Is it rumor or fact ? On a jeep, if you put a spare on that is smaller, bigger, than the other 3 tires, will you damage the diff. ? For example, the doughnut spares that are on all newer vehicles are the norm. They seem to function well with no adverse affects. What say `Ye ?
That is only on all wheel drive jeeps, or like stated above those with lockers. If you run it in 4wd with a smaller spare it can cause problems, but in 2wd on open diff's the odd sized tire will do no harm.
'95 XJ country edition, 4" coils/3/4" spacers, HD leafs with extra main added in, Ironman adjustable control arms, rough country shackles, aussie locker, JK rubicon shocks, 35" mudder's, soft 8's, cobra cb
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If you have a LSD, you are not going to distroy it. A LSD is slipping all the time in normal conditions (cars with donuts have LSDs also) A smaller spare will cause constant slip but it's not going to make it expload or wear it out quickly.
W/locking diff. Dont do it unless it is your last resort...as it would be hard on the components and driving as it would act like you were constantly turning, drive slow...
W/LSD Don't do it unless it is almost your last resort(I wouldnt do it) unless it was the last resort. On a LSD with clutches it would cause wear and is hard on it...still drive slow but would be easier than a locked diff
W/open I would do it, but don't do it for long periods as it makes the diff work harder and causes wear as it would be constantly working the spider gears.
I might end up running a smaller spare, but I wouldnt run it long. Just for me to get somewhere to get the org. tire fixed. This is much better than no spare....
Just for me to get somewhere to get the org. tire fixed. This is much better than no spare....
Having tires of drastically different sizes on an open differential only cause uneven tire wear on the other tire and maybe a little pull from the weight being off balanced from the lean. As others said the LSD/lockers won't like it either.
Short term don't worry about it, long term....... there shouldn't be a long term.