Sorry Frank, it didn't make this noise with these tyres on and the old diff in there. I didn't change the diff and the tyres. I can play a tune on the diff on and off the power, Whirr, hmmm, whirr, hmmm. It's not the tyres. I have been here three times before. I am just kicking myself that I forgot the damn diff made so much noise when I picked it from the pair I had. Half minded to pull the bastard this weekend and put the other one in. Other than I'll probably find that one's even noisier.
I have had these tyres on two cars and they waft along beautifully. No noise at all. Jon has driven it and so has the North's leading potato merchant and I don't think they noticed anything.
I have had three 80's Frank and not covered anything like 24 000 miles across the three for them and yet I have done in excess of a dozen front diff oil changes. Shattered CVs, ratio changes, mar tacking shafts, diff bearings it's an endless list. Each time the oil has come out looking nasty and that's with virtually new seals in too. Many of those changes were with this particular diff. Which is sort of my point I think.
It's the devil's diff. Other than an exorcism, JW's the only answer I think. Nurse prepare the anaesthetic. I'm going in.