Lumina L4-151 2.5L (1991)
IV HARSH 3-2 SHIFT MANEUVER AT 17-20 MPH - 1985-1/2 - 1986 A Cars
A 3-2 shift maneuver is obtained by allowing the vehicle to coastdown to 17-20 mph (with closed or zero throttle) and then stepping into the throttle to
obtain a 3-2 shift.
Service Procedure:
At start of production (SOP) 1987, an orifice pipe was added between the 1-2 servo release cover plate and the 3-2 coastdown valve to allow a smoother
second gear apply (Figure 6). The four new parts installed as a set will service certain past model transaxles with a harsh 3-2 shift maneuver condition.
