grandpa
Member
4.90 Gear and parts
Here is a list of parts I used to install the 4.90 gears in a 1999 rear locking differential. The prices are for new Mitsubishi parts from SouthWestautogroup.com.
Part Number..................Description...........................Jan 2016 Price Paid
MR124858....................4.90 Ring & Pinion Gear Set......$ 336.76
MB837842....................Pinion Spacer.........................$ 6.83......Not a crush sleeve, used to set pinion rotating torque with correct shim
MR580530....................Pinion Oil Seal........................$ 14.71
MR179440....................Rear Pinion Bearing Shim Set.....$ 22.99.....Used to set pinion depth
MR569391....................Front Pinion Bearing Shim Set...$ 31.31......Used to set pinion rotating torque
MB837844....................Rear Pinion Bearing & Race.......$ 46.86
MB393471....................Front Pinion Bearing & Race......$ 34.28
I didn't purchase side bearings since I reused the ones in the differential. You will have to remove one side bearing to remove the air locking diaphragm so you can install the ring gear.
I would suggest buying two front and rear pinion bearings. Hone out the ID of one set to use as setup bearing for easily changing shims until you get the correct pattern. Then you can install the permanent bearing with a press or by heating.
Here is a list of parts I used to install the 4.90 gears in a 1999 rear locking differential. The prices are for new Mitsubishi parts from SouthWestautogroup.com.
Part Number..................Description...........................Jan 2016 Price Paid
MR124858....................4.90 Ring & Pinion Gear Set......$ 336.76
MB837842....................Pinion Spacer.........................$ 6.83......Not a crush sleeve, used to set pinion rotating torque with correct shim
MR580530....................Pinion Oil Seal........................$ 14.71
MR179440....................Rear Pinion Bearing Shim Set.....$ 22.99.....Used to set pinion depth
MR569391....................Front Pinion Bearing Shim Set...$ 31.31......Used to set pinion rotating torque
MB837844....................Rear Pinion Bearing & Race.......$ 46.86
MB393471....................Front Pinion Bearing & Race......$ 34.28
I didn't purchase side bearings since I reused the ones in the differential. You will have to remove one side bearing to remove the air locking diaphragm so you can install the ring gear.
I would suggest buying two front and rear pinion bearings. Hone out the ID of one set to use as setup bearing for easily changing shims until you get the correct pattern. Then you can install the permanent bearing with a press or by heating.