I have a 95 wrangler and when i take off from a dead stop I am getting a rattle and vibration. It never does it any other time except when taking off in first gear. Is my clutch getting weak or is it my gear ratio or something else? I just bought the jeep and it has a 4 inch lift with 33's and i am pretty sure it has stock 3.07's. I have a set of 3.73's I am getting ready to install. What kind of difference can I expect? Thanks for your help, Ryan