Do Stageas Suffer From Diff Lock

[bakes70]

I have posted a thread last week concerning a fault I have with my 97 RS4 4speed auto were the car seems the pulse when cruising at 70k's or over (the car is soomth as below 70kph). I have replaced plugs, fuel filters, had injectors cleaned, gearbox flushed and new oil put in. I was thinking it was coil packs so have some Splitfires on order.

Any way I was under the car at the weekend and I have noticed my rear tyres are like racing slicks on about a 1/3 on the inside of the tyre. This has only happened in a month after I have had a replacement gearbox. This got me wondering if the Stageas suffer with diff lock...were the diffs get wound up..or somthing like that. Is this possible to happen on a AWD?

If it does I am pretty sure this would destroy the tyres in such a short space of time and explained the jerky drive.

Can anyone help me?

Cheers

Bakes70

[Sydneykid]

I have posted a thread last week concerning a fault I have with my 97 RS4 4speed auto were the car seems the pulse when cruising at 70k's or over (the car is soomth as below 70kph). I have replaced plugs, fuel filters, had injectors cleaned, gearbox flushed and new oil put in. I was thinking it was coil packs so have some Splitfires on order.

Any way I was under the car at the weekend and I have noticed my rear tyres are like racing slicks on about a 1/3 on the inside of the tyre. This has only happened in a month after I have had a replacement gearbox. This got me wondering if the Stageas suffer with diff lock...were the diffs get wound up..or somthing like that. Is this possible to happen on a AWD?

If it does I am pretty sure this would destroy the tyres in such a short space of time and explained the jerky drive.

Can anyone help me?

Cheers

Bakes70

Do you have different tyre diameters front and rear? To upset the ATTESA it usually requires more than just brand new tyres on the front and worn out ones on the rear.

The inside tyre wear is usually due to excessive negative camber and/or excessive toe out.

Cheers

Gary

[bakes70]

Gary,

Thanks for that mate. All four tyres are 215/50 ZR 17.

I have booked the car in to have the wheel alinment checked and that the wheels are all balanced correctly?

I am just trying to eliminate factores that could be causinging this problem. I am beginning to worry that it might be a gearbox problem. The car did not have this problem before I had a replacement box fitted. It could be coincidence and the coil packs have given up the ghost or it could be the gear box or a problem with a diff.

Do you have any ideas?

Cheers

Paul

[rb26stagea]

stupid question: have you checked the attessa fluid level/quality?

Just a thought, but better me looking like captain obvious than you chasing a simple problem!

[Mr_RS4]

Don't be too surprised about worn tyres front and rear causing pulsing problems. I've had huge problems with this in the past. It all started when my front tyres were very worn on the inside (bad alignment and excessive camber, still runs a little to much but they're wearing much better now) so I got new tyres on the front and left the rears as they still had plenty of tread left.

But the car didn't like this one bit, after about 60kmph it would jump and pulse around. After trying different tyre pressures I swapped the front and back around and bingo fixed the problem but then as the fronts (old rears) wore out I put new tyres on the front (there wasn't much time in between the first and second set of tyres) so essintially I had 4 new tyres of the same size (or so I thought and it was according to the lables on the sides of the tyres).

Although I had the same size tyres they were different brands, and the same problem came back so I tried the swap trick again. But as I was swapping the tyres around I put them side by side and you could actually see a difference, not a huge one but it was there, I guess just different ways of making the tyres (there would have been no more than a month - month 1/2 betweeen the 2 sets). And it fixed the problem once again and the tyres are wearing fine now and no more shudder or pulsing.

So my suggestion would be to try swapping your tyres around when you get the alignment done and see how you go!!!

[bakes70]

Don't be too surprised about worn tyres front and rear causing pulsing problems. I've had huge problems with this in the past. It all started when my front tyres were very worn on the inside (bad alignment and excessive camber, still runs a little to much but they're wearing much better now) so I got new tyres on the front and left the rears as they still had plenty of tread left.

But the car didn't like this one bit, after about 60kmph it would jump and pulse around. After trying different tyre pressures I swapped the front and back around and bingo fixed the problem but then as the fronts (old rears) wore out I put new tyres on the front (there wasn't much time in between the first and second set of tyres) so essintially I had 4 new tyres of the same size (or so I thought and it was according to the lables on the sides of the tyres).

Although I had the same size tyres they were different brands, and the same problem came back so I tried the swap trick again. But as I was swapping the tyres around I put them side by side and you could actually see a difference, not a huge one but it was there, I guess just different ways of making the tyres (there would have been no more than a month - month 1/2 betweeen the 2 sets). And it fixed the problem once again and the tyres are wearing fine now and no more shudder or pulsing.

So my suggestion would be to try swapping your tyres around when you get the alignment done and see how you go!!!

Thankyou for this info. I will try this. I will be gutted if this is all my problem is as I have spent a few dollars trying to troubleshoot fault. Did you get the problem at all speeds or once you went over a certain speed, as my car does not start to pulse/shudder until I get to 70kph or above.

I will let you know how I get on.

Cheers

bakes70