as I discovered the rear stabiliser bush had not been replaced with all the other rubber and had not been adjusted either so the engine was pushing up against this bush causing a vibration. I am still fine tuning this operation.
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Trust me… it never ends!
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Has anyone get the prop-shaft that is normally in two peaces get it rebuild in one peace like a Jaguar MK2 has? they are not the same length I have seen but was wondering to get the connection fixation of the prop-shaft in the middle to get rid off it so that I have one peace and no problems anymore.
FYI, Back when the series 2 XJ6 coupes were new there was an issue with propshaft judder on take off from rest, No amount of alignment seemed to correct this to an owner’s satisfaction. The unofficial fix was to eliminate the center bearing and have a one piece propshaft made up and fitted. Resolved the issue completely.
Okey thanks for the info and Im looking to make one and let it calibrated.
Not to be the pooper of the party, but a single piece shaft would be cheaper to manufacture. Surely there was a reason why Jag never went with a single piece in the first place?