XSeries-forum

:-[

Sorry about posting another thead about tyres but having searched I am struggling to find an exact answer to my problem!

I have had my X5 a couple of months and the rear tyres had just about 2mm left so decided to swap them. Having looked at options and as I dont do many miles a year I have gone for the Pirelli PZeros 315 35 20 (rather than the more expensive star marked tyres). The fronts have a set of Goldway tyres (never heard of these) 275 40 20 with about 5mm on so I thought these would be ok for a while and then I could look at replacing these for Pirellis in due course.

Now since changing them last weekend the car has gone mad! On the Saturday I had them done other than the odd wobble it wasnt too bad, but over the next few days driving the car has been terrible. It shifts gears at wrong times, theres a slight grinding sound and it feels like at times I am driving on tram tracks
I have since read about having to replace all four at one time (and potential damage to the transmission and transfer box- hopefully this hasnt happened) so I am thinking of putting two new ones on the front to see if this corrects it. For a couple of new Pirellis its looking at about 450 but I am a bit loathed to do this in case it doesnt fix the issue. A friend of mine can get me a full set of 4 accelera iota for £300 fitted so I am thinking of giving this a try to see if it solves the issue. If so I can then get the Pirellis and sell the acceleras on ebay and it get me a bit of cash back...

Would be interesting to hear other peoples thoughts before I go ahead with this, thanks

I am not aware of the E53 suffering from a difference of thread depth between tyres which is basically what you are saying, if the front has 5mm new rear will have 8mm, only a difference of 3mm. Your old set up with 2mm rear and 5mm front is the same difference only the other way round. Your problem could just be a coincidence thats popped up after tyre change. As far as I know it is the E70 which has a different transfer box which suffers this problem. I'm sure there will be much more clued up people on later who will give a better answer.

[quote="dani_armo"]
:-[

Sorry about posting another thead about tyres but having searched I am struggling to find an exact answer to my problem!

I have had my X5 a couple of months and the rear tyres had just about 2mm left so decided to swap them. Having looked at options and as I dont do many miles a year I have gone for the Pirelli PZeros 315 35 20 (rather than the more expensive star marked tyres). The fronts have a set of Goldway tyres (never heard of these) 275 40 20 with about 5mm on so I thought these would be ok for a while and then I could look at replacing these for Pirellis in due course.

Now since changing them last weekend the car has gone mad! On the Saturday I had them done other than the odd wobble it wasnt too bad, but over the next few days driving the car has been terrible. It shifts gears at wrong times, theres a slight grinding sound and it feels like at times I am driving on tram tracks
I have since read about having to replace all four at one time (and potential damage to the transmission and transfer box- hopefully this hasnt happened) so I am thinking of putting two new ones on the front to see if this corrects it. For a couple of new Pirellis its looking at about 450 but I am a bit loathed to do this in case it doesnt fix the issue. A friend of mine can get me a full set of 4 accelera iota for £300 fitted so I am thinking of giving this a try to see if it solves the issue. If so I can then get the Pirellis and sell the acceleras on ebay and it get me a bit of cash back...

Would be interesting to hear other peoples thoughts before I go ahead with this, thanks
[/quote]
the accelera iota tyres are very good budget tyres, i can say that because i use them ! i decided to try them last year as the camber wear on the rears is the worst on any car i have owned, it wore new yoko rears down in 20,000 miles, so far the accelera's have done 10,000 and dont look much worn at all, i did have the rear camber adjusted to toe in more when they were fitted and they are now wearing more or less evenly.
i have actually had new front acceleras fitted today and the handling/tracking and ride is loads better.....great set of tyres for £240 (4 of) delivered.

as for the shifting gears at the wrong time then that could possibly be something to do with the new tyres and the computer not recognising a larger turning circle....i.e if the old tyres were changed at 2mm for new ones with 6.5 mm then the 4wd system may be confused so the gear changes may now be out of sync, I would try a gearbox reset/re-calibration ("how to" post on here somewhere), i do it every now and then and it does make a difference!

The gearbox reset is only to do with throttle adaption.  Tyre changes should have no effect at all.  Grinding noises are a sign something isn't happy in the driveline.

Gear changes in odd places could be a sign of a hydraulic pressure issue in the gearbox, or torque converter, or any number of related issues.  You may well not get any warning lights at all, only errors recorded in the on board system (not a good design IMHO).  The warning lights frequently appear only when it is too late!

Might be worth getting the transmission error code log read to see if anything is stored in there.  Whilst they are doing that, you could get the oil sampled at the same time.

E53s do suffer diff issues as well as transfer box failures the same as the later models.  Not as badly it seems, but they still occur.  Tyres with more 'off road' tread have been reported on here as causing trouble.

Make sure that whatever non-OEM tyre types you use that the weight rating is the same as, or higher than the number showing on the tyre pressure label (B-pillar).

Thanks for the replies everyone

I have today gone ahead and had the acceleras fitted and the car immediately drove a lot better, ended up costing just under 300 for the 4 so not too bad for a set. I think I will leave these on for a while and hold off the Pirellis for now.

I have still noticed a little bit of a grinding noise and slight revving in lower gears but once the car gets going it seems fine. As I drove about 100 miles with the miss-matched tyres I am now worried it has caused some damage so will probably drive it for a week or so and take it somewhere to be looked at.

I actually parked up next to an identical car earlier and he had Kumhos on his 20's and I asked if hes had any issues and he says it drives fine so it cant be the none * marked tyres

[quote="chelsea"]
the accelera iota tyres are very good budget tyres, i can say that because i use them ! i decided to try them last year as the camber wear on the rears is the worst on any car i have owned, it wore new yoko rears down in 20,000 miles, so far the accelera's have done 10,000 and dont look much worn at all, i did have the rear camber adjusted to toe in more when they were fitted and they are now wearing more or less evenly.
i have actually had new front acceleras fitted today and the handling/tracking and ride is loads better.....great set of tyres for £240 (4 of) delivered.
[/quote]

20,000 miles from a set of tyres on the X5 is not bad at all - it's a big lump of a car, so don't expect to get the same as you would out of a set on a Fiesta.


Turks

[quote="dani_armo"]
Thanks for the replies everyone

I have today gone ahead and had the acceleras fitted and the car immediately drove a lot better, ended up costing just under 300 for the 4 so not too bad for a set. I think I will leave these on for a while and hold off the Pirellis for now.

I have still noticed a little bit of a grinding noise and slight revving in lower gears but once the car gets going it seems fine. As I drove about 100 miles with the miss-matched tyres I am now worried it has caused some damage so will probably drive it for a week or so and take it somewhere to be looked at.

I actually parked up next to an identical car earlier and he had Kumhos on his 20's and I asked if hes had any issues and he says it drives fine so it cant be the none * marked tyres
[/quote]


How you getting on with the tyres?

I find it frustrating as having never driven another X5 before. I have a decent set of Kuhmos on the rear and some Chinese shit on the front and in the last three months it has got me through all conditions of a Scottish winter and not slipped an inch.
Would love to know how these cars would drive with the 'perfect' set up.
Lower control arms this weekend before I invest in new tyres and tracking.

[quote="gavp84"]
How you getting on with the tyres?
[/quote]

Heres a recent update 

http://xdrivers.co.uk/forum/index.php/t ... 777.0.html