I have a 1995 Jeep Wrangler. It has a 4cyl. engine with 165,000 miles and a 5 speed transmission. Im installing a 6 in. lift on it and wanting to put 33x12.50-r15 mud terrains on it. With the 30's that it has on it now though it is pretty weak on power. Are the bigger tires gonna hurt my tranny everything is stock besides the lift of course?