Re: 5kQ: Tranny code AGD

[paul.heneghan@bbc.co.uk (Paul Heneghan)]

From: steveb@falcon.kla.com (Steven Buchholz)

>reported yesterday I cannot lock the center diff on this car without
>having the driveline bind up on me.  The 5kCSQ fiche does not even men-
>tion any transmission option other than AES.  I'm thinking that someone
>swapped the tranny and was unaware of the different FDR.

Hello Steve.

What about trying this:

Put car in neutral with handbrake on.
Jack up one side of the car (both front and rear).
Use chocks to prevent the car moving and then release handbrake.
Lock the centre diff - check green light is on - rotate a wheel if 
necessary.
Mark position of both unlocked wheels with a bit of chalk.
Rotate one wheel exactly 10 revolutions.
If your ratios are right, then the other wheel will also rotate exactly 10 
revs (allow a small error (+/-10degrees) for transmission slack.  If this is 
the case, then tyre diameter differences are probably responsible for your 
problems.
If you have a 4.1 on one axle and a 3.9 on the other, then the other wheel 
will do 9.5 or 10.5 revs.  If this is the case, you can start swearing.

If you have different ratios on front and rear, then you will always be 
working the centre diff, even when going straight, but only by a small 
amount, a lot less than driving with the steering on full lock.  It should 
be able to cope - it might help to give it regular oil changes.  However, 
you can never lock your centre diff.

Interesting!

Paul
paul.heneghan@bbc.co.uk
1984 Audi 80 quattro
1989 Audi 100 Avant