So I just bought a IRS complete with a FTBR kit. I removed the pumpkin to switch out the gears, and the shims in the front diff mount feel out. So my first question is, how do I go about setting those up the right way? Second question is what kind of grease should I use for the grease fittings? I looked on the FTBR website, and didn't find anything, also e-mailed and didn't get a response.