Originally Posted by Eric McCarthy
Dumb question but what can happen or what damage can be done if you DON'T keep the same rolling size tires all the way around like Jack warned us about? He has mentioned if you go an inch bigger on the rear do the same for the front. Or does that just apply to 4x4's because of the front axle having torque placed on it when the 4x4 is engaged.
There is a formular for working it out but when I bought my new Ags the dealer did it for me
Wind up happens when in 4 wheel drive, because there is no diff in the transfer box, so when cornering on tarmac or other hard road surfaces, the front axle takes a slightly larger turning circle than the back, so the front axle turns a few more times than the rear axle, therefore the rear output shaft will want to turn slightly slower than the front output shaft. Now as the front and rear output shafts are locked together, only one thing can happen, the shaft will try and twist, hence the name wind up. It may not be noticeable on soft ground or snow as a wheel may slip and relase the wind up.I have seen an accident when an inexperienced chap tried to undo the uj nuts after a wind up without jacking up a wheel to relase the tension
and nearly lost his finger.