Hi! I was just wondering about my 200B diff, in the manaul that I have for the car it says for a sedan without IRS it will have a Borg Warner which will be 3.89:1 regardless of whether its an auto or manual. Is this the "H165"?? Its a khanacross/autocross car, so I figured that the lower the ratio, the better it will be. It has a 45DHLA, extractors, and a 2" system, and a stripped interior, so it goes *OK*, but the faster the better, eh?
Currently the diff is open, but a locker will be going in when I find the right ratio. I figured about 4.11:1 and up would be best. Where do I find these ratios? I heard something about a C20 van having about a 4.9:1 ratio, but I dont know whether the centre will go straight in... What other diffs are there that will bolt in without major mods, H190 and the like? Once you've locked a diff, is that that centre locked for good? Or can you still change ratios? Because if I find one of these low ratio diffs I didnt want to ruin it by welding it. Guru help would be good, someone like Baz would be beneficial to answer in this topic 