New Spare Wheels
Submitted: Monday, May 16, 2011 at 11:56
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Member - Desert Storm (QLD)
I was wondering if someone could shed some light on transfer case damage if a brand new tyre was put on the front of the vehicle, and the other front tyre was 70-60% worn. I have bought a vehicle with four worn tyres, and the spare is still on the carrier brand new.
would it be a safer option to put the new tyre on the rear, and then change the worn rear tyre onto the front to eliminate any transfer case damage?
thanks,
John
Reply By: disco driver - Monday, May 16, 2011 at 12:11
Monday, May 16, 2011 at 12:11
John,
Most of the modern constant 4wd setups need all the tyres at about the same amount of wear, putting a new tyre on one wheel would put a lot of extra work for the diff rather than the transfer case. Not a good idea except for emergency use.
As a general rule the best pair of tyres should be on the steering wheels (ie, the front) but there should not be much variation front to rear anyway.
If it was me, I'd leave the spare where it is and fit a full set of new tyres to the vehicle regardless of the condition of the spare.
Hope this helps.
Disco
akaTony
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Reply By: Wayne (NSW) - Monday, May 16, 2011 at 13:27
Monday, May 16, 2011 at 13:27
John,
If you had to put a new tyre on the same axle as a worn tyre I would put it on the rear axle.
If it is not a big difference in tyre diameter the diff will handle this OK.
Putting different size tyres on the front would effect the braking and steering of the vehicle.
If it is a constant 4wd all 4 tyre should be the same or at the very least, same size tyres on the same axle.
Wayne
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Follow Up By: blown4by - Tuesday, May 17, 2011 at 22:40
Tuesday, May 17, 2011 at 22:40
Not a good idea to put a worn and new tyre on the rear because the diff and the LSD clutch plates have to compensate for the differing diameters ALL the time whereas on the front it only has to do this when 4WD is engaged in which case you would be on an usealed surface so the tyres can slip anyway and the front diff is not a LSD.
As the front wheels do all the steering and 60% of the braking (and most of the weight in an unloaded Patrol) I would rather one new tyre and one worn tyre on the front than two worn tyres. Obviously two new tyres would be the preferred option.
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