Disco 1 Rear prop doughnut

My rear propshaft coupling is starting to show signs of cracking, still has plenty of life left in it but I'm wondering whether it would get through the MOT.
Does anyone know whether this would generally be deemed as a failure or not? Photo below..
Thanks

It's crakerd !
Needs changing before it lets go

Change it ASAP as it will get worse and worse the more you drive and it could detach when you are driving at speed
Regards
Jonathan

get rid of the doughnut all together

ok thanks, a bit annoying as its only lasted me 18months

Ours has been on for 6+ years on a V8 that tows a lot.

Fitted properly they should give 5+ years at least if a genuine one, the cheap ebay ones are not good, and they need fitting correctly.

That doesn't look like a genuine part in the picture, compared with a genuine one on my desk here.

Peter

Change it and change the pin also.

Never had any issues either with the factory fitted doughnut fitted on my RR in my 10 years of ownership, the vehicle was used 7 days a week although never towing or off road.

Doughnuts were not fitted on the 300 series D1 V8, why would they be, I still don't tow or go off road.

that was the state of mine, changed it sunday too me about half hour. i didnt change the bearing though just took the 3 nuts out of the read diff flange pulled the prop shaft back a little then undone the 3 bolts on the prop shaft side. pulled it back just enough to move it to the side and change the prop coupling then push it back in place and bolt it back up. made hell of a difference to the way it feels while driving also. get it done even if you go for my option.

cheap part from paddock
http://www.paddockspares.com/tvf100010b-propshaft-rubber-coupling.html

i dont expect it to last long but its an easy part to change

Various qualities of rubber doughnut on the market. Go for the ones by GKN, they are marked. Remember to install it the right way round; the little arrows on the side should point towards the flange. The prop shafts are the only place where you'll find 9/16 AF nuts and bolts.

not sure on the whole sizes thing but the bolts i took out and the new ones i had with the doughnut were all 19mm, took them off with battery impact wrench put them back on with spanners. on this subject how tight should they actually be. i just done them up TIGHT with 2 spanners, could get more with a bar or like i say i have the impact but didnt want to over tighten them

gR@HaM said:

My rear propshaft coupling is starting to show signs of cracking, still has plenty of life left in it but I'm wondering whether it would get through the MOT.
Does anyone know whether this would generally be deemed as a failure or not? Photo below..
Thanks

Click to expand...

No, tis deaded...

ceffyn said:

not sure on the whole sizes thing but the bolts i took out and the new ones i had with the doughnut were all 19mm, took them off with battery impact wrench put them back on with spanners. on this subject how tight should they actually be. i just done them up TIGHT with 2 spanners, could get more with a bar or like i say i have the impact but didnt want to over tighten them

Click to expand...

According to RAVE, they should be torqued up to 76 Nm or 56 lbf.ft. But I would think that "F-tight" would be effin' tight enough.

Mine is also looking on the way out, heard people change the rear prop to one from a Disco 300tdi to completely get rid of the doughnut?

Shane.

Many/all 300tdi Discos are donutted, 200s had UJs. Certainly the case for me, every 300tdi disco had rubber, and all the 200s proper joints. Never owned a V8 disco so can't comment if powerplant made any difference.

As for the OP, yeah, I would be changing that ASAP, dropping a prop end and then trying to remove kerbside it to get home in 2wd is a pain.

Seffy said:

Many/all 300tdi Discos are donutted, 200s had UJs. Certainly the case for me, every 300tdi disco had rubber, and all the 200s proper joints. Never owned a V8 disco so can't comment if powerplant made any difference.

As for the OP, yeah, I would be changing that ASAP, dropping a prop end and then trying to remove kerbside it to get home in 2wd is a pain.

Click to expand...

Ah I see, so its actually a 200tdi prop? Does this fit across reasonably straight forward?

Shane

ShaneMitchinson said:

Ah I see, so its actually a 200tdi prop? Does this fit across reasonably straight forward?

Shane

Click to expand...

define straightforward!

The diff input will require a swap too, from 3bolt donut to 4bolt UJ IIRC. Not something I have done personally.

Seffy said:

define straightforward!

The diff input will require a swap too, from 3bolt donut to 4bolt UJ IIRC. Not something I have done personally.

Click to expand...

Will have a look into it closer to when I need to swap it! Thanks for the help.

Shane

You can buy the replacement rear diff input flange, they are reasonably cheap, the problem is then you need to replace the tailshaft with the uni joint type that may not be so cheap, unless you can pick one up from a dicarded 200 Tdi, some guys have even modified their old three bolt spider type shaft by cutting the spider end off, (bit that the doughnut bolts to), and welding a Hardy Spicer yoke onto it, but it needs balancing after that, in all not so simple. The Doughnut type is not so bad and if you avoid the cheap brands you'll get a good run out of one, though not recommended for harsh rock hopping ops.

Never had a donut fail on me, and only ever replaced one as a matter of routine. UJs, rebuilt replaced several, had the rear one of the front shaft fail, left a great big dent in the transmission tunnel. Most folks don't bother maintaining under there properly, hence the number of dry and loose UJs I have come across.