Can tyres affect gearbox?

[khanie]

I've had my gearbox re-built about 1000 miles ago and its started acting up. 1 to 2 is very harsh and it often refuses to go into 5th. I took the car back to the technician who did it yesterday and after scanning fault codes it came up with the selector switch 'impausable signal'? He cleared the codes and said drive it for a while and bring it back when its at its worst. I then mentioned I was having 2 new tyres on the rear on Friday as they are just above legal minimum to which he gave a loud 'Ah ha!!'

Balding tyres can give major problems with the gearbox, something he called 'rolling radius' I think.

Anyone experience this or know anything about it?

I'll let you know on Friday if it does any difference!!!

For interest, I'm, fitting Dunlop SP300 from www.blackcircles.com. The front has nearly new P6000 on.

 

[television]

What absulute rubish, your gearbox does not care or know what tyre,wheels or anything else.

Malcolm

 

[jberks]

As above - complete cobblers. If you have drastically mismatched tyres you could get problems with the diff or traction control but the gearbox couldn't care less. "Rolling Radius" is simply the size of the tyre - meaning the distance travelled for the tyre to make one complete revolution. This has no effect on the gearbox.

I suggest they have another go at the rebuild.

 

[mioba]

come on guys

unless the tyres are square and perhaps made of stone, then they may put some untoward stress on the gearbox.

 

[jberks]

come on guys

unless the tyres are square and perhaps made of stone, then they may put some untoward stress on the gearbox.

If they are square, made of stone or just plain flat, then perhaps, over 10,000 miles, maybe. Otherwise ....I can't see it.
If it were possible to blow a gearbox by slightly increasing the rolling resistance, there is a very steep hill near me and I would have to expect my gearbox to explode every time I drove up it!

 

[bitonw]

come on guys

unless the tyres are square and perhaps made of stone, then they may put some untoward stress on the gearbox.

more the suspension i guess

 

[Rory]

I could vaguely imagine a problem if one tyre was brand new and the other was bald - maybe that would cause an ABS/Traction control prob. I thinks some cars, especially 4x4's, have to have tyres replaced in pairs for this reason.

However if both tyres where more or less the same I can't imagine there being any problem.

 

[television]

I could vaguely imagine a problem if one tyre was brand new and the other was bald - maybe that would cause an ABS/Traction control prob. I thinks some cars, especially 4x4's, have to have tyres replaced in pairs for this reason.

However if both tyres where more or less the same I can't imagine there being any problem.

This was cars fitted with the Haldex 4 wheel drive and all of the tyres had to be within 3mm of each other, mainly the V70SC up to 2000. Does not apply to rear wheel drive only

Malcolm

 

[mlc]

I could vaguely imagine a problem if one tyre was brand new and the other was bald - maybe that would cause an ABS/Traction control prob. I thinks some cars, especially 4x4's, have to have tyres replaced in pairs for this reason.

However if both tyres where more or less the same I can't imagine there being any problem.

If these vehicles cant handle wheels rotating at different rates on the same axle, which is what I assume you mean, how do they get around corners?

Worn tyres cause lots of problems, but not a single one I can think of to effect the gearbox on your car.

Mark.

 

[khanie]

Well the tyres were fitted yesterday and as far as I can tell unsurprisingly it hasn't solved any problems except a smoother ride!!!.

Back to the gearbox company......

 

[television]

Well the tyres were fitted yesterday and as far as I can tell unsurprisingly it hasn't solved any problems except a smoother ride!!!.

Back to the gearbox company......

Goodluck, who was the firm that did the box ?

Malcolm

 

[r.uppal]

yeah yeah yeah

you do not need a new gearbox, you need a new mechnic