I just did mine about six months ago. Speedy-Sleeve P/N 99287. You will have to cut a hole in the stallation tool to fit over the long axle tube. Also you will have to grind down the width of the speedy sleeve since they only come in one size of width after installtion. I didn't need to remove the flange of the speedysleeve. Use good seals by CR seals by Chicago Rawhide P/N 417158 also if needed P/N 0438186 Axle Gasket from the dodge dealer. you will need 2 9/16 Dana nut Removal tool. Oreilly, Napa. about $35 bucks. hope this helps. I have been told that dodge used three different types of axles on the first gens. So use my data as a reference and let me know how it goes!
1991 EARLY 250 CUMMINS DIESEL DODGE TRUCK LE 3/4 TON. STOCK ENGINE (160 HP) NON-INTERCOOLED, A/C, REBUILT TORQUE CONVERTER BY HUGHES PERFORMANCE TOWMASTER. GRAVES PRO SHOP (SAN ANTONIO) TX REBUILT STOCK A727 TORQUEFLITE 3-SPEED AUTOMATIC WITH GEAR VENDOR. WOW! 3. 07 DIFF. RANCHO ADJUSTABLE REAR, BILSTEIN FRONT, K&N FILTER, AUX-COMBO TOOLBOX WITH 40 DIESEL GALLON TANK. AUTOMETER DIESEL TACH, transmission, PYRO, BOOST. FORMER FRONT AUTO transmission COOLER IS NOW COOLER FOR POWER STEERING WITH INLINE FILTER WITH A MAG. COOLANT FILTER KIT INSTALLED. REPLACED ALL BRAKE LINE TO STAINLESS STEEL FLEX LINES. ALL PADS AND SHOES SEVERE DUTY. STEERING STABILIZER.