i was looking into buying knew gears for my jeep, after clayton i relized just how bad i need them, and i cant decide between 5.13 or 4.88 i have heard from a few people that the 5.13 are a lot weaker than the 4.88 due to the pinion gear size, has any one had any experiance with these. the jeep has the pos three speed dana 20 and chev 350 motor running on 36's and d44s