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OD THRUST PLATE SELECTION (1) Place overdrive unit in vertical position. Mount it on blocks, or in workbench with appropriate size (2) Determine correct thickness overdrive piston thrust plate as follows: (a) Position Gauge Tool 6311 across face of over- drive case. Then position Dial Caliper C-4962 over (b) Measure distance to clutch hub thrust bear- ing seat at four points 90° apart. Then average (c) Select and install required thrust plate from information in thrust plate chart (Fig. 191). keep planetary and clutch hub splines in alignment (4) Transmission speed sensor can be installed at this time if desired. However, it is recommended that OVERDRIVE PISTON (1) Install new seals on overdrive piston. ing. (3) Position Guide Ring 8114-1 on outer edge of overdrive piston retainer. (4) Position Seal Guide 8114-3 on inner edge of overdrive piston retainer. (5) Install overdrive piston in overdrive piston retainer by: (a) Aligning locating lugs on overdrive piston to the two mating holes in retainer. (b) Lubricate overdrive piston seals with Mopar t Door Ease, or equivalent. (c) Install piston over Seal Guide 8114–3 and inside Guide Ring 8114–1. (d) Push overdrive piston into position in retainer. (e) Verify that the locating lugs entered the lug bores in the retainer. ate shaft. (7) Install overdrive piston thrust plate on over- drive piston. (8) Install overdrive piston thrust bearing on over- drive piston. (9) Install transmission speed sensor and O-ring seal in overdrive case. INSTALLATION (1) Be sure overdrive unit Alignment Tool 6227-2 is fully seated before moving unit. If tool is not (2) If overdrive piston retainer was not removed during service and original case gasket is no longer (3) Cut out old case gasket around piston retainer with razor knife (Fig. 192). (4) Use old gasket as template and trim new gas- ket to fit. (5) Position new gasket over piston retainer and on transmission case. Use petroleum jelly to hold Fig. 190 Overdrive Piston Thrust Plate Measurement 1 - SPECIAL TOOL 6311 Fig. 191 Overdrive Piston Thrust Plate Selection 21 - 364 AUTOMATIC TRANSMISSION - 46RE AN OVERDRIVE UNIT (Continued) |