What have I done wrong? (Rear Prop)

[Disco Sev]

I have just replaced my 300 type rear prop with a (brand new) 200 type prop and diff flange. All went fairly straight forward I thought although I'm not sure if I fitted the mud shield correctly (just doesn't look right).
Come to drive it and it vibrates like hell in reverse not too bad going forward but terrible sound going over bumps or turning or decelerating :x

Haven't driven more than a few hundred yards and no more than about 20-30mph. Vehicle has a 2" lift but no other mods to suspension.

Just finished as it got cold and wet so looking to plan tomorrows attack :twisted:

Sev

[washer271104]

Were they the same length? Did you need the rubber doughnut between the flanges on the prop and the diff?

[Disco Sev]

Were they the same length? Did you need the rubber doughnut between the flanges on the prop and the diff?

Yep. Props were same length and I didn't use the doughnut, that's what I wanted to get rid of :D

Sev

[driftwood]

is it correctly balanced?

[Disco Sev]

is it correctly balanced?

I assume so because it is new and the arrow marks are lined up.

[Skibum346]

Is it something other than the prop that has been disturbed by the work?

Don't always assume that the thing that's been replaced is the cause... :?

[Disco Sev]

Is it something other than the prop that has been disturbed by the work?

Don't always assume that the thing that's been replaced is the cause... :?

I'm certainly open minded about what it could be. I guess I'll stick the old prop back and see how that is.

My main concern is have I fitted the replacement flange properly :?:  I just removed three hole flange along with nut and washer and fitted four hole flange with new nut and washer but it also had a mudshiel type thing which perhaps I shouldn't have fitted as maybe it is front axle only or something :?:

Anybody done one recently and remember exactly?

Sev

[Budgie]

I tried this with mine and got a vibration from it.
I my case I think it's to do with the lift and the U/Js pulsing like they do on the front when you fit the caster corrected radius arms.

I've got a pair of the Scorpion's cranked trailing arms fitted now and just need the packing washers to go on the chassis end before I try the prop again. These push the nose of the diff down slightly and seem to take out the vibration.

Did you have a thrust washer behind the 3 bolt flange and, if so, did you leave it in there? Only IIRC this isn't required on the 4 bolt flange.
The mud shield does go on there, I just use the one off the 3 bolt flange when I did mine.

[Disco Sev]

Did you have a thrust washer behind the 3 bolt flange and, if so, did you leave it in there? Only IIRC this isn't required on the 4 bolt flange.
The mud shield does go on there, I just use the one off the 3 bolt flange when I did mine.

Thanks Budgie. That gives me something to work with. I didn't notice the thrust washer but I didn't look for it either so it could well be still in there. If there is a mud guard on the three bolt then it looks shallower than the one with the four bolt and also looks welded to the flange :!:

Cranked arms are on the spending list so perhaps some hope there if all else fails :lol:

Thanks,

Sev

[Budgie]

The mud shield is a tight fit but is not welded.  

Well, not on mine anyway.  :D

[Range Rover Blues]

That sounds a lot worse than just the UJs pulsing though :?