Firebird V8-305 5.0L VIN F FI (1987)
Turbine Shaft: All Technical Service Bulletins
A/T - Turbine Shaft Seal Information
Number
87-7-26
Date
5/87
BURNED FORWARD, OVERRUN OR 3-4 CLUTCHES -
Subject:
SERVICE AND PARTS INFORMATION FOR TURBINE SHAFT SEALS
1987 SAFARI WAGON AND FIREBIRD MODELS EQUIPPED WITH THM 700-R4 (MD8)
TRANSMISSION MODELS: ALL
BULLETIN COVERS:
New, solid (not "scarf cut") turbine shaft seals, service tools, procedures and parts.. Information in this bulletin is not included in your 1987 Service
Manual.
Figure 1 - THM 700-R4 TRANSMISSION IDENTIFICATION INFORMATION
DATE OF PRODUCTION/SRTA CHANGE:
(Figure 1)
By October 6, 1987 (Julian Date 279) all 1987 THM 700-R4 production and Service Replacement Transmission Assembly (SRTA) models were built
with solid turbine shaft seals.
SERVICE ACTION:
Solid turbine shaft seals must be used on all 1987 THM 700-R4 transmissions produced with Auxiliary Valve Bodies. If "scarf cut" seals are used on a
1987 model with an auxiliary valve body assembly, a condition of burned forward, overrun or 3-4 clutches can occur. Both types of turbine shaft seals
can be used on a 1982 through 1986 THM 700-R4 transmission but solid seals are recommended on all models.
Figure 2 - Turbine Shaft Oil Seal Rings Installing and Sizing
Installation and sizing of solid turbine shaft seals is done with Kent-Moore tools J-36418-1 and J-36418-2 (Figure 2). The KentMoore sizing tool
J-36418-2 needs to be altered at the flanged end of the tool. The instruction sheet that comes with the tool shows to use the tool with the flanged end
down. The flange must be removed to allow the tool to size the bottom seal ring. Alter the Kent-Moore sizing tool using the following procedure: