nescoob

Hi I have a 98 Type R V4 and when i alter the adjustable diff I get a judder through the steering wheel when parking the car. Anyone have any ideas on what the problem could be?

Thanks

sg72

Not answering this in case I get shot down.(OK Try).

Just to say "Keep it on Open diff when doing slow manouvres.

As moving diff swich up towards LOCK causes front diff to lock upcausing equal drive to front wheels.

Therfore no slip.

So when turning steering both wheels are transmitting power in unison,and inner wheel is travelling shorter distance this will start to spin.

Depending on grip surface.

This can cause a skip effect causing Judder.

(Preparing to be accused of talking Sh1te.)

STI 5 Type R. Past 18 months.

Steve

nescoob

Cheers Steve, makes sense to me.

Simon

greasemonkey

The diff should be right down for all low speed driving, including reversing, parking, and turning tight corners. You should rarely, if ever, need to drive with it in the Lock position on tarmac, and doing so can cause very odd handling in tight corners, as well as the nasty noises you've already experienced.

Yes and no. The thumbwheel adjusts the preload in the centre diff, not the front one. So, when you turn it up, it's the front and rear axles that progressively lock together.

You're thinking along the right lines, just with the other diff. The front differential is still free to vary the speed of the inner and outer wheels, but the whole front axle will want to travel slightly slower the rear when turning into a corner, and will want to go slightly faster at other times.

If the centre diff is locked, it won't be able to do so, so the wind-up will build until one of the wheels breaks grip, or the locking force applied by the electromagnets is overcome and the diff eventually slips, causing the judder and unpleasant sound as it does so.

Tut tut. Eighteen months and you still haven't worked out which diff the thumbwheel is acting on.

nescoob

Just to point out that it was never set on full lock, only moved up one from the bottom setting, would this still cause this judder?

Thanks

sg72

Yes you're right Greasemonkey.

18 months and only started using the diff control 6 months ago.

after briefly reading through J. Felsteads.

Explanation.

Beforehand I had been scared off by a read through the FAQ before

I bought the car.

It realy does work! (I just didn't fully know how.)

Ta! for filling in errors.

sg72

......and yes nescoob.

It does do it on just one square up.

Steve.

nescoob

Thanks for the replies.

Simon