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I have recently changed out my standard GU/ST 2.8TD 1999 Wagon 4.625 diffs with 5.13 ratio diffs, I am very happy but am currently running 265/70 R16 Goodrich tyres that are due for replacement, I was waiting for them to wear out before i went for larger diameter tyres.
Has anybody done this diff ratio change or can direct me to any tables that give some ratio/tyre size information or even what tyres you fitted if you,ve done the mod.