A/T - New Differential Case and Bearings
84renault3 2E236OCTOBER 1984
1983 ALLIANCE 1984 ALLIANCE/ENCORE
MB1 AUTOMATIC TRANSAXLE Attention: Workshop, Parts Department
NEW DIFFERENTIAL CASE AND BEARINGS
A new Type II differential case with higher capacity differential bearings has been introduced into production of 1984 MB1 automatic transaxles. The new MB1 case and bearings entered Alliance/Encore production beginning with Fab. No. 97073.
FIGURE 1 - TYPE II DIFFERENTIAL CASE:
The Type II differential case is 2 mm larger in diameter and features a thrust shoulder (T) for improved case strength and ring gear positioning (Fig. 1). The differential housing has a larger bore to accommodate the larger diameter case.
The new higher capacity bearings have the same outside diameter as the older bearings. However, the new large diameter bearing is 0.7 mm narrower in width than the bearing used previously. The narrower bearing plus dimensional changes to the differential case require the use of a 1.4 mm thick spring washer (E) and an 0.4 mm thick spacer (R). The spacer is installed between the spring washer and differential case (Fig. 1).
PARTS INTERCHANGEABILITY
The Type II differential case cannot be used in older differential housings because the case bore in these housings is not large enough. However, the new bearings can and should be used, especially when replacing differential bearings to correct a noise condition. Bearing replacement procedure is as follows.
FIGURE 2 - INSTALLING NEW HIGH CAPACITY BEARINGS ON TYPE I DIFFERENTIAL CASE:
INSTALLING NEW BEARINGS ON TYPE I DIFFERENTIAL CASE
1. Remove old bearings and spring washer.
2. Install three 0.4 mm thick spacers (R), 7703 053 561, on case (Fig. 2).
3. Install 1.4 mm thick spring washer (E), 7700 723 384, on case (Fig. 2).
4. Install large bearing (B), 7703 090 324, on case (Fig. 2).
5. Install small bearing (A), 7703 090 316, on case (Fig. 2).
Filing Instructions
Record this I.S. Note on pages 61 and 70 and file it in your May 1984 edition T.A.M. . . binder.