Hello all what I need to know is the spider and side gears ina Dana 35 all the same with c clips or bolt in axles.I have a 92 xj with 4.0 5 speed with 3.07 gears and a junked 85 with 2.5 with 5 speed with 3.73 gears.My jeep is a DD drive maybe 10 miles a day in town and once a week 50 to 100 mile round trip to some where.I put 235/75/R15 on it had 225/75/R15 before .Looking for a little bit better milage and some more power.If I can just pull the diff and change the gears and set it up to spec. But i dont know if the spider gears are the same the 85 has bolt in axles and a vc disco in the front my 92 dose have a disco any help thank you.