A/T - Revised One Piece Rod Assembly

Number: 83-I-104

Section: VIIc

Date: July, 1983
Subject: ONE PIECE ROD ASSEMBLY - PARKING LOCK - 1983 THM 200-4R

TO: ALL CHEVROLET DEALERS

One Piece Rod Assembly:

Beginning in October, 1982, the parking lock rod assembly, in all 1983 THM 200-4R transmissions, was changed to a one piece assembly (Figure 2). Previously, the parking lock rod assembly was a two piece assembly (Figure 1).

In servicing any THM 200-4R with this parking lock rod assembly, it is important that the correct detent lever be used. Refer to the chart below for proper usage of the parts for the parking lock rod assembly. These parts are not interchangeable.
First Design

Rod Assembly - Parking Lock - 8639110

Lever - Inside Detent - 8634184
Second Design

Rod & Lever Assembly - Parking Lock - 8634991