:scratch:
I didn't have to replace the speed sensor.
There is one other thing you could try and that is adjust the Throttle Valve cable which is located on the throttle body. But that is mainly to fine tune the shift points but if the cable is off just a tad it will make a difference. Do you know what I'm talking about?
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THROTTLE VALVE CABLE
DESCRIPTION
Transmission throttle valve cable (Fig. 244) adjustment
is extremely important to proper operation.
This adjustment positions the throttle valve, which
controls shift speed, quality, and part-throttle downshift
sensitivity.
If cable setting is too loose, early shifts and slippage
between shifts may occur. If the setting is too
tight, shifts may be delayed and part throttle downshifts
may be very sensitive.
The transmission throttle valve is operated by a
cam on the throttle lever. The throttle lever is operated
by an adjustable cable (Fig. 245). The cable is
attached to an arm mounted on the throttle lever
shaft. A retaining clip at the engine-end of the cable
is removed to provide for cable adjustment. The
retaining clip is then installed back onto the throttle
valve cable to lock in the adjustment