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It is most likely that your truck has the 4.625 gears, with the 4.875's being the option. Try as I might, I have not found 4.875's in a Gen I (YET!!!).


to this day the 4.8 gears i found and got are the only ones i have seen.they sure i nice with 35's

87 dodge power ram 50,35" tires,5 1/2" total lift,4.6 gears,lockers front and rear,Rancho RS5000's,custom front bumper,custom rock sliders,cct extended diff breathers,75 amp alt(40 amp stock),thorely header,K&N,wheeled hard...