A/T - Reverse Engagement Shift Feel: Overview
Number: 87-105Section: 7A
Date: APRIL, 1987
Subject: REVERSE ENGAGEMENT SHIFT FEEL
Model and Year: 1987 PASSENGER CARS WITH THM 700-R4 TRANSMISSIONS
1987 TRUCKS & VANS WITH THM 700-R4 TRANSMISSIONS
TO: ALL CHEVROLET DEALERS
This Bulletin covers changes to the 1987 THM 700-R4
transmission to improve shift feel when REVERSE is selected
from any gear range and other new parts in the forward and
3-4 clutch assemblies. These parts changes mean you will
have to use new service procedures in this bulletin that are not in the 1987 Service Manual.
FIGURE 1 - TRANSMISSION ID INFORMATION:
Date of Production Change: (Figure 1) Starting February 9, 1987 (Julian Date 040) all 1987 THM 700-R4 production and Service Replacement Transmisson Assembly (SRTA) models were built with new parts in the Reverse, Lo and Reverse, Forward and 3-4 Clutch Assemblies.
Service Action:
Each "SUBJECT" in this bulletin will help you to identify new parts, show how to overhaul the new clutch assemblies and explain which parts can service a 1982-1986-1987 (before Julian Date 040) THM 700-R4 transmission.
Service Parts Information:
Each "SUBJECT" will give the new part numbers and
descriptions for each of the subject clutches. It may be
necessary to VIP order these new parts from GM Service Parts Operations (GMSPO).
Service Manual Reference:
The 1987 Service Manual procedures can be used to remove the clutch assemblies from the transmission. Use the information in this bulletin to bench overhaul the clutches.
Service Notes:
IMPORTANT: Also use the information in Chevrolet Dealer Service Bulletins 87-56 and 87-107 when assembling any 1987 THM 700-R4 transmission.