For 1990-2009 cars

# ROUGH 3-4 SHIFT FEEL & REVISED ASSEMBLY SEQUENCE/325 TRANS.

BEGINNING MID-MARCH 1982, ALL 325-4L "AJ" MODEL TRANSMISSIONS WERE BUILT USING A REVISED ASSEMBLY SEQUENCE FOR THE 3-4 ACCUMULATOR PISTON AND THE ADDITION OF A 3-4 ACCUMULATOR SPRING, FIGURE 2. THIS SEQUENCE CHANGE WILL PROVIDE A MORE DESIRABLE 3-4 SHIFT FEEL. IF THE 3-4 ACCUMULATOR PISTON IS INSTALLED AS SHOWN IN FIGURE 1, WITH NO 3-4 ACCUMULATOR SPRING, AND THE CONDITION IS A ROUGH 3-4 SHIFT, PROCEED AS FOLLOWS: SERVICE INFORMATION 1.INSTALL THE 3-4 ACCUMULATOR PISTON INTO THE ACCUMULATOR HOUSING IN AN INVERTED POSITION (SPRING POCKET SIDE UP, FIGURE 2). 2.INSTALL A NEW SPRING (PART NO. 8635277) OVER THE PISTON.(SAME ORIENTATION AS THE 1-2 ACCUMULATOR.) 3.DO NOT INSTALL THE SNAP RING AT THE TOP OF THE ACCUMULATOR PIN. SUBJECT: ROUGH 3-4 SHIFT MODEL: 1982 THM 325-4L AM & BE MODELS SOME 1982 THM 325-4L TRANSMISSIONS, AM & BE MODELS ONLY, MAY EXPERIENCE A ROUGH 3-4 SHIFT, THAT SOMETIMES MAY BE FELT AS A 3-4 LETUP "BUMP". TO CORRECT THIS CONDITION, A SERVICE PACKAGE HAS BEEN MADE AVAILABLE. THIS SERVICE PACKAGE CONTAINS A REVISED ACCUMULATOR HOUSING, THAT HAS THE PISTON POCKET MACHINED 5 MM (.190 IN.) DEEPER, AND TWO ACCUMULATOR PINS THAT ARE 5 MM (.190 IN.) LONGER. IN ADDITION, A REVISED 3-4 ACCUMULATOR SPRING MUST BE INSTALLED. THESE PACKAGES WILL LENGTHEN THE STROKE OF THE 3-4 PISTON AND PROVIDE A SMOOTH 3-4 SHIFT FEEL. WHEN SERVICING ANY AM & BE MODEL THM 325-4L TRANSMISSION FOR A ROUGH 3-4 SHIFT, ORDER SERVICE PARTS LISTED BELOW: (ON CAR SERVICE) 1.ACCUMULATOR HOUSING PACKAGE 8635935 2.ACCUMULATOR SPRING 8635702

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.