Hi Customer (name blocked for privacy), If your throttle valve (kickdown) adjustment is not set the transmisson will not shift at the correct times. This procedure will help you. Pinion Factor will not make a substantial change in shift points.

THROTTLE PRESSURE LINKAGE ADJUSTMENT

The throttle pressure rod adjustment is very important to proper transaxle operation. This adjustment positions a valve which controls shift speed, shift quality, and part throttle downshift sensitivity. If the setting is too short, early shifts and slippage between shifts may occur. If the setting is too long, shifts may be delayed and part throttle downshifts may be very sensitive.

With engine at operating temperature, adjust idle speed of engine using a tachometer. Refer to Fuel System for idle speed Specifications and adjustment.

ROD ADJUSTMENT PROCEDURE

1. Perform transaxle throttle pressure adjustment while engine is at normal operating temperature.
2. Loosen adjustment swivel lock screw.
3. To insure proper adjustment, swivel must be free to slide along flat end of throttle rod. Disassemble and clean or repair parts to assure free action, if necessary.
4. Hold transaxle throttle lever firmly toward engine, against its internal stop. Tighten swivel lock screw to 11 N·m (100 in. lbs.)
5. The adjustment is finished and linkage backlash was automatically removed by the preload spring.
6. If lubrication is required see Group 0, Lubrication.