Montero 4WD L4-2555cc 2.6L SOHC (1984)
Pinion Bearing: Technical Service Bulletins
Differential Drive Pinion Bearing - New
SUBJECT:
DIFFERENTIAL DRIVE PINION BEARING
NO.
STB-85-03-001
DATE
October 1985
MODEL All RWD vehicles
PURPOSE This bulletin announces availability of new differential drive pinion bearings which have a lower preload than easier drive pinion bearings
and a different method of measuring the preload torque. Installation instructions and preload specifications are included.
DATE OF PRODUCTION CHANGE The new bearings entered production on the following dates:
4WD Truck and Montero - Front Differential
June, 1984
4WD Truck and Montero - Rear Differential
November, 1984
Starion and 2WD Truck
June, 1984
IDENTIFICATION OF BEARINGS Both the new and the old bearings are embossed with the manufacturer's name and identification number on the
bearing race. The identification data are given in Table 1 below.
REPLACEMENT PROCEDURE
1.
Obtain new front and rear bearings selected from Table 1. Both bearings must be replaced as a set. Never mix an "old" part number with a "new"
part number for example when replacing Starion bearings do not use one KOYO bearing and one NTN bearing.
2.
Remove the differential and ring gear assembly from the carrier.
3.
Remove the drive pinion companion flange nut and washer, and tap off the companion flange.
NOTE:
Use Tool MB990767-01 to hold the flange while loosening the nut.
4.
Top the end of the drive pinion shaft with a soft hammer to remove the pinion, spacer and front shim from the carrier.
5.
Remove the drive pinion rear bearing inner race as follows:
a)
Insert collets MIT 44801 into special tool MB990339-01 (found on the transmission tool board) and insert the edge of the collet between the
bearing and drive pinion gear.
b)
Slip special tool MIT303173 over the bearing, put the cup of tool MB990339-01 over it, and tighten the knurled ring against the inside of the
drum of the tool (not the outside as shown in the Service Manual).
6.
Top out the bearing races as shown in the Service Manual and remove the pinion oil seal.
7.
Clean the inside of the carrier.
8.
Install the outer races of the new bearings into the carrier, using the special tools shown in the Service Manual.
