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vibration on over run

accoj
Posts: 4
Joined: Sun Jun 25, 2017 2:38 am

vibration on over run

Postby accoj » Sun Sep 02, 2018 2:43 pm

Hi there I have a noise/vibration on over run when at speed around 100kph/60 mph
with my foot down its ok with my foot just feathering still ok but when I lift my foot off I get the vibration Ive tried it in drive also in 3rd and also in neutral
I think it might be the centre bearing
now the big question are they hard to fit as in are they pressed on or just sit there I would like to know before I order one and start on removing the tail shaft
thanks John

naki_k
Super Moderator
Posts: 28673
Joined: Sun Feb 21, 2010 9:25 pm
Location: Kirton, nr Boston, Lincolnshire

Re: vibration on over run

Postby naki_k » Tue Sep 11, 2018 5:50 pm

Quite possibly the centre bearing yes.
The prop will need taking apart. I have taken one off once, and one UJ needed removing to get it off. But it wasn’t too difficult.

As always with XJ40, it’s best mention your VIN/ year/ auto or manual. As there are different versions of this part!
88 3.6 XJ6 PDH/CEM
90 Range Rover Vogue SE 3.9 V8 LPG
91 4.0 XJ6 Manual
92 4.0 XJR Manual
92 4.0 XJR
93 3.2s - 4.0 Manual conv
93 4.0 Sovereign
93 6.0 XJ81 DD6 x2
93 6.0 XJ81 XJ12
94 4.0 XJR
94 4.0 Daimler
96 4.0 X306 XJR
96 4.0 X300 D6
97 4.0 X300 Sport Manual
2000 LR Discovery ES TD5 A
Breaking 40/ 300

naki_k
Super Moderator
Posts: 28673
Joined: Sun Feb 21, 2010 9:25 pm
Location: Kirton, nr Boston, Lincolnshire

Re: vibration on over run

Postby naki_k » Tue Sep 11, 2018 5:55 pm

88 3.6 XJ6 PDH/CEM
90 Range Rover Vogue SE 3.9 V8 LPG
91 4.0 XJ6 Manual
92 4.0 XJR Manual
92 4.0 XJR
93 3.2s - 4.0 Manual conv
93 4.0 Sovereign
93 6.0 XJ81 DD6 x2
93 6.0 XJ81 XJ12
94 4.0 XJR
94 4.0 Daimler
96 4.0 X306 XJR
96 4.0 X300 D6
97 4.0 X300 Sport Manual
2000 LR Discovery ES TD5 A
Breaking 40/ 300

leo_denmark
Posts: 766
Joined: Sun Sep 11, 2011 6:32 pm
Location: Denmark

Re: vibration on over run

Postby leo_denmark » Wed Sep 12, 2018 10:32 am

I once had this humming sound at overrun: https://youtu.be/bcStQHJMEwc

I never found the cause, but it's long gone...
BR Leo Jensen - Denmark
Image
XJ40 3.2 LHD 1992 (VIN: ...660341). Owned since Nov 9th 2005
XJ-S V12 coupe 1977 (SW53309BW). Owned since April 28th 2016. http://www.xj-s.dk/home/
Citroën 2CV 1975. Owned since Sep 1st 1984
Board member of Jaguar Club of Denmark


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