For 1990-2009 cars

# NEW DESIGN SNAP RING SERVICING THM 700-R4

BEGINNING SEPTEMBER 1, 1983 ALL THM 700-R4 TRANSMISSION WERE BUILT WITH A REVISED DESIGN SNAP RING FOR BOTH THE REACTION SUN GEAR AND LO AND REVERSE SPRING RETAINER TO CASE. (SEE FIGURE 1) WHEN DISASSEMBLING OR INSPECTING ANY THM 700-R4 TRANSMISSION, IT IS NOT NECESSARY TO REMOVE THE SNAP RING FROM THE REACTION SUN GEAR UNLESS YOU INTEND TO REPLACE IT. WHEN SERVICING ANY THM 700-R4 TRANSMISSION REACTION SUN GEAR OR LO AND REVERSE SPRING RETAINER TO CASE SNAP RING, REPLACE IT WITH PART NO. 8647337. WHEN INSTALLING THE SNAP RING, DO NOT OVER EXPAND IT.

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.