Vehicle & Technical > Defender

which prop for lifted defender 2.4 tdci

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scatt:
Im having a bit of trouble with my defender 110 dcpu, its a 2.4 tdci with a +2 lift kit and castor corrected radius arms, cranked trailing arms etc. BUT im getting a nasty vibration at approx 40mph. I was advised to buy a wide yoke prop but this doesnt seem to have cured the problem. ive spoke to lots of people and looked at lots of forums but they all have there own idea. Im really confused and need some help. :?

Jake:
I'll be calling you back monday, just waiting for a reply from my man in LR  ;)
 :D

Range Rover Blues:
Lifted with castor correction, I make no wonder you're getting a vibration (more accurately a pulsing in the drivetrain).

You need a Cardan jointed propshaft, that's one with a CV at the gearbox end.  The axle end is ok becasue with 3deg correction the bottom UJ is almost straight.

DO a search for threads about Cardan joints, it's a common topic.

SteveG:
The castor corrected arms make things worse and 9 times out ten are not necessary on a 2" lift. When you lifted your Defender you increased the working angle of the prop. By adding castor corrected arms you have now dropped the nose of the diff back down increasing the angle at the axle even more. These increased angles and the reason that the the UJ's are now wroking out of sync and this is causing the vibration.

Due to the prop angles of the latest PUMA engine and drivetrain the later Defenders suffer from this more than TD5's which in turn suffered more than TDi's.

The wide angle prop was really bad advice. This just stops it binding at maximum working angles and does nothing for the actual working angles of the prop.

As RRBlues has said, a Cardan joint will help to cancel out the angle differential and stop vibrations. A good custom one from the like of the propshaft clinic that is greaseable will cost about 230 pounds. Don't let anyone advise you to put a Discovery II one on.

Personally, I would take the castor adjusted front arms off and see what vibration is like. If it's gone and steering self centering is fine then I'd leave it at that before spending any more money. I'd also take the corrected arms back for a refund.

Unless you need the lift for bigger tyres, 34-35"+ there is no benefit in putting on a 2" lift and as you've found out it causes more problems. A 1" lift will work fine with tyres up to 35".

Cheers

Steve

scatt:
Thanks for some feed back guys, i ran it for a while without the castor arms because i hadnt bought any and it had a vibration then, BUT the front springs were being compressed more on one side than the other you could also see the dampers sitting a funny angle. So the castor cured that problem and made the steering feel LOADS better, obviously as i now know they have may be contributing towards the vibrations. I ve also been told not to fit disco 2 prop, this is what is causing me so much head ache. :cry:

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