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Prop diff issue on cater ham
INDY BIRD - 29/3/12 at 08:56 PM

Hi all

Rebuilding my bros caterham and seems to be a small issue with the diff or prop,

When you rock the car back and forwards in a straight line it is as smooth as silk,

But if I turn the steering wheel on lock and push the car the rear diff is making a strange clinking noise as if it is jumping, really struggling to understand why?

As when wheels are straight it's nice and smooth,

Any ideas welcome at first I thought it was something jammed in the prop but it's not,


By the way its a live axel car if this helps.


Thanks
All

daviep - 29/3/12 at 09:02 PM

Does it have an LSD?

INDY BIRD - 29/3/12 at 09:17 PM

As far as I'm aware it does yes have LSD

loggyboy - 29/3/12 at 09:18 PM

Sounds like the the sun/planet gears are damaged. They arent used untill differential movement is instagated so wouldnt show signs of the damaged when pushed in a straight line.

garybee - 30/3/12 at 12:11 AM

It's wrecked, i'll give you a fiver for it! (read it's probably fine, I bet it's a zf plate type LSD and they do that).

alister667 - 30/3/12 at 12:19 AM

Yep, I was about to post that plate type diffs (I've heard an Xtrac) make the most horrible cracking noise as they slip. You'd swear something expensive was badly broken! Find out more about the LSD before taking it apart I'd suggest.
If it's a viscous stlye LSD you could be in trouble.

omega 24 v6 - 30/3/12 at 05:31 AM

LSD cracking . no worries.

INDY BIRD - 30/3/12 at 06:44 AM

Thanks all I new you would help,

The car is an ex race car so prob got as said that type of diff?

Thanks for the advice

Sean

garybee - 30/3/12 at 12:06 PM

quote:
Originally posted by INDY BIRD
Thanks all I new you would help,

The car is an ex race car so prob got as said that type of diff?

Thanks for the advice

Sean


If's it's an ex academy car then it won't have had one whilst racing (unless someone was cheating wildly).

Easy way to check... Lift the rear in the air, put it in neutral and turn one of the rear wheels. If the other turns in the same direction you have an LSD and don't worry about the noise. If the other wheel turns the opposite direction, you have an open diff (or a Quaife torque biasing one, had to mention this for the pedants) and the noise is a problem.

INDY BIRD - 30/3/12 at 02:18 PM

Hi the car competed in the barc nw championship, Robbia birrell I believe, it was a benetton coloured car,not STD in any shape or form,

Thanks all again

bigfoot4616 - 30/3/12 at 07:28 PM

my tran-x(plate diff) does something similar to yours.