Whining/rubbing noise coming from rear end. It's louder when in gear and I let off the gas. I was told I likely need new gears but should replace the different just in case it's not the problem. My question is, if I order 3:91 gears and the install kit, will it fit in the stock pumpkin? I ask this because I heard stories of people buying some and them not fitting. Could it have been that they bought defective or wrong brand? I plan on getting mine from the difftechnics company (I know we're not supposed to mention websites) in Australia.