Full Size Chevrolet V8-305 5.0L (1984)
Turbine Shaft: All Technical Service Bulletins
A/T - Late Engagement or Slipping In Drive
Number:
84-12
Section:
VIIc
Date:
Oct., 1983
Subject:
LATE ENGAGEMENT OR SLIPPING IN DRIVE
Model and Year: 1984 THM 200C
FIGURE 1 - SLIPPING DRIVE RANGE
TO:
ALL CHEVROLET DEALERS
Some early 1984 model THM 200C transmissions may experience a late engagement or slipping in drive range. This condition is
usually detected while the transmission is cold, and could be caused by a blocked forward clutch feed orifice hole (see Figure 1).
Other causes for late engagement or slipping in drive are, low transmission oil level cut or nicked forward clutch piston seals and/or cut
or nicked teflon (R) turbine shaft seals.
This bulletin is for early 1984 model THM 200C transmissions. Refer to the chart below and verify serial model numbers. If the serial
number is prior to the number on the chart then follow this procedure.
MODEL
SERIAL NUMBER
BH
54628
OI
21738
CZ
1041
JY
1075
OR
1119
OU
1727
SERVICE PROCEDURE
1.
Check transmission oil level correct if required.
2.
Visually inspect the forward clutch piston seals and turbine shaft teflon (R) seals for cuts and nicks.
FIGURE 2 - ALLEN WRENCH