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well thats very odd

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well thats very odd

Postby thevanwizard » Tue Apr 02, 2024 5:15 pm

Done a job on my transit today that i been meaning to do for a while'
changed my front wheels to the back and vise a versa as my front tyres are a bit bigger so though be better on the back being a 2.4 rwd.
ive then proceeded to go and rescue my broken down daughter all of a sudden my abs light and traction control came on felt ok so continued van actually felt quicker , but after a further 5 min i then get handbrake light come on and the speedo and mileage part of the dash stop working.
anyone any ideas as all i did was swap my wheels is it still ok to use
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Re: well thats very odd

Postby Airthies » Tue Apr 02, 2024 6:04 pm

Depending how much bigger, the difference could be throwing the abs faults as wheels are spinning at different speeds.
It might be just on the borderline as to why it didn't throw a hissy fit with them the other way round.

Swap back and see if it's back to being ok

Not sure about Speedo and milage issue thought...


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Re: well thats very odd

Postby metalworker0 » Tue Apr 02, 2024 6:07 pm

Umm mate had his tyres changed and that happened .
turned out disturbing the wheels caused magnetised rust to stick to the abs sensors, caused by tyre shop walloping the wheels with a big rubber mallet, to get them unstuck from the hubs...that's according to the garage who are fixing it. - TODAY

Reckons the rust dust has damaged abs sensor ..so has to be replaced. this was a skoda yeti

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Re: well thats very odd

Postby knobby1 » Tue Apr 02, 2024 7:49 pm

thevanwizard wrote:Done a job on my transit today that i been meaning to do for a while'
changed my front wheels to the back and vise a versa as my front tyres are a bit bigger so though be better on the back being a 2.4 rwd.
ive then proceeded to go and rescue my broken down daughter all of a sudden my abs light and traction control came on felt ok so continued van actually felt quicker , but after a further 5 min i then get handbrake light come on and the speedo and mileage part of the dash stop working.
anyone any ideas as all i did was swap my wheels is it still ok to use


Assuming Mk7..?? You don't actually say what model Transit you have..??

Wheel/tyre sizes must be withing a small % of each other or the ABS/TC system will throw a hissyfit. As Airthies says, why it didn't do it before swapping the wheels around is a bit of a mystery. :?

Speedo/odo is driven by the ABS sensors on Mk7 so must be an issue there.

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Re: well thats very odd

Postby thevanwizard » Tue Apr 02, 2024 11:29 pm

ok guys thanks for that will swap them back tomorrow and see how it goes :shock:
its a mk7 2.4 rwd
tyres that were on the front now the back are 215 75 16 which i believe are the correct size :D
tyres that were on the back now the front are 215 65 16 so not much in them will see how it goes :roll:
if ok ill get the bigger tyre for rear as looks a bit odd big at front small on the back especially when towing :wink:
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Re: well thats very odd

Postby Airthies » Wed Apr 03, 2024 12:04 am

Tyre sizes are deceptive, as the profiles 65 & 75 are percentages of the tyre width.
So
215/65R16 = 686mm diameter
215/75R16 = 729mm diameter

So about 40 - 50mm difference in height and 20-25mm in radius.

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Re: well thats very odd

Postby knobby1 » Wed Apr 03, 2024 12:48 am

thevanwizard wrote:ok guys thanks for that will swap them back tomorrow and see how it goes :shock:
its a mk7 2.4 rwd
tyres that were on the front now the back are 215 75 16 which i believe are the correct size :D
tyres that were on the back now the front are 215 65 16 so not much in them will see how it goes :roll:
if ok ill get the bigger tyre for rear as looks a bit odd big at front small on the back especially when towing :wink:


As mentioned by Airthies...those sizes are quite different to each other...not surprised you got an ABS/TC issue.

Rolling circumference is 2155.4mm vs 2293.6mm...so a difference of ~135mm per revolution.

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When I die, I want to go peacefully in my sleep like my Grandfather, not screaming like the passengers in his car..!
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Re: well thats very odd

Postby thevanwizard » Wed Apr 03, 2024 12:59 pm

problem has sorted itself out when i drove it this morning speedo working abs and traction control of. :roll:
i have however since my run out swapped wheels back around just in case it comes back. will get 2 larger tyres for rear if any pop up :)
THANKS for the input :mrgreen:
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